A. STATOCYST - MACULA
O    M
ovement
Clllun-i —
_l____LL
-I------1— recording from axon
-----------applied  stimulus
'   i ' i i i........n
B. CANAL - CRISTA
-head
cupula
head
Tropomyosin
Cullculaff/^         T->
Plate    [
J___lllllllll
Semicircular „canals
taclil-ea
Stereocilia     Tectorial ntembrane
Fig.H.S Mechanism of transduction in the vestibular hair cell. Movement © in the direction of increasing cilia height stretches thin in-terciliary strands @. This causes an increase in membrane conductance to K *" ®, which moves into the cilium down its concentration gradient (extracellular K ( concentration is very high in the endolymph). The resulting depolarization spreads into the cell ®, triggering transmitter release at the hair cell synapse onto vestibular nerve sensory terminals ©. See text.

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