Auditory Sustem

Question 1

Frequency

Answer 1

Tells about pitch

Question 2

Amplitude of sound wave

Answer 2

Tells about loudness

Question 3

Tore quality

Answer 3

Ability to recognize someone’s voice

Question 4

Basilar membrane

Answer 4

Has hair cells that bend to open up Na+ channels.

Question 5

Oval window

Answer 5

Like second tympanic membrane

Question 6

Round window

Answer 6

Releases pressure in cochlea

Question 7

Auditory pathway to brain

Answer 7

Auditory nerve, to superior olive (brainstem), to inferior colliculus (midbrain), to medial geniculate nucleus (thalamus), to primary auditory cortex (temporal lobe)

Question 8

Primary auditory cortex

Answer 8

Anterior -“what is that” pathway
Posterior - “where is it coming from” pathway

Won’t cause loss of hearing if damaged.

Question 9

Frequency theory

Answer 9

Only works for Hz under 1000.
Freq is proportional to action potentials fired
Cells fire in volleys and perceive it as other pitch after 1000Hz
We don’t have cells that can fire that fast

Question 10

Place theory

Answer 10

Location in cochlea stimulated determines pitch.

Base is stiff-high sounds and apex is floppy- low sounds

Question 11

Deafness caused by nerve damage

Answer 11

Vestibucochlear nerve (auditory nerve) hair cells damaged

Question 12

Deafness due to conduction damage

Answer 12

Bones start to lose mass, cannot conduct sound well.

Question 13

Localization of sound

Answer 13

Easy to do w mid pitched sounds. Hard w high pitched sounds.
Sound shadow