Seddon Classification of Nerve Injury
| Grade |
Description |
| (1) Neurapraxia |
Temporary physiological block of nerve conduction without anatomical disruption. No Wallerian degeneration occurs. Recovery is spontaneous within days to weeks. |
| (2) Axonotmesis |
Axonal disruption within the myelin sheath. The nerve sheath remains intact. Wallerian degeneration occurs distal to the injury. Recovery is possible over time. |
| (3) Neurotmesis |
Complete severance of the nerve fiber or nerve trunk, often requiring surgical repair. Functional recovery may be partial or complete post-surgery. |
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