Lecture 10: Auditory system

Question 1

From which frequency can sounds not be distinguished anymore?

Answer 1

3000Hz

Question 2

What is the Hz range of the audible spectrum?

Answer 2

20 Hz - 20000 Hz

Question 3

Where in the brain is the superior olive located?

Answer 3

(mid) pons
NOTE: binaural pathway

Question 4

Through where does the contralateral LSO get inhibited?

Answer 4

MNTB

Question 5

The nucleus lateral lemniscus (NLL) is a mono-reural pathway. What do the cells code?

Answer 5

Onset of sound and the duration of the sounds
NOTE: not dependent on binaural coding

Question 6

Through which structure does the NLL project to the medial geniculate nucleus in the thalamus

Answer 6

Inferior colliculus

Question 7

What are the A1 and A2 do?

Answer 7

A1: specializes in basic detection and mapping of sound properties like frequency, intensity and timing.
A2: processes and integrates sounds to interpret patterns, context and meaning. Supporting things like speech comprehension and music perception.