PSYC 110 Lecture Notes - Lecture 13: Semicircular Canals, Oval Window, Basilar Membrane
14 Jun 2018
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Hearing
• Review
o Thalamus – switch board
▪ If does’t hit thalaus the ot i your osiousess
o Our olfactory bulbs are smaller than other animals ie bears and dogs
• Review: Gate Control theory
o Mechanism of experiencing pain
o Stub toe
▪ Fast pain receptors
▪ Put pressure on wound
▪ Gate otrol wo’t let sharp pai sigals up to rai a delta fiers
▪ But still have dull throbbing pain ( c fiber)
• Evolutionary: body is telling you know you need to isolate injured
area
• General Sensory Process
• Properties of Sound Waves
o Frequency
▪ Hertz
▪ How fast
o Amplitude
▪ Distance from high to low
▪ Low is less air
o Complexity
• Intestisty of some common soubds
o Decibels
o Louder will destroy hair cells
• The ear
o Columns of sound get collected in pinna
o Channel it down auditory canal
o To eardrum
o Which will vibrate back and forth at same frequency
o Which vibrate the ossicles: hammer anvil stirrup
o Which pushes cochlea (labrynth) to push on oval window
o Pushing cochlea back and forth that has liquid in it
o Semicircular canals
▪ Crystals moving around with gravity to determine where your head is in
space
• Cochlear animation
o Cochlea gets fatter the more you roll it out
o High pitches are closest
o Low pitches are further away/ inside wrap
• Hearing loss
o Hair cells on basilar membrane
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