Sound, hearing, & the ear for slideshare
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The cochlea responds to different sound frequencies along the basilar membrane, with high frequencies near the oval window and low frequencies at the apex. Movement of cochlear fluid causes the tectorial and basilar membranes to bend, stimulating the outer hair cells and leading to action potentials in the inner hair cells. The inner hair cells synapse on bipolar cells to form the auditory nerve, with input from the left ear crossing to the right inferior colliculus and traveling to the medial geniculate nucleus of the thalamus and primary auditory cortex.
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Sound, hearing, & the ear for slideshare
- 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