Document Detail

Balanced interactions in ganglion-cell receptive fields.
MedLine Citation:
PMID:  10367966     Owner:  NLM     Status:  MEDLINE    
Receptive fields of retinal ganglion cells in turtle have excitatory and inhibitory components that are balanced along the dimensions of wavelength, functional ON and OFF responses, and spatial assignments of center and surround. These components were analyzed by spectral light adaptations and by the glutamate agonist, 2-amino-4-phosphonobutyric acid (APB). Extracellular recordings to stationary and moving spots of light were used to map changes in receptive fields. ON spike counts minus OFF spike counts, derived from flashed stationary light spots, quantified functional shifts by calculating normalized mean response modulations. The data show that receptive fields are not static, but rather are dynamic arrangements which depend on linked, antagonistic balances among the three dimensions of wavelength, ON and OFF response functions, and center/surround areas.
A M Granda; J R Dearworth; B Subramaniam
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Visual neuroscience     Volume:  16     ISSN:  0952-5238     ISO Abbreviation:  Vis. Neurosci.     Publication Date:    1999 Mar-Apr
Date Detail:
Created Date:  1999-07-02     Completed Date:  1999-07-02     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8809466     Medline TA:  Vis Neurosci     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  319-32     Citation Subset:  IM    
Department of Biological Sciences, University of Delaware, Newark 19716, USA.
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MeSH Terms
Action Potentials / physiology
Aminobutyric Acids / pharmacology
Dark Adaptation
Excitatory Amino Acid Agonists / pharmacology
Photic Stimulation
Retinal Ganglion Cells / drug effects,  physiology*
Turtles / physiology*
Visual Perception / physiology*
Reg. No./Substance:
0/Aminobutyric Acids; 0/Excitatory Amino Acid Agonists; 6323-99-5/2-amino-4-phosphonobutyric acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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