Abstract:
:Sensory systems change their sensitivity based on recent stimuli to adjust their response range to the range of inputs and to predict future sensory input. Here, we report the presence of retinal ganglion cells that have antagonistic plasticity, showing central adaptation and peripheral sensitization. Ganglion cell responses were captured by a spatiotemporal model with independently adapting excitatory and inhibitory subunits, and sensitization requires GABAergic inhibition. Using a simple theory of signal detection, we show that the sensitizing surround conforms to an optimal inference model that continually updates the prior signal probability. This indicates that small receptive field regions have dual functionality--to adapt to the local range of signals but sensitize based upon the probability of the presence of that signal. Within this framework, we show that sensitization predicts the location of a nearby object, revealing prediction as a functional role for adapting inhibition in the nervous system.
journal_name
Neuronjournal_title
Neuronauthors
Kastner DB,Baccus SAdoi
10.1016/j.neuron.2013.06.011subject
Has Abstractpub_date
2013-08-07 00:00:00pages
541-54issue
3eissn
0896-6273issn
1097-4199pii
S0896-6273(13)00527-8journal_volume
79pub_type
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