Auditory Pathway to the Brain

Question 0

How does a signal involved with directional hearing get to the brain?

Answer 0

Axons synapse at the Superior Olivary Nucleus (at the pons-medulla junction)

Question 1

What happen to impulses from the cochlea?

Answer 1

Impulse passes via the spiral ganglion to cochlear nuclei in the medulla.

Question 2

How do signals involved with Auditory Reflex get to the brain?

Answer 2

Tracts ascend & synapse at the Inferior Colliculus.

Question 3

After impulses reach the cochlear nucleus in the medulla, where do they go next?

Answer 3

Impulses will next pass, via the thalamus, to the auditory cortex.

Question 4

What does the primary auditory cortex determine?

Answer 4

Loudness
Pitch
Direction

Question 5

Do most auditory pathways decussate?

Answer 5

Yes, so that both cortices receive input from both ears - assists in LOCALIZATION of the source of the sound.

Question 6

What does the auditory association cortex store?

Answer 6

Memories of sound