Unbalanced synaptic inhibition can create intensity-tuned auditory cortex neurons

Details Unbalanced synaptic inhibition can create intensity-tuned auditory cortex neurons Unbalanced synaptic inhibition can create intensity-tuned auditory cortex neurons

2006-07-21

arxiv.org/abs/q-bio/0607036v1

Neuroscience 146: 449-462 (2007)

Biology

Quantitative Biology

Neurons and Cognition

22 pages, 5 figures

Scientific paper

10.1016/j.neuroscience.2007.01.0

Intensity-tuned auditory cortex neurons may be formed by intensity-tuned synaptic excitation. Synaptic inhibition has also been shown to enhance, and possibly even create intensity-tuned neurons. Here we show, using in vivo whole cell recordings in pentobarbital-anesthetized rats, that some intensity-tuned neurons are indeed created solely through disproportionally large inhibition at high intensities, without any intensity-tuned excitation. Since inhibition is essentially cortical in origin, these neurons provide examples of auditory feature-selectivity arising de novo at the cortex.

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