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. 2018 Mar 31;27(1):56–60. doi: 10.5978/islsm.18-OR-06

Table 2: Seddon Classification (Seddon H: Three types of nerve injury. Brain 66:237‧288, 1943:).

Type 1 Neurapraxia:

  • - No anatomical disruption

  • - A nerve interrupted conduction causing temporary paralysis

  • - No axonal degeneration occurs

  • - Typically, there is recovery in days to weeks

Type 2 Axonotmesis

  • - Axonal degeneration but endoneurial tubes and surrounding connective tissue elements remain intact

  • - Distal Wallerian degeneration

  • - Full recovery is usual but may take weeks to months

Type 3 Neurotmesis

  • - Nerve divided

  • - Usually violent, open injuries

  • - All axons and connective tissue elements disrupted

  • - Wallerian degeneration distally

  • - Full recovery unlikely