| Cortical networks produce three distinct 7-12 Hz rhythms during single sensory responses in the awake rat. | |
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MedLine Citation:
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PMID: 20335467 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cortical rhythms in the alpha/mu frequency range (7-12 Hz) have been variously related to "idling," anticipation, seizure, and short-term or working memory. This overabundance of interpretations suggests that sensory cortex may be able to produce more than one (and even more than two) distinct alpha/mu rhythms. Here we describe simultaneous local field potential and single-neuron recordings made from primary sensory (gustatory) cortex of awake rats and reveal three distinct 7-12 Hz de novo network rhythms within single sessions: an "early," taste-induced approximately 11 Hz rhythm, the first peak of which was a short-latency gustatory evoked potential; a "late," significantly lower-frequency (approximately 7 Hz) rhythm that replaced this first rhythm at approximately 750-850 ms after stimulus onset (consistently timed with a previously described shift in taste temporal codes); and a "spontaneous" spike-and-wave rhythm of intermediate peak frequency (approximately 9 Hz) that appeared late in the session, as part of a oft-described reduction in arousal/attention. These rhythms proved dissociable on many grounds: in addition to having different peak frequencies, amplitudes, and shapes and appearing at different time points (although often within single 3 s snippets of activity), the early and late rhythms proved to have completely uncorrelated session-to-session variability, and the spontaneous rhythm affected the early rhythm only (having no impact on the late rhythm). Analysis of spike-to-wave coupling suggested that the early and late rhythms are a unified part of discriminative taste process: the identity of phase-coupled single-neuron ensembles differed from taste to taste, and coupling typically lasted across the change in frequency. These data reveal that even rhythms confined to a narrow frequency band may still have distinct properties. |
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Authors:
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Adriano B L Tort; Alfredo Fontanini; Mark A Kramer; Lauren M Jones-Lush; Nancy J Kopell; Donald B Katz |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The Journal of neuroscience : the official journal of the Society for Neuroscience Volume: 30 ISSN: 1529-2401 ISO Abbreviation: J. Neurosci. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-25 Completed Date: 2010-04-20 Revised Date: 2012-04-09 |
Medline Journal Info:
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Nlm Unique ID: 8102140 Medline TA: J Neurosci Country: United States |
Other Details:
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Languages: eng Pagination: 4315-24 Citation Subset: IM |
Affiliation:
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Edmond and Lily Safra International Institute of Neuroscience of Natal and Federal University of Rio Grande do Norte, Natal, RN 59066, Brazil. tort@natalneuro.org.br |
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| MeSH Terms | |
Descriptor/Qualifier:
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Action Potentials
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physiology Afferent Pathways / physiology Alpha Rhythm* Animals Female Fourier Analysis Neurons / physiology Rats Rats, Long-Evans Reaction Time / physiology Somatosensory Cortex / anatomy & histology, physiology* Taste / physiology* Theta Rhythm* Time Factors Wakefulness / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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R01 DC006666-06/DC/NIDCD NIH HHS; R01 DC006666-07/DC/NIDCD NIH HHS; R01 DC007703-04/DC/NIDCD NIH HHS; R01 DC007703-07/DC/NIDCD NIH HHS; R01-DC-007102/DC/NIDCD NIH HHS; R03-DC-008885/DC/NIDCD NIH HHS |
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