State-dependent modulation of time-varying gustatory responses.

State-dependent modulation of time-varying gustatory responses. Research Abstract Details 

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State-dependent modulation of time-varying gustatory responses. Abstract Text:

Sensory processing is modulated by attention, which is a function of network states. Here we show that changes in such states do more than a simple gating of stimuli: they actually re-arrange cortical coding space to emphasize emotional valences. We delivered taste stimuli to rats before and after a spontaneous state change ("disengagement") that is associated with a reduction in attention and a concurrent emergence of cortical mu rhythms. The percentage of cortical neurons that responded to tastes, and the average response across neurons, remained stable with disengagement, but the particulars of the responses changed drastically. The distinctiveness of sucrose and quinine-which represent the high and low ends of the palatability spectrum-increased, the distinctiveness of the two aversive tastes (quinine and citric acid) decreased, and the distinctiveness of sucrose and NaCl, which were almost identically palatable to start with, did not change. Overall, then, the changes appeared to be palatability-specific. Two additional findings were consistent with this conclusion: rats' palatability-related behavioral responses to the tastes changed in similar ways with disengagement and disengagement-related neural changes specifically appeared late in the response, when palatability-specific information emerges in cortical responses. These data suggest that neural state changes can change the content of neural codes.

State-dependent modulation of time-varying gustatory responses. Publishing Authors By Initials

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State-dependent modulation of time-varying gustatory responses. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of neurophysiology

VOLUME: 96

Page Numbers: 3183-93

Journal Abbreviation: J. Neurophysiol.

ISSN: 0022-3077

DAY: 23

MONTH: 08

YEAR: 2006

State-dependent modulation of time-varying gustatory responses. Information

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LANGUAGE: eng

NlmUniqueID: 375404

State-dependent modulation of time-varying gustatory responses. Keywords Mesh Terms:

KEYWORDS: Time Factors

MESH TERMS: physiology

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Grant and Affiliation Information for State-dependent modulation of time-varying gustatory responses.

AFFILIATION: Volen National Center for Complex Systems, MS 013, Brandeis University, 415 South Street, Waltham, MA 02454, USA. alfredof@brandeis.edu

Country: United States

AGENCY: United States NIDCD

GRANT: DC 007102

ACRONYM: DC

MEDLINETA: J Neurophysiol

REFSOURCE: J Neurophysiol. 2006 Dec;96(6):2844

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