Seddon's classification

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Seddon's classification is a scheme for describing nerve injury.

1. Neurapraxia -- temporary paralysis of a nerve caused by lack of blood flow or by pressure on the affected nerve with no loss of structural continuity.
2. Axonotmesis -- neural tube intact, but axons are disrupted. These nerves are likely to recover.
3. Neurotmesis -- the neural tube is severed. These injuries are likely permanent without repair, and will likely only achieve partial recovery at best.

[edit] References

1. PMID 9421863