PSY 1101 Study Guide - Midterm Guide: Sound Pressure, Optic Chiasm, Visual Cortex

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Kenneth Campbell

Document Summary

Result of collision of air, molecules resulting in compression and expansion of air waves . Frequency (time between waves determine wavelength, cause the ear drum to vibrate), Intensity (# molecules put into motion reflect strength- decibel=db measure of sound pressure level) The auditory nerve initially synapses in the medulla of the hindbrain, where info is extracted. Risks of hearing: conduction hearing loss: damage to the sensitive middle ear mechanical device, sensorieneural hearing loss: damage to the cochlea (or hair cells) The # of times the auditory nerve fires codes frequency. A single neuron cannot fire at a rate higher than 1000 hz. But if neuron fire in a volley (like cannons), higher freq. is coded. The light sensitive rods and cones are located in the back of the retina. The axons of the ganglion cells converge as the blind spot to form the optic nerve. Light creates neural impulse: cone/rod bipolar cell ganglion cell optic nerve.