IC & MGB Flashcards
1
Q
What is the major nucleus between the SOC and IC? Is it obligatory? What nucleus is it physiologically similar to?
A
- Lateral Lemniscus
- Not obligatory
- IC
2
Q
What is the purpose of ICC? ICX? ICD?
A
- ICC: relay station for afferent signals
- ICX: multisensory integration
- ICD: relay station for efferent signals
3
Q
Explain the tonotopicity of the IC.
A
- Low frequencies: lateral
- High frequencies: medial
4
Q
How do TCs in ICC compare to AN? ICD vs AN?
A
- ICC: sharper
- ICD: poor tuning (broader, multiple peaks, inhibitory sidebands)
5
Q
List three stimulus properties that we start to get tuning to at the level of the IC.
A
- Stimulus duration
- Rise/fall times
- Modulation
- AN/FM sweep direciton
6
Q
What is the limit of phase locking in the IC?
A
-600 Hz
7
Q
What are the three main sections of the MGB? Which is the main auditory relay?
A
- Ventral MGB –> main auditory relay
- Medial MGB
- Dorsal MGB
8
Q
What is the limit of phase locking in the MGB?
A
- Most: 250 Hz
- Only 10% can go up to 1000 Hz
9
Q
Outputs from MGB go where?
A
-Cortex (Layers III and IV of AI)
