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Comparison of Seddon and Sunderland classifications of nerve injury.
| Sunderland | Seddon | Histopathology |
|---|---|---|
| 1 | Neurapraxia | Functional but not anatomical disorganization |
| 2 | Axonotmesis | Intact endoneurium and perineurium |
| 3 | Axonotmesis | Intact perineurium |
| 4 | Axonotmesis | Intact epineurium |
| 5 | Neurotmesis | Disruption of all layers |
