Cochlear Nucleus

Question 1

How many sections does the CN have? What are they?

Answer 1

3-
Dorsal cochlear nucleus (DCN), posteroventral cochlear nucleus (PVCN)
anteroventral cochlear nucleus (AVCN)

Question 2

How is the CN tonotopically organized?

Answer 2

For each section DCN, PVCN, AVCN-moves from high freq to low freq
CF (kHz) decreases as depth of insertion increases

Question 3

What are the 5 main cell types in the CN?

Answer 3

Spherical bushy cells
globular bushy cells
multipolar (stellate)
octopus
pyramidal

Question 4

What are the 5 main PSTH types in the CN?

Answer 4

Primary like 
on
chopper 
primary with notch
pauser

Question 5

Compared to the AN, the CN has this type of phase locking.

Answer 5

The CN has better phase locking.

Question 6

Where are the spherical and globular bushy cells? Where do they project? They effectively act as what?

Answer 6

AVCN
Project to MSO LSO
Act as relay cells

Question 7

Inhibition changes PSTHs. It also changes rate-level functions. What is one change that can occur for a rate-level function when there is inhibition as compared to when there is none?

Answer 7

Non-monotonic rate-level functions

Question 8

Which area has the best temporal processing in the CN? Spectral processing?

Answer 8

Temporal processing-AVCN, Spectral processing- DCN

Question 9

What is the largest outflow from the CN?

Answer 9

Ventral acoustic stria