Disproportionate distribution of field potentials across the toad's tectal visual map in response to diffuse light ON and OFF stimulations.
Vision Res
; 36(1): 19-26, 1996 Jan.
Article
in En
| MEDLINE
| ID: mdl-8746239
ABSTRACT
In toads Bufo marinus and Bufo bufo spinosus, field potentials (FPs) were recorded from the surface of the optic tectum at different sites of the visual map in response to a sudden diffuse darkening (OFF) and lightening (ON) of the visual field of the contralateral eye. The OFF and ON responses were differently pronounced or even failed to occur. The latency of the former was significantly less than the one of the latter. FP amplitudes of the OFF and ON responses were strongest in the representation of a horizonto-superior anterio-lateral portion of the visual field and weakest toward the posterior field of vision. This phenomenon suggests various interpretations for subsequent experiments.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bufo bufo
/
Bufo marinus
/
Visual Fields
/
Superior Colliculi
Limits:
Animals
Language:
En
Journal:
Vision Res
Year:
1996
Document type:
Article
Affiliation country:
Germany