The nucleus of the optic tract of the opossum
Rev. bras. biol
; 56(supl.1,pt.2): 373-80, dez. 1996. ilus
Article
em En
| LILACS
| ID: lil-196354
Biblioteca responsável:
BR1.1
RESUMO
This paper reviews anatomical and electrophysiological data on the nucleus of the optic tract (NOT) of the opossum, a nucleus in the afferent branch of the horizontal optokinetic reflex. It is proposed that subcortical routes are essential for responses from the two eyes a direct retinal projection from the contralateral eye and a commissural pathway between the two NOTs for the ipsolateral eye. In the latter case there's evidence that the commisural axons have a relay on inhibitory neurones. This circuit accounts for the differences in response pattern under monocular condition temporo-nasal motion of the visual stimulus elicits excitation in the contralateral NOT, resulting in inhibition of the ipsolateral nucleus, while naso-temporal motion promotes inhibition in the contralateral nucleus, releasing the ipsolateral nucleus from the commissural input.
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Índice:
LILACS
Assunto principal:
Gambás
/
Nistagmo Optocinético
Limite:
Animals
Idioma:
En
Revista:
Rev. bras. biol
Assunto da revista:
BIOLOGIA
Ano de publicação:
1996
Tipo de documento:
Article
/
Congress and conference