02 Wallerian Degeneration
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![](https://photos.thisispiggy.com/file/wikiFiles/928CD34E-4482-47AB-9B1E-C94E36389955.jpg)
Peripheral
![](https://photos.thisispiggy.com/file/wikiFiles/FBD9F8AA-0A62-4685-8467-80A9C5CE8877.jpg)
- trauma
- arms/legs
- mild damage: neurapraxia
Neurapraxia
![](https://photos.thisispiggy.com/file/wikiFiles/F59B7030-42B5-4630-A396-40CF01A18A7D.jpg)
- Continuity: rest of nerve not severed
Neurotmesis
![](https://photos.thisispiggy.com/file/wikiFiles/E59B0107-CACA-4116-8FDA-B34B76A49520.jpg)
- entire nerve damaged, including epineurium
Axonotmesis
![](https://photos.thisispiggy.com/file/wikiFiles/4518B324-26E1-4F9D-9619-117593B31126.jpg)
- nerve distal and proximal to lesion react differently
![](https://photos.thisispiggy.com/file/wikiFiles/CE15FE60-593B-4F6C-B333-5CCB843DC104.jpg)
- axonal regrowth happens if schwann cell is intact
![](https://photos.thisispiggy.com/file/wikiFiles/DFA03858-FDF9-4F99-A0EE-6A1A1FF9393A.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/A86DF373-4631-4962-9603-96258C45A92B.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/289F3CBB-73B6-406F-AE7F-A36EEFE80FE7.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/7862F510-2DAA-4C6D-97DE-841C40D549EB.jpg)
CNS
Injury
![](https://photos.thisispiggy.com/file/wikiFiles/F78B8F30-8491-4981-A19D-A6D139A52FA7.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/B7408425-BED0-4AFB-A0C2-725B7F933AC3.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/71893140-9209-40CC-9BD0-8BD0CED0D750.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/61D21AC7-D5BF-443D-8440-3A2C2E17FCF7.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/38E9969C-9A63-4EDE-B9BF-80943BE51D0F.jpg)
- cyst walled off by astrocytes
UMN vs LMN
![](https://photos.thisispiggy.com/file/wikiFiles/12D2EF7C-E55A-4E76-B5DD-C18BEC62CE56.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/7D595A4F-2A47-46D9-99EA-5CC286F1D164.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/2EB8F760-4925-40CF-ADCB-5BB5B0988664.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/6745D9C8-3D73-4D46-BDE8-11AA47213C59.jpg)
![](https://photos.thisispiggy.com/file/wikiFiles/8B41CB1E-30AF-4D99-834C-7BEAB951CB04.jpg)
Bulbar
![](https://photos.thisispiggy.com/file/wikiFiles/C48B3369-5FA4-4FA6-B746-F9CCF484AE6B.jpg)
- face and neck
- bulbar palsy or symptoms
![](https://photos.thisispiggy.com/file/wikiFiles/10E6FD62-1514-410F-9118-FD88D5721979.jpg)
- bulbar palsy: LMN palsy of bulbar
![](https://photos.thisispiggy.com/file/wikiFiles/C9C1C741-FDEA-44BD-A782-7E0CA09250B3.jpg)
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