Inner Hair Cells(IHCs) | |
Overview / Synapses / Physiology | |
Drawings: S. Blatrix |
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IHC resting potential is low (around -40 mV). This is a value very close to that needed for the opening of voltage-gated Ca2+ channels; thus the synapse can be activated quickly. |
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Micro-electrode recordings (see ref.a) show that IHC tuning is as sharp as that of auditory nerve fibres, thus indicating that tuning is a presynaptic issue (see later: OHC active mechanism). In addition, the IHC tuning properties disappear when OHCs are damaged. |
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