Elsevier

Vision Research

Volume 36, Issue 1, January 1996, Pages 19-26
Vision Research

Disproportionate distribution of field potentials across the toad's tectal visual map in response to diffuse light ON and OFF stimulations

https://doi.org/10.1016/0042-6989(95)00116-HGet rights and content
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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

Keywords

Optic tectum
Visual map
ON/OFF stimulation
Field potentials
Disproportionate representations Bufo bufo spinosus
Bufo marinus

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