NEUR 2200 Lecture Notes - Lecture 14: Aphasia, Hair Cell, Inferior Colliculus
28 Feb 2017
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Properties of sound: frequency (pitch): rate at which the waves vibrate, amplitude (loudness): intensity of the sounds. More amplitude = more firing of outer hair cells in cochlea. More intense sound = greater shearing of the hair cells: complexity (timber): identifies the nature of the sound (violin or trombone) Auditory system converts physical properties (air pressure) into electrochemical neural activity. No (sound is a product of the brain) Right temporal lobe analyzes musical sounds for meaning. Outer ear: pinna (external funnel structure): catches sound waves from the external environment and deflect them into the ear canal, external ear canal: amplifies sound waves and direct them the eardrums which vibrate in accordance with the frequency. Middle ear: air filled chambers that comprises the ossicles: ossicles: connects the eardrum to the oval window (this vibrates to send waves through the cochlear fluid) of the cochlea, bones: hammer, anvil, stirrup.
