1. INSIDE THE COCHLEA
 Regions of the basilar membrane
respond to different frequencies
 High frequencies near the oval
window, low frequencies at the apex

2. ORGAN OF CORTI
 Movement of cochlear fluid causes tectorial and
basilar membranes to bend
 Outer hair cells are stimulated leading to action
potentials in the inner hair cells

3. AUDITORY PATHWAYS
 Inner hair cells synapse on
bipolar cells forming the
auditory nerve
 Input from the left ear
crosses to the right
inferior colliculus
Medial geniculate
nucleus of the thalamus
Primary auditory cortex of
the temporal lobe