Table 2.

Classification of Nerve Injury

Classification	Physiology	Histology	Prognosis
Neuropraxia	Focal conduction block	Local myelin injury; no axonal injury	Recovery in weeks to months
Axonotmesis	Loss of nerve conduction at injury site and distally	Loss of continuity of axon, but endoneurial tube, perineurium and epineurium are intact	Good
		Loss of continuity of axon and endoneurial tube, but perineurium and epineurium are intact	Poor
Neurotmesis	Loss of nerve conduction at injury site and distally	Severance of entire nerve	Regeneration only possible if distal stump reconnected