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Retinal adaptation to object motion
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DOI：10.1016/j.neuron.2007.09.030.png)
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摘要
En 中文
Due to fixational eye movements, the image on the retina is always in motion, even when one views a stationary scene. When an object moves within the scene, the corresponding patch of retina experiences a different motion trajectory than the surrounding region. Certain retinal ganglion cells respond selectively to this condition, when the motion in the cell's receptive field center is different from that in the surround. Here we show that this response is strongest at the very onset of differential motion, followed by gradual adaptation with a time course of several seconds. Different subregions of a ganglion cell's receptive field can adapt independently. The circuitry responsible for differential motion adaptation lies in the inner retina. Several candidate mechanisms were tested, and the adaptation most likely results from synaptic depression at the synapse from bipolar to ganglion cell. Similar circuit mechanisms may act more generally to emphasize novel features of a visual stimulus.
Keyword:
TEMPORAL CONTRAST ADAPTATION
VISUAL CORTICAL-NEURONS
GANGLION-CELLS
BIPOLAR CELLS
SELECTIVE ADAPTATION
VARIANCE ADAPTATION
SYNAPTIC DEPRESSION
TIME-COURSE
IN-VIVO
SALAMANDER
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期刊
IF:
15
论文数:
1.4W
被引数:
9.9W
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