The Statistical Computation Underlying Contrast Gain Control
نویسندگان
چکیده
منابع مشابه
The statistical computation underlying contrast gain control.
In the early visual system, a contrast gain control mechanism sets the gain of responses based on the locally prevalent contrast. The measure of contrast used by this adaptation mechanism is commonly assumed to be the standard deviation of light intensities relative to the mean (root-mean-square contrast). A number of alternatives, however, are possible. For example, the measure of contrast mig...
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Recent neurophysiological experiments have revealed that the linear and nonlinear kernels of the transfer function in sensory neurons are not static. Rather, they are adaptive to the contrast or the variance of time-varying input stimuli, exhibiting a contrast gain control phenomenon. We investigated the underlying biophysical causes of this phenomenon by simulating and analyzing the leaky inte...
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Contrast adaptation that was limited to a small region of the peripheral retina was induced as observers viewed a multiple depth-plane textured surface. The small region undergoing contrast adaptation was present only in one depth-plane to determine whether contrast gain-control is depth-dependent. After adaptation, observers performed a contrast-matching task in both the adapted and a non-adap...
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Binaural integration in the central nucleus of inferior colliculus (ICC) plays a critical role in sound localization. However, its arithmetic nature and underlying synaptic mechanisms remain unclear. Here, we showed in mouse ICC neurons that the contralateral dominance is created by a "push-pull"-like mechanism, with contralaterally dominant excitation and more bilaterally balanced inhibition. ...
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I present a simulation of contrast gain control mechanisms operating among transient M cells in the monkey s retina in order to investigate the spatial consequences of this interaction The simulation stages include a realistic viewing model non linear receptor model linear spatial ltering and a saturating output function Contrast gain control is introduced by pooling recti ed signals from on an...
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ژورنال
عنوان ژورنال: Journal of Neuroscience
سال: 2006
ISSN: 0270-6474,1529-2401
DOI: 10.1523/jneurosci.0284-06.2006