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- Title
- EEG SIGNALS REPRESENT UPDATED MEMORY REPRESENTATIONS IN VISUAL WORKING MEMORY.
- Creator
- Shin, Young Seon, Sheremata, Summer L., Florida Atlantic University, Center for Complex Systems and Brain Sciences, Charles E. Schmidt College of Science
- Abstract/Description
-
Visual working memory (VWM) is a core cognitive system that supports our ability to maintain and manipulate visual information temporarily when sensory information is no longer present in the environment. VWM and mental rotation, a form of mental imagery, require the ability to generate internal images in the absence of stimuli. Both cognitive processes share visual buffer and are associated with representing and manipulating visual information, however, little is known about the intersection...
Show moreVisual working memory (VWM) is a core cognitive system that supports our ability to maintain and manipulate visual information temporarily when sensory information is no longer present in the environment. VWM and mental rotation, a form of mental imagery, require the ability to generate internal images in the absence of stimuli. Both cognitive processes share visual buffer and are associated with representing and manipulating visual information, however, little is known about the intersection between VWM and mental rotation. In the current work, mental rotation was adopted to study updated mnemonic contents in VWM. In this dissertation, I asked whether the brain mechanisms that support VWM and mental rotation overlap. Participants were asked to remember the orientation of grating or to remember and manipulate, that is mentally rotate, the orientation of grating. Behavioral results showed that mental rotation induced lower fidelity representations of orientation. This confirmed that additional usage in visual buffer to manipulate the visual representation provoked by mental rotation involved negative influence in memory fidelity. In the second study, EEG recording was conducted while participants performed the same task. Visual representations were reconstructed from brain oscillations using the inverted encoding model (IEM). It was found that orientation information from the reconstruction was represented in the amplitude of alpha oscillations (8 – 12 Hz) for both maintained and updated mnemonic contents. Together, this work provides evidence that memory manipulation driven by mental rotation has a decisive effect on the fidelity of visual representations in VWM. Additionally this dissertation demonstrates that the updated memory representations as well as the maintained memory representations are carried in EEG oscillations.
Show less - Date Issued
- 2022
- PURL
- http://purl.flvc.org/fau/fd/FA00013890
- Subject Headings
- Short-term memory, Visual Perception, Electroencephalography, Mental rotation
- Format
- Document (PDF)
- Title
- Time-frequency classification of gamma oscillatory activity in the frontoparietal system during working memory.
- Creator
- Romano, Tracy A., Bressler, Steven L., Florida Atlantic University, Charles E. Schmidt College of Science, Center for Complex Systems and Brain Sciences
- Abstract/Description
-
Working memory (WM) is a process that allows for the temporary and limited storage of information for an immediate goal or to be stored into a more permanent system. A large number of studies have led to the widely accepted view that WM is mediated by the frontoparietal network (FPN), consisting of areas in the prefrontal cortex (PFC) and posterior parietal cortex (PPC). Current evidence suggests that task specific patterns of neuronal oscillatory activity within the FPN play a fundamental...
Show moreWorking memory (WM) is a process that allows for the temporary and limited storage of information for an immediate goal or to be stored into a more permanent system. A large number of studies have led to the widely accepted view that WM is mediated by the frontoparietal network (FPN), consisting of areas in the prefrontal cortex (PFC) and posterior parietal cortex (PPC). Current evidence suggests that task specific patterns of neuronal oscillatory activity within the FPN play a fundamental role in WM, and yet specific spatio-temporal properties of this activity are not well characterized. This study utilized multisite local field potential (LFP) data recorded from PFC and PPC sites in two macaque monkeys trained to perform a rule-based, Oculomotor Delayed Match-to-Sample task. The animals were required to learn which of two rules determined the correct match (Location matching or Identity matching). Following a 500 ms fixation period, a sample stimulus was presented for 500 ms, followed by a randomized delay lasting 800-1200 ms in which no stimulus was present. At the end of the delay period, a match stimulus was presented, consisting of two of three possible objects presented at two of three possible locations. When the match stimulus appeared, the monkey made a saccadic eye movement to the target. The rule in effect determined which object served as the target. Time-frequency plots of three spectral measures (power, coherence, and Wiener Granger Causality (WGC) were computed from MultiVariate AutoRegressive LFP time-series models estimated in a 100-ms window that was slid across each of three analysis epochs (fixation, sample, and delay). Low (25- 55 Hz) and high gamma (65- 100 Hz) activity were investigated separately due to evidence that they may be functionally distinct. Within each epoch, recording sites in the PPC and PFC were classified into groups according to the similarity of their power t-f plots derived by a K-means clustering algorithm. From the power-based site groups, the corresponding coherence and WGC were analyzed. This classification procedure uncovered spatial, temporal, and frequency dynamics of FPN involvement in WM and other co-occurring processes, such as sensory and target related processes. These processes were distinguishable by rule and performance accuracy across all three spectral measures- power, coherence, and WGC. Location and Identity rule were distinguishable by the low and high-gamma range.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00004157
- Subject Headings
- Brain--Physiology., Biological rhythms., Attention--Physiological aspects., Cognitive neuroscience., Memory--Age factors., Short-term memory., Neural networks (Computer science)
- Format
- Document (PDF)
- Title
- The effect of age on processing family, famous and novel faces: An fMRI study.
- Creator
- Jones, Lana Casey, Florida Atlantic University, Tuller, Betty, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Facial recognition memory is a specialized system in the human brain, with an effect of familiarity playing a role in the brain activations involved. Previous studies examining the familiar face processing system have used college-aged subjects. However, memory disorders, like those associated with Alzheimer's disease, typically affect adults over sixty. In an attempt to reveal possible differences between young and older adults', two different age groups were subjected to fMRI analysis while...
Show moreFacial recognition memory is a specialized system in the human brain, with an effect of familiarity playing a role in the brain activations involved. Previous studies examining the familiar face processing system have used college-aged subjects. However, memory disorders, like those associated with Alzheimer's disease, typically affect adults over sixty. In an attempt to reveal possible differences between young and older adults', two different age groups were subjected to fMRI analysis while viewing face images with varying familiarity (family, famous and novel). The result showed a significant difference in activations for various cortical areas including the precuneus, cingulate cortex, and fusiform gyrus. Among the differences, an overall trend of greater activation in the left hemisphere for younger subjects compared to the older group was revealed. The results have implications for the study of memory disorders afflicting older adults, like Alzheimer's disease.
Show less - Date Issued
- 2006
- PURL
- http://purl.flvc.org/fcla/dt/13358
- Subject Headings
- Brain--Magnetic resonance imaging, Evoked potentials (Electrophysiology), Memory, Cognition--Age factors, Aging--Psychological aspects, Memory disorders in old age
- Format
- Document (PDF)
- Title
- Of Mice, Men and Memories: The Role of the Rodent Hippocampus in Object Recognition.
- Creator
- Cohen, Sarah J., Stackman, Robert W., Florida Atlantic University, Charles E. Schmidt College of Science, Center for Complex Systems and Brain Sciences
- Abstract/Description
-
Establishing appropriate animal models for the study of human memory is paramount to the development of memory disorder treatments. Damage to the hippocampus, a medial temporal lobe brain structure, has been implicated in the memory loss associated with Alzheimer’s disease and other dementias. In humans, the role of the hippocampus is largely defined; yet, its role in rodents is much less clear due to conflicting findings. To investigate these discrepancies, an extensive review of the rodent...
Show moreEstablishing appropriate animal models for the study of human memory is paramount to the development of memory disorder treatments. Damage to the hippocampus, a medial temporal lobe brain structure, has been implicated in the memory loss associated with Alzheimer’s disease and other dementias. In humans, the role of the hippocampus is largely defined; yet, its role in rodents is much less clear due to conflicting findings. To investigate these discrepancies, an extensive review of the rodent literature was conducted, with a focus on studies that used the Novel Object Recognition (NOR) paradigm for testing. The total amount of time the objects were explored during training and the delay imposed between training and testing seemed to determine hippocampal recruitment in rodents. Male C57BL/6J mice were implanted with bilateral dorsal CA1 guide cannulae to allow for the inactivation of the hippocampus at discrete time points in the task. The results suggest that the rodent hippocampus is crucial to the encoding, consolidation and retrieval of object memory. Next, it was determined that there is a delay-dependent involvement of the hippocampus in object memory, implying that other structures may be supporting the memory prior to the recruitment of hippocampus. In addition, when the context memory and object memory could be further dissociated, by altering the task design, the results imply a necessary role for the hippocampus in the object memory, irrespective of context. Also, making the task more perceptually demanding, by requiring the mice to perform a two-dimensional to three-dimensional association between stimuli, engaged the hippocampus. Then, in the traditional NOR task, long and short training exploration times were imposed to determine brain region activity for weak and strong object memory. The inactivation and immunohistochemistry findings imply weak object memory is perirhinal cortex dependent, while strong object memory is hippocampal-dependent. Taken together, the findings suggest that mice, like humans, process object memory on a continuum from weak to strong, recruiting the hippocampus conditionally for strong familiarity. Confirming this functional similarity between the rodent and human object memory systems could be beneficial for future studies investigating memory disorders.
Show less - Date Issued
- 2016
- PURL
- http://purl.flvc.org/fau/fd/FA00004580
- Subject Headings
- Memory--Research., Mice as laboratory animals., Hippocampus (Brain)--Physiology., Episodic memory., Neurotransmitter receptors., Cellular control mechanisms., Cellular signal transduction., Human information processing.
- Format
- Document (PDF)
- Title
- Between Waves.
- Creator
- Jensen, Rebecca, Schmitt, Kate, Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, Department of English
- Abstract/Description
-
Between Waves is a lyrical memoir that explores the changes I faced in transitioning into American life after growing up in rural England. The book is written in two parts; the first is set mostly in England, the second takes place primarily in Florida. I interweave a present, reflective voice through both parts to challenge the ideas of love, loss, and learning to say goodbye as well as attempting to illustrate how perceptions of each can change over time. The lyrical structure of the memoir...
Show moreBetween Waves is a lyrical memoir that explores the changes I faced in transitioning into American life after growing up in rural England. The book is written in two parts; the first is set mostly in England, the second takes place primarily in Florida. I interweave a present, reflective voice through both parts to challenge the ideas of love, loss, and learning to say goodbye as well as attempting to illustrate how perceptions of each can change over time. The lyrical structure of the memoir allows for swift transition between memories, themes, and locations without limitations of a chronological or linear storyline. The stories detailed throughout the memoir are meditative, subjective perceptions that intend to determine what it means to be a child, a parent, a transplant, and what it means to find home within it all.
Show less - Date Issued
- 2017
- PURL
- http://purl.flvc.org/fau/fd/FA00004833, http://purl.flvc.org/fau/fd/FA00004833
- Subject Headings
- Jensen, Rebecca., Immigrants--United States--Personal narratives., Memory--Social aspects.
- Format
- Document (PDF)
- Title
- A COMPARISON OF TASK RELEVANT NODE IDENTIFICATION TECHNIQUES AND THEIR IMPACT ON NETWORK INFERENCES: GROUP-AGGREGATED, SUBJECT-SPECIFIC, AND VOXEL WISE APPROACHES.
- Creator
- Falco, Dimitri, Bressler, Steven L., Florida Atlantic University, Center for Complex Systems and Brain Sciences, Charles E. Schmidt College of Science
- Abstract/Description
-
The dissertation discusses various node identification techniques as well as their downstream effects on network characteristics using task-activated fMRI data from two working memory paradigms: a verbal n-back task and a visual n-back task. The three node identification techniques examined within this work include: a group-aggregated approach, a subject-specific approach, and a voxel wise approach. The first chapters highlight crucial differences between group-aggregated and subject-specific...
Show moreThe dissertation discusses various node identification techniques as well as their downstream effects on network characteristics using task-activated fMRI data from two working memory paradigms: a verbal n-back task and a visual n-back task. The three node identification techniques examined within this work include: a group-aggregated approach, a subject-specific approach, and a voxel wise approach. The first chapters highlight crucial differences between group-aggregated and subject-specific methods of isolating nodes prior to undirected functional connectivity analysis. Results show that the two techniques yield significantly different network interactions and local network characteristics, despite having their network nodes restricted to the same anatomical regions. Prior to the introduction of the third technique, a chapter is dedicated to explaining the differences between a priori approaches (like the previously introduced group-aggregated and subject-specific techniques) and no a priori approaches (like the voxel wise approach). The chapter also discusses two ways to aggregate signal for node representation within a network: using the signal from a single voxel or aggregating signal across a group of neighboring voxels. Subsequently, a chapter is dedicated to introducing a novel processing pipeline which uses a data driven voxel wise approach to identify network nodes. The novel pipeline defines nodes using spatial temporal features generated by a deep learning algorithm and is validated by an analysis showing that the isolated nodes are condition and subject specific. The dissertation concludes by summarizing the main takeaways from each of the three analyses as well as highlighting the advantages and disadvantages of each of the three node identification techniques.
Show less - Date Issued
- 2020
- PURL
- http://purl.flvc.org/fau/fd/FA00013553
- Subject Headings
- Functional magnetic resonance imaging, Brain mapping, Working memory, Neural networks (Neurobiology), Neuroimaging--methods
- Format
- Document (PDF)
- Title
- Influence of small conductance calcium-activated potassium channels (SK,Kca2) on long-term memory: global and local analysis across time- and task- dependent measures.
- Creator
- Vick, Kyle A., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Small conductance calcium-activated potassium (SK) channels are found ubiquitously throughout the brain and modulate the encoding of learning and memory. Systemic injection of 1-ethyl-2-benzimidalzolinoe (EBIO), a SK channel activator, impairs the encoding of novel object memory and locomotion but spares fear memory encoding in C57BL/6NHsd mice. The memory impairments discovered were not due to non-cognitive performance confounds such as ataxia, anxiety, attention or analgesia. Further...
Show moreSmall conductance calcium-activated potassium (SK) channels are found ubiquitously throughout the brain and modulate the encoding of learning and memory. Systemic injection of 1-ethyl-2-benzimidalzolinoe (EBIO), a SK channel activator, impairs the encoding of novel object memory and locomotion but spares fear memory encoding in C57BL/6NHsd mice. The memory impairments discovered were not due to non-cognitive performance confounds such as ataxia, anxiety, attention or analgesia. Further investigation with intra-hippocampal application of EBIO revealed SK channels in dorsal CA1 contribute to the encoding deficits seen systemically, but do not account for the full extent of the impairment. Concentrated activation of dorsal CA1 SK channels do not influence fear memory encoding or locomotor impairments. Taken together, these data indicate SK channels, especially in the dorsal hippocampus, have a modulatory role on novel object memory encoding, but not retrieval; however, pharmacological activation of hippocampal SK channels does not appear to influence fear memory encoding.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/192991
- Subject Headings
- Mice as laboratory animals, Cellular signal transduction, Memory, Research, Biological transport, Research, Potassium channels, Physiological effect
- Format
- Document (PDF)
- Title
- INVESTIGATING THE NEURAL CIRCUITRY SUPPORTING OBJECT RECOGNITION MEMORY IN C57BL/6J MICE.
- Creator
- Cinalli Jr., David A, Stackman, Jr., Robert W., Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
- Abstract/Description
-
The hippocampus, a brain region that is part of the limbic system in the medial temporal lobe, is critical to episodic memory, or the memory of autobiographical events. The hippocampus plays an important role in the consolidation of information from short-term memory into more permanent long-term memory and spatial memory which enables navigation. Hippocampal damage in humans has been linked to memory loss, such as in Alzheimer’s disease and other dementias, as well as in amnesia such as in...
Show moreThe hippocampus, a brain region that is part of the limbic system in the medial temporal lobe, is critical to episodic memory, or the memory of autobiographical events. The hippocampus plays an important role in the consolidation of information from short-term memory into more permanent long-term memory and spatial memory which enables navigation. Hippocampal damage in humans has been linked to memory loss, such as in Alzheimer’s disease and other dementias, as well as in amnesia such as in the case of patient H.M. The role of the hippocampus has been well characterized in humans but is less understood in rodents due to contradictory findings. While rodents have served well as model organisms in developing our understanding of the cognitive map that is critical for spatial navigation, there has been substantial contention over the degree to which the rodent hippocampus supports non-spatial memory, specifically the memory for items or objects previously encountered. The overall objective of this research is to gain a better understanding of how neuronal circuits involving the hippocampus and perirhinal cortex function to support object memory in the brain. Chemogenetic technologies such as DREADDs (designer receptor exclusively activated by designer drugs) have proven to be effective tools in remote manipulation of neuronal activity. First, a series of behavioral tasks was used to validate the effects of DREADD inactivation in the CA1 region of dorsal hippocampus in C57BL/6J male mice. DREADD inhibition resulted in significant impairment in the spontaneous object recognition (SOR) task and of spatial memory in the Morris water maze. In conjunction, mice were implanted with bilateral perirhinal cortex guide cannulae to allow for temporary muscimol inactivation during distinct time points in the SOR task to further investigate the nature of its relationship with the hippocampus. The results reveal an unexpected role for the perirhinal cortex in the retrieval of strong object memory. Finally, Arc mRNA expression was quantified in CA1 of dorsal hippocampus and perirhinal cortex following both weak and strong object memory formation. The results indicate that the perirhinal cortex and hippocampus have distinct, yet complementary roles in object recognition memory and that distinction is gated by memory strength. Understanding the neural mechanisms supporting the weak-strong object memory distinction in mice is an important step not only in validating mice as a suitable model system to study episodic memory in humans, but also in developing treatments and understanding the underlying causes of diseases affecting long-term memory such as Alzheimer’s disease.
Show less - Date Issued
- 2020
- PURL
- http://purl.flvc.org/fau/fd/FA00013571
- Subject Headings
- Neural circuitry, Hippocampus, Perirhinal Cortex, Memory, Mice, Inbred C57BL
- Format
- Document (PDF)
- Title
- Preserved and deficient calculation processes in Alzheimer's disease and mild cognitive impairment.
- Creator
- Jurado Noboa, Maria Beatriz., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Two skills necessary for the execution of proficient calculation, retrieving arithmetic facts from memory and accessing number magnitude information, were studied in a group of patients diagnosed with Alzheimer's disease (AD), mild cognitive impairment (MCI), and healthy controls to try to elucidate the locus of impairment in AD-related calculation deficits. This was achieved through the use of an arithmetic production task and a number-matching task as measures of explicit and implicit...
Show moreTwo skills necessary for the execution of proficient calculation, retrieving arithmetic facts from memory and accessing number magnitude information, were studied in a group of patients diagnosed with Alzheimer's disease (AD), mild cognitive impairment (MCI), and healthy controls to try to elucidate the locus of impairment in AD-related calculation deficits. This was achieved through the use of an arithmetic production task and a number-matching task as measures of explicit and implicit retrieval of arithmetic facts, and a numerical Stroop task that assesses automatic access to number magnitude representation. AD patients, but not MCI patients, showed high response latencies and a high number of errors when performing multiplications in the production task, and reduced automatic retrieval of arithmetic task in the number-matching task. All participants showed the classic problem-size effect often reported in the mathematical cognition literature. Performance on the numerical Stroop task suggests that access to number magnitude information is relatively resistant to cognitive impairment. ... Results for the AD group are consistent with a pattern of preserved and impaired cognitive processes that might mediate the reported calculation deficits in AD.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3362384
- Subject Headings
- Aging, Psychological aspects, Cognitive psychology, Memory disorders in old age, Alzheimer's disease, Diagnosis, Context effects (Psychology)
- Format
- Document (PDF)
- Title
- The effect of small conductance calcium-activated potassium channels on emotional learning and memory.
- Creator
- Sanguinetti, Shannon, Stackman, Robert W., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Small conductance Ca2+-activated K+ (SK) channels have been shown to alter the encoding of spatial and non-spatial memory in the hippocampus by shaping glutamatergic postsynaptic potentials and modulating NMDA receptor-dependent synaptic plasticity. When activated, dendritic SK channels reduce hippocampal neuronal excitability and LTP. Similar SK channel properties have been demonstrated in lateral amygdala (LA) pyramidal neurons. Additionally, induction of synaptic plasticity and beta...
Show moreSmall conductance Ca2+-activated K+ (SK) channels have been shown to alter the encoding of spatial and non-spatial memory in the hippocampus by shaping glutamatergic postsynaptic potentials and modulating NMDA receptor-dependent synaptic plasticity. When activated, dendritic SK channels reduce hippocampal neuronal excitability and LTP. Similar SK channel properties have been demonstrated in lateral amygdala (LA) pyramidal neurons. Additionally, induction of synaptic plasticity and beta-adrenoreceptor activation in LA pyramidal neurons causes PKA-mediated internalization of SK channels from the postsynaptic density. Chronic activation of the amygdala through repetitive stressful stimuli can lead to excitatory synaptic strengthening that may create permanent hyper-excitability in its circuitry. This mechanism may contribute to a number of mood and anxiety disorders. The selective influence of SK channels in the LA on anxiety and fear conditioning are not known. The thesis project outlined herein examined whether SK channel blockade by bee venom peptide, apamin, during a repetitive acute fear conditioning paradigm was sufficient to alter fear memory encoding and the resulting behavioral outcome. Following the final fear memory test session, mice were tested in the open field immediately after the second fear conditioning test session. The findings indicate that intracranial LA microinfusions of apamin did not affect memory encoding or subsequent anxiety.
Show less - Date Issued
- 2015
- PURL
- http://purl.flvc.org/fau/fd/FA00004543, http://purl.flvc.org/fau/fd/FA00004543
- Subject Headings
- Biological transport -- Research, Cellular signal transduction, Memory -- Research, Mice as laboratory animals, Potassium channels -- Physiological effect
- Format
- Document (PDF)
- Title
- The influence of motion type on memory of simple events.
- Creator
- Berger, Johanna D., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
This experiment investigated an individual's memory of specific motion events, unique actor, intrinsic motion, and extrinsic motion combination. Intrinsic motions involve the movement of an individual's body parts in a specific manner to move around, while extrinsic motions specify a path in reference to an external object. Participants viewed video clips, each depicting an actor performing a unique extrinsic and intrinsic motion combination. One week later, they viewed a different series of...
Show moreThis experiment investigated an individual's memory of specific motion events, unique actor, intrinsic motion, and extrinsic motion combination. Intrinsic motions involve the movement of an individual's body parts in a specific manner to move around, while extrinsic motions specify a path in reference to an external object. Participants viewed video clips, each depicting an actor performing a unique extrinsic and intrinsic motion combination. One week later, they viewed a different series of retrieval video clips consisting of old (identical to encoding), extrinsic conjunction (extrinsic motion previously performed by different actor), intrinsic conjunction (intrinsic motion previously performed by different actor), and new (novel extrinsic or intrinsic motion) video clips. Participants responded "yes" to viewing the old video clips the most often, followed by conjunction video clips, and then new video clips. Furthermore, there were a greater number of "yes" event memory recognition responses for extrinsic conjunction items than intrinsic conjunction items.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/186673
- Subject Headings
- Recollection (Psychology), Context effects (Psychology), Memory, Research, Human information processing, Research, Transference (Psychology), Motion segmentation
- Format
- Document (PDF)
- Title
- Uncovering the role of the rodent dorsal hippocampus in spatial and object memory retrieval.
- Creator
- Rios, Lisa, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Male C7BL/6J mice were implanted with bilateral dorsal CA1 guide cannulae. After confirming that intrahippocampal microinfusion of muscimol impaired hippocampal function, demonstrated by impaired performance in the Morris water maze, the influence of intrahippocampal muscimol was tested in the Novel Object Recognition paradigm. During a test session 24 h after the last habituation/sample session, mice were presented with one familiar object and one novel object. Successful retention of object...
Show moreMale C7BL/6J mice were implanted with bilateral dorsal CA1 guide cannulae. After confirming that intrahippocampal microinfusion of muscimol impaired hippocampal function, demonstrated by impaired performance in the Morris water maze, the influence of intrahippocampal muscimol was tested in the Novel Object Recognition paradigm. During a test session 24 h after the last habituation/sample session, mice were presented with one familiar object and one novel object. Successful retention of object memory was inferred if mice spent more time exploring the novel object than the familiar object. Results demonstrate that muscimol infused into dorsal CA1 region prior to the test session eliminates novel object preference, indicating that the hippocampus is necessary for the retrieval of this non-spatial memory - a topic that has garnered much debate. Understanding the similarities between rodent and human hippocampal function could enable future animal studies to effectively answer questions about diseases and disorders affecting human learning and memory.
Show less - Date Issued
- 2011
- PURL
- http://purl.flvc.org/FAU/3172696
- Subject Headings
- Rodents as laboratory animals, Memory, Research, Cellular signal transduction, Cognitive neuroscience, Hippocampus (Brain), Space perception
- Format
- Document (PDF)
- Title
- Uncounted cadences: tracing memory through movement.
- Creator
- Lavetsky, Jill., Dorothy F. Schmidt College of Arts and Letters, Department of Visual Arts and Art History
- Abstract/Description
-
Uncounted Cadences is a drawing installation in the thesis exhibition that furthers my exploration in tracing movement through psychological and physical geographies. Gestural drawings of human and animal bodies in motion are woven into local landscape imagery that is printed with powdered charcoal through a silkscreen. Using both additive and subtractive processes, the layering and erasure suggest loss, reclamation, and the nature of memory. The drawings are cut and provisionally reassembled...
Show moreUncounted Cadences is a drawing installation in the thesis exhibition that furthers my exploration in tracing movement through psychological and physical geographies. Gestural drawings of human and animal bodies in motion are woven into local landscape imagery that is printed with powdered charcoal through a silkscreen. Using both additive and subtractive processes, the layering and erasure suggest loss, reclamation, and the nature of memory. The drawings are cut and provisionally reassembled into a cinematic sequence as if they are pieces of film being edited and spliced. This process shows an unfolding over time and involves listening to the rhythmic pacing of bodies morphing, decaying, birthing, or leaving. Time is not experienced as progress ; rather, the rearrangement of fragments allows for a continuous retelling of stories.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3360796
- Subject Headings
- Memory, Visual art, Art, Modern, Themes, motives, etc, Repetitive patterns (Decorative arts)
- Format
- Document (PDF)
- Title
- Only sound remains.
- Creator
- Filsoofi, Raheleh T., McConnell, Brian E., Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, Department of Visual Arts and Art History
- Abstract/Description
-
We each experience the world through the prism of our upbringing, our traditions and the familiar sights and sounds embedded deep within our soul. Only Sound Remains is an installation in which I explore and share those experiences through objects, sounds and video. Ceramic vessels inspired by the traditions of my ancestors hide and shape sounds that narrate simple and complex experiences, which are the stories of my life. The sounds relate to the world that I came from and that still can be...
Show moreWe each experience the world through the prism of our upbringing, our traditions and the familiar sights and sounds embedded deep within our soul. Only Sound Remains is an installation in which I explore and share those experiences through objects, sounds and video. Ceramic vessels inspired by the traditions of my ancestors hide and shape sounds that narrate simple and complex experiences, which are the stories of my life. The sounds relate to the world that I came from and that still can be heard now. The sounds are not clear until one gets close to the vessels and lifts the lid-- a bazaar, praying, marching, an explosion, a woman telling a story, traditional Iranian music. The installation is a metaphor for the way in which we experience the world. The vessels represent a selection of personal and cultural experiences through sounds that may or may not be fully understood.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00004108, http://purl.flvc.org/fau/fd/FA00004108
- Subject Headings
- Iran -- Social life and customs, Memory -- Social aspects, Music -- Philosophy and aesthetics, Symbolism in literature
- Format
- Document (PDF)
- Title
- THE INFLUENCE OF MENTAL, PHYSICAL, AND SOCIAL ACTIVITY ON EPISODIC MEMORY OF PERSONS AGED 50 AND ABOVE IN THE UNITED STATES.
- Creator
- Malatyali, Ayse, Gordon, Shirley C., Florida Atlantic University, Christine E. Lynn College of Nursing, Christine E. Lynn College of Nursing
- Abstract/Description
-
The purpose of this study was to describe the relationship between mental, physical, and social activity, and episodic memory (EM) of cognitively intact older persons. The specific aims were (a) to describe the relationship between EM and mental, physical, and social activity, (b) to describe the role of gender, marital status, and race on EM, (c) to describe the moderating effects of each activity on the relationship between each of the remaining two activities and EM, and (d) to describe...
Show moreThe purpose of this study was to describe the relationship between mental, physical, and social activity, and episodic memory (EM) of cognitively intact older persons. The specific aims were (a) to describe the relationship between EM and mental, physical, and social activity, (b) to describe the role of gender, marital status, and race on EM, (c) to describe the moderating effects of each activity on the relationship between each of the remaining two activities and EM, and (d) to describe the moderating effects of gender, marital status, and race on the relationship between each activity and EM. Two theoretical frameworks: Cognitive Reserve Theory (Stern, 2002) and Theory of Nursing as Caring (Boykin & Schoenhofer, 1993) guided the study. This study was designed as a correlational and retrospective secondary analysis of data sets from the Health and Retirement Study. The sample consisted of 3,903 cognitively intact persons who were 50 years and older and completed immediate and delayed recall tests in the 2016 HRS and the 2015 Consumptions and Activities Mail Survey. Descriptive statistics included the means for age: 67 (SD 9.54), education:13.85 (SD 5.89), and total cognition 16.86 (SD 3.11). The sample was predominantly Caucasian (78.3%), female (59.8%), and married (60.9%).
Show less - Date Issued
- 2020
- PURL
- http://purl.flvc.org/fau/fd/FA00013564
- Subject Headings
- Older people--United States, Episodic memory, Cognition--Aged, Lifestyles--Health aspects
- Format
- Document (PDF)
- Title
- Effects of Age on Children's Binding of Actors With Actions.
- Creator
- Spirgel, Arie, Kersten, Alan, Florida Atlantic University
- Abstract/Description
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In the current experiment, a group of 10-year-olds and a group of young adults watched a series of short video clips of different women performing different actions. One week later, participants were tested on their ability to discriminate the old videos from distracter videos, which included new actor/old action videos, new action/old actor videos, novel combinations of familiar actors and actions, as well as entirely new videos. The results provide evidence that the ability to accurately...
Show moreIn the current experiment, a group of 10-year-olds and a group of young adults watched a series of short video clips of different women performing different actions. One week later, participants were tested on their ability to discriminate the old videos from distracter videos, which included new actor/old action videos, new action/old actor videos, novel combinations of familiar actors and actions, as well as entirely new videos. The results provide evidence that the ability to accurately bind actors with their actions reaches adult levels by age 10. The results are discussed in terms of the brain areas involved in memory binding tasks, as well as implications for various areas of study within forensic psychology, particularly unconscious transference.
Show less - Date Issued
- 2007
- PURL
- http://purl.flvc.org/fau/fd/FA00000836
- Subject Headings
- Transference (Psychology), Cognition--Age factors, Memory--Age factors, Recognition (Psychology)
- Format
- Document (PDF)
- Title
- Effects of prenatal exposure to cocaine on memory for sex-typed event sequences by preschool children.
- Creator
- Iskandar, Niveen, Florida Atlantic University, Terry, Leslie M., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Cocaine use during pregnancy has been associated with neurobehavioral and cognitive difficulties in infants and toddlers. The present study used an elicited imitation procedure to investigate memory for sex-typed event sequences in preschool children. Measures of immediate and delayed recall was assessed in three groups of children: drug-exposed, at-risk, and not-at-risk. Results indicated that (1) drug-exposed males showed no evidence of demasculinization and/or feminization, (2) drug...
Show moreCocaine use during pregnancy has been associated with neurobehavioral and cognitive difficulties in infants and toddlers. The present study used an elicited imitation procedure to investigate memory for sex-typed event sequences in preschool children. Measures of immediate and delayed recall was assessed in three groups of children: drug-exposed, at-risk, and not-at-risk. Results indicated that (1) drug-exposed males showed no evidence of demasculinization and/or feminization, (2) drug-exposed children, in general, did not recall a fewer number of different target acts or fewer actions in the correct order than the at-risk or not-at-risk children, and (3) drug-exposed and at-risk children exhibited a greater number of repetition errors and novel errors than not-at-risk children. Findings suggest that certain effects of prenatal drug exposure are still evident in children of preschool age.
Show less - Date Issued
- 1999
- PURL
- http://purl.flvc.org/fcla/dt/15700
- Subject Headings
- Cocaine--Physiological effect, Children of prenatal substance abuse--Development, Memory in children
- Format
- Document (PDF)
- Title
- Delta service extensions to a mobile file system cache.
- Creator
- Blake, Wil., Florida Atlantic University, Mahgoub, Imad
- Abstract/Description
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In this thesis, a delta service extends a mobile file system cache in order to minimize the amount of data transferred over wireless communications links. Network bandwidth stands as one of the resource limitations impacting the design of mobile computer applications. At the mobile file system service level, caching and compression provide resource conservation in distributed applications. This thesis proposes a delta service to enhance caching services characteristic of mobile computer file...
Show moreIn this thesis, a delta service extends a mobile file system cache in order to minimize the amount of data transferred over wireless communications links. Network bandwidth stands as one of the resource limitations impacting the design of mobile computer applications. At the mobile file system service level, caching and compression provide resource conservation in distributed applications. This thesis proposes a delta service to enhance caching services characteristic of mobile computer file systems. Well established a mechanisms for sequence comparison and software configuration management, file deltas have applicability to mobile computer and distributed file system caching environments. Study of the delta service uses trace-driven simulation methodology incorporating traces obtained in a real world distributed environment. A mobile computer client cache model will corroborate existing studies regarding suitable cache size for disconnected client operation. A delta service model will extend the mobile computer client cache model of various cache sizes in order to gauge the bandwidth savings on the link obtained by the delta service.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15233
- Subject Headings
- File organization (Computer science), Computer terminals--Remote terminals, Cache memory, Mobile computing
- Format
- Document (PDF)
- Title
- A fault-tolerant memory architecture for storing one hour of D-1 video in real time on long polyimide tapes.
- Creator
- Monteiro, Pedro Cox de Sousa., Florida Atlantic University, Glenn, William E., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
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Research is under way to fabricate large-area thin-film transistor arrays produced on a thin polyimide substrate. The polyimide substrate is available in long thirty centimeter wide rolls of tape, and lithography hardware is being developed to expose hundreds of meters of this tape with electrically addressable light modulators which can resolve 2 $\mu$m features. A fault-tolerant memory architecture is proposed that is capable of storing one hour of D-1 component digital video (almost 10^12...
Show moreResearch is under way to fabricate large-area thin-film transistor arrays produced on a thin polyimide substrate. The polyimide substrate is available in long thirty centimeter wide rolls of tape, and lithography hardware is being developed to expose hundreds of meters of this tape with electrically addressable light modulators which can resolve 2 $\mu$m features. A fault-tolerant memory architecture is proposed that is capable of storing one hour of D-1 component digital video (almost 10^12 bits) in real-time, on eight two-hundred meter long tapes. Appropriate error correcting codes and error concealment are proposed to compensate for drop-outs resulting from manufacturing defects so as to yield video images with error rates low enough to survive several generations of copies.
Show less - Date Issued
- 1992
- PURL
- http://purl.flvc.org/fcla/dt/14869
- Subject Headings
- Polyimides, Computer architecture, Memory hierarchy (Computer science), Fault-tolerant computing
- Format
- Document (PDF)
- Title
- Memory for emotional and non-emotional events.
- Creator
- Butler, Leslie A., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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This experiment was designed to investigate the effect of emotion on an individual's ability to bind actors and actions in memories for events. Binding is the process of creating associations among features of a stimulus in order to represent that they belong together; however, errors can occur when a feature from one stimulus is incorrectly associated with a feature from another stimulus. Participants viewed a series of video clips, each depicting an actor performing a simple emotional or...
Show moreThis experiment was designed to investigate the effect of emotion on an individual's ability to bind actors and actions in memories for events. Binding is the process of creating associations among features of a stimulus in order to represent that they belong together; however, errors can occur when a feature from one stimulus is incorrectly associated with a feature from another stimulus. Participants viewed a series of video clips, each depicting an actor performing a simple emotional or non-emotional action. One week later, they viewed a series of retrieval video clips consisting of old, (previously seen), conjunction (previously seen action performed by a different actor) and also new video clips. Participants responded "yes" to viewing the old clips the most, followed by both conjunction clips, and then new clips. Participants also responded "yes" more often to emotional items and also displayed higher confidence ratings to "yes" responses for emotional items.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/221946
- Subject Headings
- Recollection (Psychology), Memory, Physiological effects, Emotions, Physiological effects, Emotion and cognition
- Format
- Document (PDF)
