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