Document Detail


Inhibition of sustained gamma oscillations (35-80 Hz) by fast transient responses in cat visual cortex.
MedLine Citation:
PMID:  8650228     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Interactions between stimulus-induced oscillations (35-80 Hz) and stimulus-locked nonoscillatory responses were investigated in the visual cortex areas 17 and 18 of anaesthetized cats. A single square-wave luminance grating was used as a visual stimulus during simultaneous recordings from up to seven electrodes. The stimulus movement consisted of a superposition of a smooth movement with a sequence of dynamically changing accelerations. Responses of local groups of neurons at each electrode were studied on the basis of multiple unit activity and local slow field potentials (13-120 Hz). Oscillatory and stimulus-locked components were extracted from multiple unit activity and local slow field potentials and quantified by a combination of temporal and spectral correlation methods. We found fast stimulus-locked components primarily evoked by sudden stimulus accelerations, whereas oscillatory components (35-80 Hz) were induced during slow smooth movements. Oscillations were gradually reduced in amplitude and finally fully suppressed with increasing amplitudes of fast stimulus-locked components. It is argued that suppression of oscillations is necessary to prevent confusion during sequential processing of stationary and fast changing retinal images.
Authors:
W Kruse; R Eckhorn
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  93     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  1996 Jun 
Date Detail:
Created Date:  1996-07-25     Completed Date:  1996-07-25     Revised Date:  2010-09-14    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  6112-7     Citation Subset:  IM    
Affiliation:
Department of Biophysics, Phillips-University, Marburg, Germany.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cats
Evoked Potentials, Visual
Eye Movements / physiology
Photic Stimulation
Visual Cortex / physiology*
Comments/Corrections

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