32. Organs of Hearing
Organ of Corti
Located within the cochlea
Receptors = hair cells on the basilar
membrane
Gel-like tectorial membrane is capable of
bending hair cells
Cochlear nerve attached to hair cells
transmits nerve impulses to auditory cortex
on temporal lobe
47. Ascending auditory
pathway
C o m m issure o f
Infe rio r c o llic uli
Inferior Col liculus
Pons
*Lower pontine
tegmentum)
Inte rm e d ia te
a c o ustic stria
(De c c usa t e )
Ve ntra l a c o ustic
stria
Do rsa l
a c o ustic
stria
Medulla
*Medullary-
pontine junction
Le ft a ud ito ry ne rve
Ventral Cochlear
Nucleus
Dorsal Cochlear
Nucleus
Superior Olivary
N ucleus
Inferior Colliculus
M edial Geniculate Body
Left A uditory Cortex (A 1)
la te ra l le m nisc us
Superior Olivary
N ucleus
Midbrain
Thalamus
Superior
temporal lobe
Tra p e zo id b o d y
Le ft Right
la t e ra l le m nisc us
Le ft Right
