Table 2. | Neurosensory impairment classification according to Sunderland [93] and Seddon [91] |
Sunderland | Seddon | Injury | Neurosensory impairment | Recovery Potential |
---|---|---|---|---|
I | Neuropraxia | Intrafascicular oedema, conduction block | Neuritis, paresthesia | Full (1day to 1 week) |
Possible segmental demyelination | Neuritis, paresthesia | Full (1 to 2 months) | ||
II | Axonotmesis | Axon severed, endoneurial tube intact |
Paresthesia, episodic dysesthesia |
Full (2 to 4 months) |
III | Endoneurial tube torn | Paresthesia, dysesthesia | Slow, incomplete (12 months) | |
IV | Only epineurium intact |
Hypoesthesia, dysesthesia, neuroma formation |
Neuroma-in-continuity | |
V | Neurotmesis | Loss of Continuity |
Anaesthetic, intractable
pain, neuroma formation |
None |
VI | Combination of above | Combination of above | Unpredictable |