Multiplexed computations in retinal ganglion cells of a single type
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Author
Deny, Stephane;
Ferrari, Ulisse;
Mace, Emilie;
Yger, Pierre;
Caplette, Romain;
Picaud, Serge;
Tkacik, GasperISTA
;
Marre, Olivier

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Abstract
In the early visual system, cells of the same type perform the same computation in different places of the visual field. How these cells code together a complex visual scene is unclear. A common assumption is that cells of a single-type extract a single-stimulus feature to form a feature map, but this has rarely been observed directly. Using large-scale recordings in the rat retina, we show that a homogeneous population of fast OFF ganglion cells simultaneously encodes two radically different features of a visual scene. Cells close to a moving object code quasilinearly for its position, while distant cells remain largely invariant to the object's position and, instead, respond nonlinearly to changes in the object's speed. We develop a quantitative model that accounts for this effect and identify a disinhibitory circuit that mediates it. Ganglion cells of a single type thus do not code for one, but two features simultaneously. This richer, flexible neural map might also be present in other sensory systems.
Publishing Year
Date Published
2017-12-06
Journal Title
Nature Communications
Publisher
Nature Publishing Group
Volume
8
Issue
1
Article Number
1964
ISSN
IST-REx-ID
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