Auditory Pathways

Question 1

What does the auditory nerve carry to the cochlear nucleus?

Answer 1

Impulses

Question 2

What are the two streams?

Answer 2

Ventral cochlear nucleus with timing info (microseconds)
AND
Dorsal cochlear nucleus with quality info (frequency differences)

Question 3

Where does the ventral cochlear nucleus travel?

Answer 3

Projects to superior olive in medulla, compares bi-aural input, determines sound source
Then projects in/becomes lateral lemniscus to inferior colliculi

SLIM- Superior olive to Lateral lemniscus to Inferior colliculi to Medial geniculate thalamus

Question 4

Where does the dorsal cochlear nucleus travel?

Answer 4

Projects in lateral lemniscus to inferior colliculi

Question 5

What is the 8th cranial nerve?

Answer 5

Vestibulocochlear/auditory

Question 6

Where do info about timing & quality come together?

Answer 6

@ lateral lemniscus

Question 7

What is tonotopic organization?

Answer 7

Piano pic- organization of sound in brain. High pitch on outside, low pitch on inside.

Question 8

Where is the primary auditory cortex?

Answer 8

Heschl’s gyrus

Question 9

Why does tinnitus occur?

Answer 9

Brain “helps” you out by producing a sound it realizes you’re missing