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Immune dysfunction in Atlantic bottlenose dolphins (Tursiops truncatus) with lobomycosis
Title
Immune dysfunction in Atlantic bottlenose dolphins (Tursiops truncatus) with lobomycosis.
Creator
Reif, John S., Peden-Adams, Margie M., Romano, Tracy A., Rice, Charles D., Fair, Patricia A., Bossart, Gregory D., Harbor Branch Oceanographic Institute
Date Issued
2009
PURL
http://purl.flvc.org/fau/fd/FA00007161
Subject Headings
Bottlenose dolphin--Atlantic Coast (U.S.), Lobomycosis, Immunodeficiency, Tursiops truncatus, Lacazia
Format
Document (PDF)
Time-frequency classification of gamma oscillatory activity in the frontoparietal system during working memory
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.
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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)
Hematological, biochemical, and immunological findings in Atlantic bottlenose dolphins (Tursiops truncatus) with orogenital papillomas
Title
Hematological, biochemical, and immunological findings in Atlantic bottlenose dolphins (Tursiops truncatus) with orogenital papillomas.
Creator
Bossart, Gregory D., Romano, Tracy A., Peden-Adams, Margie M., Rice, Charles D., Fair, Patricia A., Goldstein, Juli D., Kilpatrick, David, Cammen, Kristina, Reif, John S., Harbor Branch Oceanographic Institute
Date Issued
2008
PURL
http://purl.flvc.org/FCLA/DT/1587653
Subject Headings
Bottlenose dolphin --Research --United States, Bottlenose dolphin, Veterinary microbiology, Bottlenose dolphin --Diseases
Format
Document (PDF)