Document Detail

A neural pathway for the shift response in the cat.
MedLine Citation:
PMID:  4005608     Owner:  NLM     Status:  MEDLINE    
The shift response (McIlwain effect) was elicited by moving a large grating situated greater than 15 degrees from the conventional receptive field center (RFC). We examined the change in the amplitude of the shift response induced by placing a steady target on the RFC or the RF surround. We found that appropriate stimulation of the RFC or the RF surround will increase and inappropriate stimulation will decrease the amplitude of the shift response in a graded manner. The amplitude of the shift response was not correlated with the maintained activity but was correlated with the transient peak firing rate which is evoked by flashing the enhancing stimulus. A shift stimulus which elicits a strong shift response can be blocked by inappropriate stimulation. The results suggest that the shift signal is modulating a tonic signal which is present in the RF. Because the shift response is a transient excitation, we suggest that the shift response results from a disinhibitory process. A possible neural pathway for the shift response is presented.
D I Hamasaki; G W Maguire
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Brain research     Volume:  337     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1985 Jun 
Date Detail:
Created Date:  1985-08-21     Completed Date:  1985-08-21     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  51-8     Citation Subset:  IM    
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MeSH Terms
Evoked Potentials, Visual*
Form Perception / physiology*
Photic Stimulation
Retina / cytology,  physiology*
Retinal Ganglion Cells / physiology*
Visual Fields
Visual Pathways / physiology*
Grant Support

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