quiz 5

Question 1

the functional role of outer hair cells during the perception of a physical sound wave?

Answer 1

They amplify signals at a characteristic frequency by increasing the activity of inner hair cells

Question 2

Using phase locking, how would we expect inner hair cells to respond to a 2,000 Hz signal?

Answer 2

Multiple inner hair cells will respond, but each to different peaks in the sound wave (e.g. each hair cell fires to every fifth peak, 400 times per second).

Question 3

You load a 17.4 kHz ringtone onto your phone. Your parents are not able to hear it, though otherwise they appear to have normal hearing. They most likely have ___________ hearing loss.

Answer 3

sensorineural

Question 4

You friend, Tim Panik, sustained damage to the ossicles in one ear as the result of a childhood ear infection. As a result, his hearing appears to be worse in that ear for all frequencies. How would we best characterize this type of damage?

Answer 4

conductive hearing loss

Question 5

The first anatomical region in the auditory processing pathway to receive signals from both ears is the:

Answer 5

Superior olivary nucleus

Question 6

During auditory signal propagation from ear to cortex, the signal passes through the ________________ of the thalamus.

Answer 6

Medial geniculate nucleus

Question 7

The hierarchical organization of the primary auditory cortex designates the core area to process _______ while the belt and parabelt respond preferentially to _____________.

Answer 7

pure tones; complex tones

Question 8

You are recording from a single ‘pitch neuron’ just outside of area A1. It will likely respond best to:

Answer 8

A specific fundamental frequency.

Question 9

Owl monkeys were trained to discriminate between two frequencies near 2,500 Hz. When recording from individual cells in the auditory cortex, it was found that more cells responded to 2,500 Hz tones after training. This increase is best viewed as an example of:

Answer 9

Experience-dependent plasticity

Question 10

A patient arrives at the hospital after experiencing a small, anterior temporal lobe stroke. Which of the following problems is he most likely to have?

Answer 10

Difficulty recognizing tones

Question 11

While participating in an auditory experiment, you are presented with a a single pure tone played in long bursts, with brief pauses between the bursts. Unbeknownst to both you and the experimenter, you forgot to turn off you cell phone, and it went off repeatedly during the experiment. You task had been to determine each time the pure tone paused. However, you never detected the pauses because your cell phone miraculously went off each time the tone paused. This perceptual effect is likely due to the ______________ grouping heuristic.

Answer 11

auditory continuity

Question 12

You go to hear a jazz band in a live concert. You listen carefully (with your eyes closed) and try to identify the different instruments being played. Although a number of perceptual heuristics are useful, what grouping principle should always be important when segregating the auditory stream by instrument?

Answer 12

similarity of timbre and pitch