PSYCO104 Lecture Notes - Lecture 15: Chemical Substance, Olfactory Bulb, Menstrual Synchrony

• School: University of Alberta
• Department: Psychology
• Course: PSYCO104
• Professor: Eric Legge

Document Summary

Sound waves travel into auditory canal leading to eardrum (movable membrane that vibrates in response to sound waves) aka tympanic membrane: middle ear. Ossicles: hammer (malleus), anvil (incus), stirrup (stapes) Amplifies sound waves: hammer is attached to ear drum, stirrup attached to oval window (boundary between middle and inner ear) Cochlea: coil-shaped structure containing sound receptors and filled with. Contains basilar membrane: runs length of cochlea and: organ of corti: embedded in basilar membrane contains organ of corti containing hair cell receptors for sound. Hair cells synapse with neuron to auditory nerve. Nerve sends impulses via auditory relay station in thalamus to auditory cortex. Theories of hearing (pitch perception: place theory: sound frequencies are coded in portion of basilar membrane where fluid varies in cochlea peaks. Depends on place and frequency coding of vibrations. Low frequency tones appear to be translated into pitch through frequency coding. High frequency pure tones appear to rely on place coding.