A team of University of Oregon researchers have isolated an independent processing channel of synapses inside the brain's auditory cortex that deals specifically with shutting off sound processing at appropriate times. Such regulation is vital for hearing and for understanding speech. The discovery, detailed in the Feb. 11 issue of the journal Neuron, goes against a long-held assumption that the signaling of a sound's appearance and its subsequent disappearance are both handled by the same pathway...
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