Simple integration of fast excitation and offset, delayed inhibition computes directional selectivity in Drosophila
نویسندگان
چکیده
منابع مشابه
Directional Selectivity Is Formed at Multiple Levels by Laterally Offset Inhibition in the Rabbit Retina
The excitatory and inhibitory inputs to directionally selective (DS) ganglion cells are themselves directionally selective. Directionality is achieved because excitation is reduced during null-direction movement along a GABAergic pathway. Inhibition is reduced during preferred-direction movement along a pathway that includes cholinergic synapses. Both excitation and inhibition are made directio...
متن کاملDirection Selectivity of Excitation and Inhibition in Simple Cells of the Cat Primary Visual Cortex
Direction selectivity in simple cells of primary visual cortex, defined from their spike responses, cannot be predicted using linear models. It has been suggested that the shunting inhibition evoked by visual stimulation is responsible for the nonlinear component of direction selectivity. Cortical inhibition would suppress a neuron's firing when stimuli move in the nonpreferred direction, but w...
متن کاملDirectional selectivity in the simple eye of an insect.
Among other sensory modalities, flight stabilization in insects is performed with the aid of visual feedback from three simple eyes (ocelli). It is thought that each ocellus acts as a single wide-field sensor that detects changes in light intensity. We challenge this notion by providing evidence that, when light-adapted, the large retinal L-neurons in the median ocellus of the dragonfly respond...
متن کاملDirectional Selectivity
Directional selectivity refers to a neuron’s ability to produce substantially different responses for stimulus motions of different direction. A directionally selective (DS) cell will fire many spikes in response to object motion in one direction (the preferred direction) while responding weakly, if at all, for motion in the opposite (null) direction. This directional “trigger feature” is often...
متن کاملDirectional selectivity and spatiotemporal structure of receptive fields of simple cells in cat striate cortex.
1. Simple cells in cat striate cortex were studied with a number of stimulation paradigms to explore the extent to which linear mechanisms determine direction selectivity. For each paradigm, our aim was to predict the selectivity for the direction of moving stimuli given only the responses to stationary stimuli. We have found that the prediction robustly determines the direction and magnitude o...
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ژورنال
عنوان ژورنال: Nature Neuroscience
سال: 2018
ISSN: 1097-6256,1546-1726
DOI: 10.1038/s41593-017-0046-4