PSYC 100 Lecture Notes - Lecture 10: Rhinal Cortex, Orbitofrontal Cortex, Brainstem

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jill L Atkinson

Document Summary

Tuesday november 15th, 2016 he outer ear: composed of the pinna/auricle, the ear canal and the ear drum, pinnae: look like funnels and lead to the ear canal. They push all the energy of the in-out vibration of the large eardrum into an in-out vibration of the small oval window of the inner ear. Cochlea: hair cells inside the cochlea have little hairs called cilia on their tops, when uid moves in the cochlea, these cilia move bath and forth. Movement in one direction causes a depolarization of the hair cell resulting in an action potential in the auditory nerve going to the brain. Loud noises: most hearing damage comes from damage to the cilia which are irreplaceable, sounds over 85dbs can cause measurable hearing loss. Loudness: what we hear as loudness, is coded by the degree to which each auditory nerve bre res on every cycle of a stimulating waveform.