PSYC 401 Lecture Notes - Lecture 7: Cochlear Nucleus, Basilar Membrane, Sensory System
Document Summary
Sensory systems for test, vision and audition. Frequency and amplitude: height of wave reflects amplitude of wave. = how close together peaks and valleys of waves are. The ear: focus on major structures filled with fluid vibrations hit and move membranes move mechanical bending of hair cells (in cochlea) on receptors generates action potentials. Soundwaves are translated into external auditory canal > tympanic membrane (eardrum) 3 bones hammer, anvil, stirrup cochlea. 7. 7: another cue is the phase difference between the ears wave form (see fig. 7. 8): i. e. siren when driving you lose sound localization cues b/c car receives siren. This works best for low frequencies (see fig. 4,000 hz the number of impulses up to about 4,000 hz. Hearing loss: conductive deafness (middle-ear, this occurs if the bones of the middle ear do not transmit sound waves, causes include diseases, infections, tumors, etc.
