A centrifugally controlled circuit in the avian retina and its possible role in visual attention switching.

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Ressource 1Download: serval:BIB_25A7D00A0FD2.P001 (597.38 [Ko])
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Serval ID
serval:BIB_25A7D00A0FD2
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
A centrifugally controlled circuit in the avian retina and its possible role in visual attention switching.
Journal
Visual Neuroscience
Author(s)
Clarke P.G.H., Gyger M., Catsicas S.
ISSN
0952-5238[print], 0952-5238[linking]
Publication state
Published
Issued date
1996
Volume
13
Number
6
Pages
1043-1048
Language
english
Abstract
The isthmo-optic nucleus (ION) is the main source of efferents to the retina in birds. Isthmo-optic neurons project in topographical order on amacrine cells in the ventral parts of the retina, and a subclass of these known as proprioretinal neurons project onto the dorsal retina. We propose that, through the intermediary of the amacrine target cells, activity in the isthmo-optic pathway excites ganglion cells locally in the ventral retina but inhibits those in dorsal regions. This circuit would thereby mediate centrifugally controlled switches in attention between the dorsal retina, involved in feeding, and the more ventral parts, involved in scanning for predators. This hypothesis accounts for a wide range of disparate data from behavior, comparative anatomy, endocrinology, hodology, and neurophysiology.
Keywords
Animals, Attention/physiology, Chickens/physiology, Fixation, Ocular/physiology, Nerve Fibers/physiology, Quail/physiology, Retina/physiology, Superior Colliculi/physiology, Visual Pathways/physiology, Visual Perception/physiology
Pubmed
Web of science
Open Access
Yes
Create date
20/01/2008 18:49
Last modification date
01/10/2019 7:17
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