Nerve injury can result from compression, gun shoot, stapping injuries or iatrogenic injuries.

The most widely used classification of Nerve Injuries are Seddon and Sunderland Classification.

What is the classification of Nerve Injuries?

Seddon classification of nerve injuries (in 1941):

NeurapraxiaParalysis in the absence of peripheral degeneration.The delay in recovery may be long, but recovery will be complete.
AxonotmesisDamage to nerve fibers with complete peripheral degeneration but with intact of the Schwann sheath which provide support for accurate spontaneous regeneration. Good recovery is anticipated, and no intervention can improve the outcome.
Complete recovery depends on a number of factors, including timely removal of the compression and axon regeneration.
NeurotmesisAll essential structures, both neural and supporting tissues, have been disrupted. This category includes neuroma in continuity, division of nerves, and anatomic disruption.Recovery rarely is complete, and the amount of loss can only be determined over time.
Seddon classification of nerve injuries

See Also: Brachial Plexus Palsy

Sunderland classification of nerve injuries (in 1978):

IIn this injury all structures are preserves, but conduction is temporarily blocked.
IIIn this injury, wallerian degeneration occurs, but endoneurial integrity is maintained and recovery is complete.
IIIThis Injury adds endoneurial destruction and internal fascicular disorganization . recovery is poorer, with possible cross-regeneration.
IVThis injury characterized by complete internal disorganization, but some continuity of external structure remains.
VThis injury involves complete disruption of all nerve structures.
Sunderland classification of nerve injuries