A sensory cell whose mechanically sensitive bundle supports mechanotransduction. The cochlear inner and outer classes have different dominant roles in afferent signaling and mechanical feedback.
A cochlear hair-cell class contributing mechanical feedback that increases weak-sound sensitivity and sharpens frequency selectivity. Its feedback-dependent effects are part of the cochlear amplifier.
A cochlear hair-cell class providing most afferent input to the auditory nerve. Mechanical stimulation changes receptor activity and transmitter release; downstream auditory nerve fibers carry action potentials.
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