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Title: A NEURAL INHIBITION MODEL OF THE P(300) COMPONENT OF THE AVERAGED EVOKED POTENTIAL.
Creator: WILLIAMS, CATHY SUZANNE, Florida Atlantic University
Abstract/Description: Visual and auditory evoked potentials were studied in a selective attention paradigm similar to that of Posner and Boies (1971) wherein a visual letter-matching task was interrupted by auditory probes on selected trials. A neural inhibition model of the P300 component was proposed which generated the hypothesis that the P300 component in response to auditory probes would be greatest in amplitude to probes which occurred between the two to-be-remembered test letters and smaller in amplitude to...
Show moreVisual and auditory evoked potentials were studied in a selective attention paradigm similar to that of Posner and Boies (1971) wherein a visual letter-matching task was interrupted by auditory probes on selected trials. A neural inhibition model of the P300 component was proposed which generated the hypothesis that the P300 component in response to auditory probes would be greatest in amplitude to probes which occurred between the two to-be-remembered test letters and smaller in amplitude to probes which occurred before the presentation of the first test letter. General support for the neural inhibition model was found, however, systematically shifting prestimulus baselines were also observed within these time intervals thereby raising the possibility that the differences in P300 amplitudes were due to nonspecific changes in the general arousal level of the subject. It was also found that instruction-induced differences in response speed affected the amplitude of the evoked potential components in a way which could most parsimoniously be attributed to shifts in general arousal.
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Date Issued: 1980
PURL: http://purl.flvc.org/fcla/dt/14032
Subject Headings: Evoked potentials (Electrophysiology), Electroencephalography
Format: Document (PDF)

Title: The Effect of Focused Breathing on Response Inhibition and Perception of Affective Words: A Behavioral and an EEG Study.
Creator: Ahne, Emily, Rosselli, Monica, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: When practiced over long periods of time (>16 weeks), mindfulness positively impacts inhibitory processing, in that as mindfulness exposure and experience increases, inhibitory processing is enhanced. Similarly, long-term mindfulness practice diminishes the impact of emotionally-valanced scenes. However recently, more work is underway on how brief mindfulness inductions impact these same outcomes. Across two online pilot studies (behavioral outcomes only) and one in-person experiment ...
Show moreWhen practiced over long periods of time (>16 weeks), mindfulness positively impacts inhibitory processing, in that as mindfulness exposure and experience increases, inhibitory processing is enhanced. Similarly, long-term mindfulness practice diminishes the impact of emotionally-valanced scenes. However recently, more work is underway on how brief mindfulness inductions impact these same outcomes. Across two online pilot studies (behavioral outcomes only) and one in-person experiment (behavioral and neuronal outcomes), how a brief focused-breathing induction impacts response inhibition and the perception of affective words was explored. Findings demonstrate that a 30-minute mindfulness induction produced a diminished Simon Effect, as well as faster processing of neutral and positive words (faster LPP latencies) and less-effortful processing of negative words (reduced LPP amplitudes). How brief mindfulness inductions may impact resting frontal alpha asymmetry were also explored.
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Date Issued: 2022
PURL: http://purl.flvc.org/fau/fd/FA00014031
Subject Headings: Mindfulness, Electroencephalography, Behavior
Format: Document (PDF)

Title: Electrophysiological Correlates of Emotion Word Processing in Spanish-English Bilinguals.
Creator: Vélez-Uribe, Idaly, Rosselli, Monica, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: An EEG experiment was design to test the influence of level of proficiency on processing of emotion content between languages in a sample of Spanish-English bilinguals divided by proficiency levels between two groups of bilinguals, one group of balanced (n=23) and another of unbalanced bilinguals (n=26). The participants rated words in three categories (negative, neutral, and positive) in terms of emotional valence in English and Spanish while EEG was recorded. Event-related potentials were...
Show moreAn EEG experiment was design to test the influence of level of proficiency on processing of emotion content between languages in a sample of Spanish-English bilinguals divided by proficiency levels between two groups of bilinguals, one group of balanced (n=23) and another of unbalanced bilinguals (n=26). The participants rated words in three categories (negative, neutral, and positive) in terms of emotional valence in English and Spanish while EEG was recorded. Event-related potentials were calculated for two components related to emotion processing: the early posterior negativity (EPN) and the late positive complex LPC. 2 (Bilingual group) x 2 (language) x 3 (valence) x 3 (electrode) analyses were conducted on each component, separately for latency and amplitude. The results for the EPN latency indicated a marginally significant valence effect, with emotion words presenting shorter latencies than neutral words across conditions indicating a processing advantage of emotion content in both languages. The EPN amplitude also reflected the effect of valence, with larger amplitudes both emotion categories than for neutral words. The overall EPN amplitude was larger in Spanish than in English for both bilingual groups across valence categories. The LPC latency was longer in English than in Spanish for both bilingual groups, possibly related to Spanish being identified as native language in most of the sample. The LPC amplitude was larger for negative than for emotion than for neutral words for both groups in English and in Spanish for the Balanced group. The Unbalanced group, however, presented larger for positive than for neutral, and for neutral than for negative words. These results suggest that the Balanced and Unbalanced groups process emotion content similarly in English, but differently in Spanish. The Valence effects were consistent across languages for the Balanced group, but not for the Unbalanced group which might reflect an attenuation of the valence effect for negative words in Spanish for this group, and could indicate weaker emotional reactivity to negative words in the less proficient language.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013104
Subject Headings: Bilingualism, Language and emotions., Electroencephalography.
Format: Document (PDF)

Title: Changes in brain electrical activity (EEG) of the awake freshwater turtle Trachemys scripta elegans during anoxia.
Creator: Fernandes, Jacqueline A., Florida Atlantic University, Lutz, Peter L.
Abstract/Description: There is evidence that suggests that electrical depression might be an important energy saving mechanism during anoxia. This study investigates in more depth the changes in electrographic (EEG) activity of the awake and behaving anoxia-tolerant turtle Trachemys scripta elegans when the turtle was breathing 100% N2. The drastic depression of electrical activity by 75% shown in response to anoxia suggests that electrical depression may be the major contributor to metabolic depression and...
Show moreThere is evidence that suggests that electrical depression might be an important energy saving mechanism during anoxia. This study investigates in more depth the changes in electrographic (EEG) activity of the awake and behaving anoxia-tolerant turtle Trachemys scripta elegans when the turtle was breathing 100% N2. The drastic depression of electrical activity by 75% shown in response to anoxia suggests that electrical depression may be the major contributor to metabolic depression and conservation of energy necessary for survival of long periods of anoxia. However, adaptative response to anoxia does not simply consist of a mere depression of brain activity. In fact, there seems to be a systematic shutting down of some of the electrical components of the brain in a very structured manner during entry to anoxia. These components are associated with the slowing down activity of the brain and thus reducing its energy utilization. The EEG changes accompanying recovery in air were different from the depressive processes of entry into anoxia. Extended slow wave activity during recovery in air is similar to the activity pattern seen in the emergence phase of hibernating mammals. It is likely that there are important parallels between the electrical patterns of anoxia and those of hibernating mammals.
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Date Issued: 1996
PURL: http://purl.flvc.org/fcla/dt/15241
Subject Headings: Red-eared slider, Electroencephalography
Format: Document (PDF)

Title: Neural correlates of rhythmic auditory stimulation and rhythmic movement: Rate dependence and transient to steady-state transition.
Creator: Carver, Frederick White, Florida Atlantic University, Kelso, J. A. Scott, Fuchs, Armin
Abstract/Description: The experiments in this dissertation were designed to produce a systematic characterization of the neuroelectric and neuromagnetic correlates of isochronous tone stimulation and simple rhythmic movements over a broad range of rates. The goal was to determine how the cortical representation of rhythm changes with rate, which would provide insight into known rate-dependent differences in perceptual and coordinative abilities. Fundamental transitions in the composition of the auditory and motor...
Show moreThe experiments in this dissertation were designed to produce a systematic characterization of the neuroelectric and neuromagnetic correlates of isochronous tone stimulation and simple rhythmic movements over a broad range of rates. The goal was to determine how the cortical representation of rhythm changes with rate, which would provide insight into known rate-dependent differences in perceptual and coordinative abilities. Fundamental transitions in the composition of the auditory and motor responses were hypothesized to occur within the parameter ranges studied here, including the attenuation of major response components and a shift from discrete transient activity at low rates to continuous steady-state activity at high rates. The auditory responses were studied in separate electroencephalography (EEG) and magnetoencephalography (MEG) experiments with stimulation rates ranging from 0.5 to 8Hz. In both studies, a transition from a transient to a continuous steady-state representation of the tone sequence occurred near 2Hz. In addition, an N1m component of the transient responses disappeared at rates near 8Hz, which may indicate the border beyond which tones are no longer distinct since the response is known to be an index of novelty in the auditory environment. Moreover, in a result important for understanding how evoked activity interacts with activity already present in the cortex, the phase of ongoing 40Hz rhythms is shown to affect the amplitude of the auditory evoked 40Hz response. Rhythmic finger movement was studied using a continuation paradigm in two EEG and MEG experiments at movement rates from 0.5 to 2.5Hz. Major findings included the disappearance of activity associated with movement planning and initiation at rates above 1Hz, suggesting a transition into a steady-state motor response in which there is less direct control of individual movements by the cortex. In addition, the neural correlates of synchronization and continuation were compared, with the results showing a similar cortical organization of metronome-paced and self-paced movements. The attenuation of major response components and the development of continuous steady-state activity within the present parameter ranges indicate rate-dependent changes in the cortical representation of simple rhythms, which are proposed here to relate to known rate-dependent behavioral differences in more complex coordinative environments.
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Date Issued: 2003
PURL: http://purl.flvc.org/fcla/dt/12040
Subject Headings: Electrophysiology, Auditory evoked response, Electroencephalography
Format: Document (PDF)

Title: Rhythmicity, synchrony and resonance within the circuit of Papez.
Creator: Albo Angelus, Zimbul, Florida Atlantic University, Vertes, Robert P.
Abstract/Description: Single unit activity from the anterior thalamus (AT) was recorded in order to investigate discharge profiles during desynchronized (large amplitude irregular activity (LIA)), and synchronized (theta rhythm) patterns of the hippocampal EEG. Units were recorded in urethane-anesthetized rats in the anteroventral (AV, n = 96), the anterodorsal (AD, n = 44) and the anteromedial (AM, n = 48) thalamic nuclei. The majority of the units (n = 164, 87%) were theta-on and a small group (n = 24, 13%) was...
Show moreSingle unit activity from the anterior thalamus (AT) was recorded in order to investigate discharge profiles during desynchronized (large amplitude irregular activity (LIA)), and synchronized (theta rhythm) patterns of the hippocampal EEG. Units were recorded in urethane-anesthetized rats in the anteroventral (AV, n = 96), the anterodorsal (AD, n = 44) and the anteromedial (AM, n = 48) thalamic nuclei. The majority of the units (n = 164, 87%) were theta-on and a small group (n = 24, 13%) was theta-off. Theta-off cells were found in AD and AM nuclei but not in AV. Theta-on cells increased their discharge in presence of hippocampal theta. Mean discharge rate was 6.0 +/- 0.52 Hz and 14.48 +/- 0.96 Hz for AV theta-on cells during control and theta states, 4.43 +/- 0.52 Hz and 10.05 +/- 1.28 Hz for AD theta-on cells, and 2.60 +/- 0.3 Hz and 6.42 +/- 0.9 Hz for AM theta-on cells, respectively. We found that 40% of AV cells showed a rhythmic pattern that peaked significantly at 250--270 ms during theta, 21.9% of AD units and only 5.7% for AM units showed a rhythmic pattern. The majority of AT cells showed unit-theta phase-locked EEG oscillations in the crosscorrelogram, indicating that in spite of low rhythmicity most units firing were modulated at theta frequency. The coherence measured by spectral analysis between unit firing and hippocampal theta was statistically significant in 75% of cases. The anatomical distribution of the cells shows that coherence values were widely distributed across the anterior thalamus. In addition, the particular contribution of this diencephalic structure during theta was determined by applying measures of information flow in the neural circuit of Papez. Partial coherence (PC) analysis together with the computation of causality measures (DTF and DC) was used to study such interaction among AV, retrosplenial cortex and hippocampus. PC analysis revealed hippocampus as the synchronizing structure for rhythmic AV cells and retrosplenial cortex. A link between hippocampus and retrosplenial cortex was found for the non-rhythmic AV group. The DTF analysis showed flow of propagation from AV to hippocampus, hippocampus to retrosplenial cortex and AV to retrosplenial cortex for both groups. The strength of connection changed depending on the state of the animal. Behaviors that have been particularly related to the hippocampal theta activity refer mainly to learning and memory. Activation of large numbers of septo-hippocampal neurons during the generation of the theta rhythm has been proposed as a 'natural tetanizer'. Numerous cellular studies have linked long-term potentiation (LTP) and the hippocampal theta rhythm. The role of theta in memory has been evidenced through lesion studies in animals. Some observations in humans have proposed the anterior thalamus as pivotal for spatial memory. Perhaps the cellular theta activity found in AV plays an important role in the generation and control of the hippocampal theta rhythm and hence in memory and learning.
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Date Issued: 2002
PURL: http://purl.flvc.org/fcla/dt/11976
Subject Headings: Neural circuitry, Electroencephalography, Hippocampus (Brain)
Format: Document (PDF)

Title: Temperament and Electrocortical Development: Examination of Infant Alpha EEG Coherence.
Creator: Gott, Samantha C., Nancy Aaron Jones, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: Temperament and its development have been associated with the alpha band of EEG coherence in previous research that focused on adolescent and adult populations, results suggest that this measure stands as a reliable indicator of emotional states. In the current study, five data sets from previously conducted studies were analyzed to determine if resting state alpha coherence measures differ in various brain regions and are associated with variation in levels of temperament. Additionally, we...
Show moreTemperament and its development have been associated with the alpha band of EEG coherence in previous research that focused on adolescent and adult populations, results suggest that this measure stands as a reliable indicator of emotional states. In the current study, five data sets from previously conducted studies were analyzed to determine if resting state alpha coherence measures differ in various brain regions and are associated with variation in levels of temperament. Additionally, we aimed to determine if, as age increases, a synchronous result in coherence may be seen (specifically, from posterior to anterior), in accordance with neurophysiological development. Regression analyses suggested that the negative affectivity temperamental qualities did not significantly associate with coherence. Repeated-measures analyses yielded significant results in favor of the electrocortical development hypothesis and, through exploratory analysis, more reactive temperament scores depicting positive affectivity, emotional/self-regulation, and activity level displayed in infants who had higher coherence in posterior regions. The study was suggestive of high coherence values associating with highly reactive temperamental attributes in posterior regions in the 3- to 12-month-old participants and higher coherence values displaying in posterior regions compared to anterior regions consistently across age groups.
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Date Issued: 2022
PURL: http://purl.flvc.org/fau/fd/FA00013968
Subject Headings: Infants--Development, Temperament, Electroencephalography
Format: Document (PDF)

Title: EEG Topographic Changes in Opioid Use Disorder.
Creator: Minnerly, Christopher, Tao, Rui, Florida Atlantic University, Department of Biomedical Science, Charles E. Schmidt College of Medicine
Abstract/Description: The present study aimed at quantifying the topographic distribution of spectral power as measured with electroencephalogram (EEG) in patients with opioid use disorder (OUD) across five broad band frequencies (δ, θ, α, β, and γ). Through comparative groups of healthy controls, patients with methamphetamine use disorder, and patients with alcohol use disorder, it was determined that OUD EEG spectral power was globally increased in the δ frequency, and more region-specific in others (frontal...
Show moreThe present study aimed at quantifying the topographic distribution of spectral power as measured with electroencephalogram (EEG) in patients with opioid use disorder (OUD) across five broad band frequencies (δ, θ, α, β, and γ). Through comparative groups of healthy controls, patients with methamphetamine use disorder, and patients with alcohol use disorder, it was determined that OUD EEG spectral power was globally increased in the δ frequency, and more region-specific in others (frontal lobes in θ and β frequencies). α frequency was reduced in occipital lobes in OUD. The observed changes are discussed in terms of the microcircuit-level changes in the cortex. Based on these findings, EEG may prove to be a valuable tool for diagnostic and prognostic evaluation of OUD.
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Date Issued: 2020
PURL: http://purl.flvc.org/fau/fd/FA00013488
Subject Headings: Opioid-Related Disorders, Electroencephalography, Brain Mapping
Format: Document (PDF)

Title: Investigating the Temporal Dynamics of Advanced Information Processing During Interocular Suppression Using Electroencephalography and Pattern Classification.
Creator: Cox, Dustin, Hong, Sang Wook, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: A thorough delineation of the extent of processing possible without visual awareness is necessary to elucidate the neural mechanisms of visual awareness. Despite extensive research, it is presently unclear whether invisible stimuli can undergo advanced processing. To introduce existing work on this topic, previous behavioral efforts to investigate the extent of processing possible without visual awareness and the psychophysical methods used to render stimuli invisible, such as visual masking...
Show moreA thorough delineation of the extent of processing possible without visual awareness is necessary to elucidate the neural mechanisms of visual awareness. Despite extensive research, it is presently unclear whether invisible stimuli can undergo advanced processing. To introduce existing work on this topic, previous behavioral efforts to investigate the extent of processing possible without visual awareness and the psychophysical methods used to render stimuli invisible, such as visual masking and interocular suppression-based techniques, are discussed. Physiological evidence that provide support for and against the possibility that advanced information processing can occur without visual awareness are addressed. The basics of multivariate pattern classification techniques are outlined. The potential of using multivariate pattern classification analyses in conjunction with neuroimaging in the temporal domain to investigate whether advanced processing can occur without visual awareness is discussed. An original study using electroencephalography (EEG) and pattern classification techniques to investigate the extent of processing possible without visual awareness is outlined. The results of the analyses reveal that a pattern classifier did not extract neural signatures of categorical processing from EEG recordings when participants viewed an image that remained invisible for the duration of its presentation. In contrast, the results from a second experiment reveal that the pattern classifier was able to decode the category of invisible images from the EEG time series when the images would eventually become visible. The results provide support for the idea that under certain circumstances, such as when the depth of interocular suppression is reduced, advanced processing for invisible stimuli can occur.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013193
Subject Headings: Advanced information processing, Electroencephalography, Neuroimaging, Visual perception
Format: Document (PDF)

Title: P100 AND N170 RESPONSES TO RACE: DEVELOPMENT AND RELATIONSHIP WITH CONTACT AND IMPLICIT BIAS.
Creator: Fennell, Eli, Anzures, Gizelle, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: Racial bias remains a prevalent issue in society. Clues to the cognitive basis for such biases have been found in EEG studies of the ‘Other Race Effect’ (ORE) in relation to the P100 and N170 event related potentials (ERPs). Previous research in this area has focused on adults, and only one such study has looked at implicit racial biases (He et al., 2009), while only a few have looked at experience with own- and other-race persons (Herzmann et al., 2011; Stahl et al., 2008; Walker et al.,...
Show moreRacial bias remains a prevalent issue in society. Clues to the cognitive basis for such biases have been found in EEG studies of the ‘Other Race Effect’ (ORE) in relation to the P100 and N170 event related potentials (ERPs). Previous research in this area has focused on adults, and only one such study has looked at implicit racial biases (He et al., 2009), while only a few have looked at experience with own- and other-race persons (Herzmann et al., 2011; Stahl et al., 2008; Walker et al., 2008). The present study is the first to examine how race might modulate ERP responses in children, and the first to relate these responses with both implicit racial biases and race contact experience. We examined EEG responses in 5- to 10-year-old children and adults, and whether such responses were associated with implicit racial biases and own- and other-race experience. Results showed that both children and adults displayed larger P100 and N170 responses to other-race faces, greater implicit racial biases related to larger N170 responses to other- than own-race faces, and greater other-race experience related to larger P100 responses to other- than own-race faces. In terms of age differences, we found that compared with adults, children displayed larger and more delayed P100 and N170 responses, and that in children but not in adults, greater experience with own- and other-races were associated with more delayed N170 responses to other- than own-race faces. These findings suggest that age, experience with own- and other-race persons, and implicit racial biases all influence early ERP responses to own- and other-race individuals.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013371
Subject Headings: Racism, Evoked potentials (Electrophysiology), Racial bias, Electroencephalography
Format: Document (PDF)

Title: Bereitschaftspotentials and the frequency and phase characteristics of the EEG preceding bimanual finger movements.
Creator: Wallenstein, Gene Vincent, Florida Atlantic University, Nash, Allan J.
Abstract/Description: A delayed response paradigm was used to investigate the cerebral electroencephalographic (EEG) signal preceding bimanual finger flexions of continuously increasing and decreasing movement rates. The Bereitschaftspotential displayed larger amplitudes at faster required response rates as did two spectral frequency modes, which also showed magnitude reversals depending on the initiating finger. Furthermore, at these specific frequency modes, the averaged relative phase between electrode...
Show moreA delayed response paradigm was used to investigate the cerebral electroencephalographic (EEG) signal preceding bimanual finger flexions of continuously increasing and decreasing movement rates. The Bereitschaftspotential displayed larger amplitudes at faster required response rates as did two spectral frequency modes, which also showed magnitude reversals depending on the initiating finger. Furthermore, at these specific frequency modes, the averaged relative phase between electrode locations C3 and C4, as well as the variance in this measure was found to correspond closely to the variance in inter-response times derived from the subjects' movements. The results suggest the existence of possible signatures on the neurophysiological level which may yield information regarding the efficacy and parametric properties of the impending movement.
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Date Issued: 1992
PURL: http://purl.flvc.org/fcla/dt/14847
Subject Headings: Electroencephalography, Arm, Forelimb, Human mechanics, Neurophysiology
Format: Document (PDF)

Title: Analysis of nucleus reuniens cell behavior during hippocampal theta rhythm.
Creator: Morales, George J., Florida Atlantic University, Morgera, Salvatore D., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: Coherence estimates have been used to determine the presence of functional coupling between two signals. While direct projections from the nucleus reuniens (RE) to the hippocampus formation in the rat have been discovered, little is known about the possible functional influence of the RE on the hippocampus. This investigation makes use of MATLAB to create a set of specialized algorithms to investigate coherence function estimates between RE cell activity and hippocampal EEG. In addition,...
Show moreCoherence estimates have been used to determine the presence of functional coupling between two signals. While direct projections from the nucleus reuniens (RE) to the hippocampus formation in the rat have been discovered, little is known about the possible functional influence of the RE on the hippocampus. This investigation makes use of MATLAB to create a set of specialized algorithms to investigate coherence function estimates between RE cell activity and hippocampal EEG. In addition, error prevention considerations as well as shortcomings in current data acquisition software that ultimately lead to the necessity for additional software analysis tools are also discussed. An investigation into RE cell behavior requires the calculation of cell activity spike rates as well as the identification of action potential bursting phenomena. Isolation of individual cell activity, from a population recording channel, is needed in order to prevent erroneous effects associated with using unresolved multi-neuron recordings. Changes in spike rate activity and frequency of bursting occurrences are calculated as a means of gauging RE unit response to the presence of a stimulus (e.g., tail pinch). The relationship of RE units on hippocampal EEG by analysis of coherence function estimates between RE units and hippocampal EEG, as well as evaluated RE unit behavior in terms of changes in unit spike rate and bursting activity are established.
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Date Issued: 2006
PURL: http://purl.flvc.org/fcla/dt/13383
Subject Headings: Hippocampus (Brain), Electroencephalography, Neurosciences, Theta rhythm, Memory
Format: Document (PDF)

Title: EEG in 1-week, 1-month and 3-month-old infants of depressed and non-depressed mothers.
Creator: Diego, Miguel Angel, Florida Atlantic University, Jones, Nancy Aaron
Abstract/Description: EEG was examined in 348 1-week, 1-month and 3-month-old infants of depressed and non-depressed mothers. Both the percentage of infants exhibiting spectral peaks and the frequency in Hz at which those peaks were exhibited increased with age. Similarly, the EEG spectra showed a developmental increase in absolute power and a decrease in lower frequency and increase in higher frequency components. Infants of depressed mothers exhibited greater 8Hz lower 3Hz relative power and greater left frontal...
Show moreEEG was examined in 348 1-week, 1-month and 3-month-old infants of depressed and non-depressed mothers. Both the percentage of infants exhibiting spectral peaks and the frequency in Hz at which those peaks were exhibited increased with age. Similarly, the EEG spectra showed a developmental increase in absolute power and a decrease in lower frequency and increase in higher frequency components. Infants of depressed mothers exhibited greater 8Hz lower 3Hz relative power and greater left frontal EEG log-absolute power than infants of non-depressed mothers. This profile was specially marked across a narrow frequency range which shifted from 3--9Hz to 4--9Hz by 3-months. Evaluation of 4 different asymmetry indices revealed that while both the log-absolute difference and the absolute ratio asymmetry indices best differentiated infants of depressed from infants of non-depressed mothers, the absolute ratio asymmetry index appeared to minimize within group variability. The significance of these findings are discussed.
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Date Issued: 2002
PURL: http://purl.flvc.org/fcla/dt/12945
Subject Headings: Electroencephalography, Children of depressed persons, Pediatric neurology
Format: Document (PDF)

Title: A PHA-L analysis of projections from the nucleus reticularis pontis oralis, the pedunculopontine tegmental nucleus and the median raphe nucleus in the rat: Implications for the modulation of the hippocampal EEG.
Creator: Fortin, William J., Florida Atlantic University, Vertes, Robert P.
Abstract/Description: Projections of the nucleus reticularis pontis oralis (RPO), the pedunculopontine tegmental nucleus (PPT) and the median raphe nucleus (MR) were examined using the anterograde tracer Phaseolus vulgaris-leucoagglutinin (PHA-L). The RPO projected strongly throughout the reticular core, to the PPT and to the intralaminar thalamic nuclei. Light projections were observed in the posterior hypothalamus but not the supramammillary nucleus. The pattern of labeling suggests that the RPO is arranged...
Show moreProjections of the nucleus reticularis pontis oralis (RPO), the pedunculopontine tegmental nucleus (PPT) and the median raphe nucleus (MR) were examined using the anterograde tracer Phaseolus vulgaris-leucoagglutinin (PHA-L). The RPO projected strongly throughout the reticular core, to the PPT and to the intralaminar thalamic nuclei. Light projections were observed in the posterior hypothalamus but not the supramammillary nucleus. The pattern of labeling suggests that the RPO is arranged topographically in longitudinal columns. The PPT projected to the RPO, MR, medial thalamic and intralaminar nuclei, the supramammillary nucleus and septum. The MR was found to project heavily to the supramammillary nucleus, intralaminar thalamic nuclei, the septum, the hippocampus and several cortical areas. The results are discussed in terms of the modulation of hippocampal EEG and a model is introduced emphasizing interactions among ascending hippocampal EEG synchronizing and desynchronizing systems.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15185
Subject Headings: Hippocampus (Brain), Electroencephalography, Rats as laboratory animals
Format: Document (PDF)

Title: TEMPORAL DYNAMICS OF NEGATIVE AND POSITIVE FACIAL EXPRESSION PROCESSING.
Creator: Escobar, Brian E., Hong, Sang Wook, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: The perception and interpretation of faces provides individuals with a wealth of knowledge that enables them to navigate their social environments more successfully. The present study examined the temporal dynamics of valence information from emotional facial expressions using electroencephalogram (EEG) in conjunction with multi-variate pattern analysis (MVPA). In multiple different classifying conditions, it was demonstrated that when decoding for a positively- vs. a negatively- vs. a...
Show moreThe perception and interpretation of faces provides individuals with a wealth of knowledge that enables them to navigate their social environments more successfully. The present study examined the temporal dynamics of valence information from emotional facial expressions using electroencephalogram (EEG) in conjunction with multi-variate pattern analysis (MVPA). In multiple different classifying conditions, it was demonstrated that when decoding for a positively- vs. a negatively- vs. a neutrally-valenced expression, above chance level decoding accuracy occurs sooner when compared to instances of decoding for a negatively- vs. a negatively- vs. a neutrally-valenced expression. Additionally, results showed that classification accuracy as measured by percentage of correct responses was higher in the classification condition with the positively-valenced expression versus the one with two negatively-valenced expressions. Together, these finding suggest that neural processing of facial expression may occur hierarchical manner, in that categorization between between-valence (positive vs. negative) facial expressions precedes categorization among within-valence.
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Date Issued: 2021
PURL: http://purl.flvc.org/fau/fd/FA00013862
Subject Headings: Facial expression, Electroencephalography, Facial expression--Research
Format: Document (PDF)

Title: Infant Socioemotional Responses When Faced with Social Threat: Implications For Neurophysiological and Bio-hormonal Processing.
Creator: Bernardo, Angela Maria, Jones, Nancy Aaron, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: Infants have an innate desire to form social bonds and jealousy protests are an attempt to regain exclusive maternal attention from a social usurper. The current study examined neurophysiological and bio-hormonal processes related to jealousy responses during the first year and a half of life. Prior to and after the first year of life, infants express jealousy protest behavior when faced with a social threat. Resting-state frontal EEG coherence indicated a developmental shift from bilateral...
Show moreInfants have an innate desire to form social bonds and jealousy protests are an attempt to regain exclusive maternal attention from a social usurper. The current study examined neurophysiological and bio-hormonal processes related to jealousy responses during the first year and a half of life. Prior to and after the first year of life, infants express jealousy protest behavior when faced with a social threat. Resting-state frontal EEG coherence indicated a developmental shift from bilateral connectivity in younger infants to increased frontal specialization in older infants in relation to jealousy responses. Furthermore, 6- to 9-month-old infants exhibited more frontal neuroconnectivity in the right hemisphere (i.e., an area related to negative emotions) of the brain compared to left when faced with social threat. Lastly, social threat activated HPA reactivity in infants higher in temperamental distress. This study provides further evidence for the emerging links between physiological and socioemotional responses in infancy due to loss of exclusive maternal attention.
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Date Issued: 2023
PURL: http://purl.flvc.org/fau/fd/FA00014230
Subject Headings: Infant psychology, Jealousy, Infants--Development, Electroencephalography
Format: Document (PDF)

Title: Flexible Attentional Prioritization of Working Memory Object Representations.
Creator: Pytel, Paige, Ester, Edward, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: Working memory (WM) is an important cognitive function that, among other duties, allows temporary storage of visual representations of objects observed in the sensorium. The visual aspect of this core cognitive function enables our perception of the identity of objects and where those objects are located in space at any particular time to help direct attention. In a typical working memory task, a cue is presented beforehand to guide attention to which objects in an array to encode. The...
Show moreWorking memory (WM) is an important cognitive function that, among other duties, allows temporary storage of visual representations of objects observed in the sensorium. The visual aspect of this core cognitive function enables our perception of the identity of objects and where those objects are located in space at any particular time to help direct attention. In a typical working memory task, a cue is presented beforehand to guide attention to which objects in an array to encode. The performance of our WM abilities can be improved on memory tasks by a retrospective cue resented after the encoding process of working memory. Several mechanisms have been proposed to explain etrospective cue benefits in WM performance, including the removal of irrelevant information from WM, attentional enhancement of the cued representation, protection of the cued representation from subsequent decay or interference, or retrieval head start.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013406
Subject Headings: Memory, Short-Term, Cues, Visual perception, Electroencephalography
Format: Document (PDF)

Title: Using Electroencephalography and Structured Data Collection Techniques to Measure Passenger Emotional Response in Human-Autonomous Vehicle Interactions.
Creator: Park, Corey, Nojoumian, Mehrdad, Florida Atlantic University, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: Wide spread consumer adoption of self-driving cars (SDC) is predicated on a level of trust between humans and the autonomous vehicle. Despite advances being made in the technical abilities of SDCs, recent studies indicate that people are negatively predisposed toward utilizing autonomous vehicles. To bridge the gap between consumer skepticism and adoption of SDCs, research is needed to better understand the evolution of trust between humans and growing autonomous technologies. The question of...
Show moreWide spread consumer adoption of self-driving cars (SDC) is predicated on a level of trust between humans and the autonomous vehicle. Despite advances being made in the technical abilities of SDCs, recent studies indicate that people are negatively predisposed toward utilizing autonomous vehicles. To bridge the gap between consumer skepticism and adoption of SDCs, research is needed to better understand the evolution of trust between humans and growing autonomous technologies. The question of mainstream acceptance and requisite trust is explored through integration of virtual reality SDC simulator, an electroencephalographic (EEG) recorder, and a new approach for real-time trust measurement between passengers and SDCs. An experiment on fifty human subjects was conducted where participants were exposed to scenarios designed to induce positive and negative trust responses. Emotional state was quantified by the EEG beta wave to alpha wave power ratio, and participants self-reported their levels of trust in the SDC after each segment.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013169
Subject Headings: Autonomous vehicles--Psychological aspects, Self-driving cars, Electroencephalography
Format: Document (PDF)

Title: Spatiotemporal patterns of neural fields in a spherical cortex with general connectivity.
Creator: Tayefeh, Vahid, Fuchs, Armin, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Physics
Abstract/Description: The human brain consists of billions of neurons and these neurons pool together in groups at different scales. On one hand, these neural entities tend to behave as single units and on the other hand show collective macroscopic patterns of activity. The neural units communicate with each other and process information over time. This communication is through small electrical impulses which at the macroscopic scale are measurable as brain waves. The electric field that is produced collectively...
Show moreThe human brain consists of billions of neurons and these neurons pool together in groups at different scales. On one hand, these neural entities tend to behave as single units and on the other hand show collective macroscopic patterns of activity. The neural units communicate with each other and process information over time. This communication is through small electrical impulses which at the macroscopic scale are measurable as brain waves. The electric field that is produced collectively by macroscopic groups of neurons within the brain can be measured on the surface of the skull via a brain imaging modality called Electroencephalography (EEG). The brain as a neural system has variant connection topology, in which an area might not only be connected to its adjacent neighbors homogeneously but also distant areas can directly transfer brain activity [16]. Timing of these brain activity communications between different neural units bring up overall emerging spatiotemporal patterns. The dynamics of these patterns and formation of neural activities in cortical surface is influenced by the presence of long-range connections between heterogeneous neural units. Brain activity at large-scale is thought to be involved in the information processing and the implementation of cognitive functions of the brain. This research aims to determine how the spatiotemporal pattern formation phenomena in the brain depend on its connection topology. This connection topology consists of homogeneous connections in local cortical areas alongside the couplings between distant functional units as heterogeneous connections. Homogeneous connectivity or synaptic weight distribution representing the large-scale anatomy of cortex is assumed to depend on the Euclidean distance between interacting neural units. Altering characteristics of inhomogeneous pathways as control parameters guide the brain pattern formation through phase transitions at critical points. In this research, linear stability analysis is applied to a macroscopic neural field in a one-dimensional circular and a twodimensional spherical model of the brain in order to find destabilization mechanism and subsequently emerging patterns.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013119
Subject Headings: Cerebral cortex, Neural circuitry, Electroencephalography, Neural fields, Spatiotemporal patterns
Format: Document (PDF)

Title: Alpha Coherence in Infants of Depressed Mothers.
Creator: Chassin, Victoria, Jones, Nancy Aaron, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
Abstract/Description: Prior research on neurophysiology of infants of depressed mothers commonly has focused on EEG power and asymmetry. Whether infants of depressed mothers show differences in coherence is undetermined. This study examined the development of EEG alpha coherence in infants of mothers with various degrees of depression. Also investigated was the normative development of alpha coherence in infancy. The relationship between maternal depression and infant coherence was analyzed at different infant...
Show morePrior research on neurophysiology of infants of depressed mothers commonly has focused on EEG power and asymmetry. Whether infants of depressed mothers show differences in coherence is undetermined. This study examined the development of EEG alpha coherence in infants of mothers with various degrees of depression. Also investigated was the normative development of alpha coherence in infancy. The relationship between maternal depression and infant coherence was analyzed at different infant ages, from 1-12-months-old. There were significant effects of maternal depression on infant coherence between frontal-occipital regions, frontal-parietal regions, and central-parietal regions, in 1-month-olds. There were also significant maternal depression effects in central-parietal coherence in 1-3-month-olds and 3-6-month-olds. Differences were in the right hemisphere and were generally characterized by lower coherence in infants whose mothers had higher depression. Infants whose mothers had lower depression demonstrated age-related decreases in coherence, but infants of more highly depressed mothers did not show age-related differences.
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Date Issued: 2023
PURL: http://purl.flvc.org/fau/fd/FA00014224
Subject Headings: Electroencephalography, Mother and infant, Children of depressed persons, Alpha coherence
Format: Document (PDF)

Electroencephalography (22)	+ -
Hippocampus (Brain) (3)	+ -
Auditory evoked response (2)	+ -
Children of depressed persons (2)	+ -
Electrophysiology (2)	+ -

Evoked potentials (Electrophysiology) (2)	+ -
Infants--Development (2)	+ -
Jealousy (2)	+ -
Mother and infant (2)	+ -
Neural circuitry (2)	+ -
Visual perception (2)	+ -
Advanced information processing (1)	+ -
Alpha coherence (1)	+ -
Arm (1)	+ -
Auditory pathways (1)	+ -
Auditory perception (1)	+ -
Autism in children -- Research (1)	+ -
Autism spectrum disorders (1)	+ -
Autonomous vehicles--Psychological aspects (1)	+ -
Behavior (1)	+ -
Bilingualism (1)	+ -
Brain Mapping (1)	+ -
Cerebral cortex (1)	+ -
Cognition disorders in children (1)	+ -
Cognitive neuroscience (1)	+ -
Cortisol (1)	+ -
Cortisol. (1)	+ -
Cues (1)	+ -
Dissertations, Academic -- Florida Atlantic University (1)	+ -
Electroencephalography -- Therapeutic use (1)	+ -

Florida Atlantic University (24)	+ -
Charles E. Schmidt College of Science (15)	+ -
Department of Psychology (12)	+ -
Jones, Nancy Aaron (6)	+ -
Center for Complex Systems and Brain Sciences (2)	+ -

College of Engineering and Computer Science (2)	+ -
Department of Computer and Electrical Engineering and Computer Science (2)	+ -
Fuchs, Armin (2)	+ -
Hong, Sang Wook (2)	+ -
Rosselli, Monica (2)	+ -
Vertes, Robert P. (2)	+ -
Ahne, Emily (1)	+ -
Albo Angelus, Zimbul (1)	+ -
Anzures, Gizelle (1)	+ -
Bernardo, Angela (1)	+ -
Bernardo, Angela Maria (1)	+ -
Carver, Frederick White (1)	+ -
Charles E. Schmidt College of Medicine (1)	+ -
Chassin, Victoria (1)	+ -
Cox, Dustin (1)	+ -
Department of Biomedical Science (1)	+ -
Department of Physics (1)	+ -
Diego, Miguel Angel (1)	+ -
Escobar, Brian E. (1)	+ -
Ester, Edward (1)	+ -
Fennell, Eli (1)	+ -
Fernandes, Jacqueline A. (1)	+ -
Fortin, William J. (1)	+ -
Gott, Samantha C. (1)	+ -
Kelso, J. A. Scott (1)	+ -

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