Match each hearing impairment listed below with a single lesion or mutation in t
ID: 58718 • Letter: M
Question
Match each hearing impairment listed below with a single lesion or mutation in the auditory system that could be responsible for it. For the purposes of this question, assume that each impairment is acquired in adulthood as opposed to present at birth. You should not use the same lesion/mutation twice. Please select a letter to match each number, not the other way around.
For each pair you have determined in part a, explain briefly what is known about how the given lesion produces the specified auditory impairment.
Hearing Impairment
i. Inability to hear low-pitched tones
ii. Difficulty distinguishing speech vs. non-speech sounds
iii. Deafness in left ear
iv. Inability to turn toward the location of a sound
v. Difficulty recognizing whether or not a voice is familiar
Lesion/damage
Lesion to auditory nerve of right ear
Degeneration of inner hair cells at the base of the cochlea
Bilateral lesion to the primary auditory cortex
Lesion to the left primary auditory cortex
Bilateral lesion to the prefrontal cortex
Lesion to the left auditory belt areas
Degeneration of inner hair cells at the apex (tip) of the cochlea
Severe swelling of left outer ear
Bilateral lesion to the inferior colliculus
Lesion to the right auditory belt areas
Explanation / Answer
1. Inability to hear low pitched tones -degenration of the inner hairlines at the base of chochlea
2. Distingush between the speech vs non speech -degeneration of the inner hairlines at the apex of the cochlea
3. Deafness in the left ear ; lesions to the left primary auditory cortex.
4. Inability turn towards the location of the sound ; bilateral lesion to the primary auditory cortex.
5.Difficulty in recognizing the voice is familiar or not ; bilateral lesion to the prefrontal cortex.