02 Wallerian Degeneration
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Peripheral
- trauma
- arms/legs
- mild damage: neurapraxia
Neurapraxia
- Continuity: rest of nerve not severed
Neurotmesis
- entire nerve damaged, including epineurium
Axonotmesis
- nerve distal and proximal to lesion react differently
- axonal regrowth happens if schwann cell is intact
CNS
Injury
- cyst walled off by astrocytes
UMN vs LMN
Bulbar
- face and neck
- bulbar palsy or symptoms
- bulbar palsy: LMN palsy of bulbar
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