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Nerve injury classification..

Classification of Nerve Injuries
SeddonSunderlandStructural and Functional Processes
Neuropraxia1Myelin damage, conduction slowing, and blocking
Axonotmesis2Loss of axonal continuity, endoneurium intact, no conduction
Neurotmesis3Loss of axonal and endoneurial continuity, perineurium intact, no conduction
4Loss of axonal, endoneurial, and perineurial continuity; epineurium intact; no conduction
5Entire nerve trunk separated; no conduction

Based on data from Seddon H: Three types of nerve injury. Brain 1943;66:236–288; Sunderland S: A classification of peripheral nerve injuries producing loss of function. Brain 1951;74:491–516; and Lundborg G: Nerve Injury and Repair. Churchill Livingstone, 1988.

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