TSM 1.14 Flashcards
1
Q
what is neurapraxia?
A
- damage is minimal
- axons remain intact but conduction ceases due to local ischemia and demyelination
2
Q
what is axonotmesis
A
- axon damaged by compression or traction
- the investing sheaths remain intact
3
Q
what is neurotmesis?
A
entire nerve is completely divided
4
Q
what inhibts axon growth in CNS?
A
- CNS myelin
5
Q
why CNS cannot have nerve regeneration?
A
- different myelin
- no axon promoting molecules
- inhibitory molecules present
- GAP 43 has no effect
6
Q
describe axon regneration in PNS?
A
- motoneurone synthesizes proteins needed for axon growth
- when motor axon sprouts will find array of schwann cells to guide
