eighteen

Question 1

Outer Ear consists of

Answer 1

• Pinna
• Auditory Canal

Question 2

• Pinna:

Answer 2

Prominent cartilage-supported fold of skin that captures sound and directs it into the auditory canal.

Question 3

• Auditory Canal:

Answer 3

Terminates at the eardrum.

Question 4

Middle Ear consists of

Answer 4

Eardrum
Ossicles

Question 5

High-pressure regions push the eardrum

Answer 5

inward,

Question 6

low-pressure regions pull eardrum

Answer 6

outward.

Question 7

Inner Ear consists of

Answer 7

the cochlea

Question 8

Cochlea:

Answer 8

Spiral-shaped fluid-filled tube housing hair cells, the receptors for hearing.

Question 9

Tinnitus

Answer 9

tinnitus involves perceiving noises without an external stimulus.

Typically arises from cochlea or auditory nerve-related diseases but can also be spontaneous

Question 10

Vestibulocochlear Nerve

Answer 10

his nerve carries signals from the cochlea to the brain stem.
* Spiral ganglion cells synapse on cochlear nuclei neurons in the pons/medulla.
* NOT IN THE EAR, BRAIN STEM

Question 11

Primary Auditory Cortex is located

Answer 11

within the lateral sulcus, in the superior temporal lobe.
Heschl’s gyri or A1.

Question 12

The interaural time difference (ITD) is

Answer 12

the time difference between sound arrival at each ear

Question 13

• Covering the pinnae impairs

Answer 13

ability to determine sound source elevation.

Question 14

Not all auditory information crosses

Answer 14

the midline; each ear projects auditory data to both brain hemispheres.