Classification of Nerve Injuries
January 9, 2021 || By : Dr. MhmadFarooq || Basic Science
- Nerve injury can result from compression, gun shoot, stapping injuries or iatrogenic injuries.
- The most widely used classification of Nerve Injuries are Seddon & Sunderland.
What is the classification of Nerve Injuries?
Seddon classification of nerve injuries (in 1941):
| Type | Description | Recovery |
|---|---|---|
| Neurapraxia | Paralysis in the absence of peripheral degeneration. | The delay in recovery may be long, but recovery will be complete. |
| Axonotmesis | Damage 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. |
| Neurotmesis | All 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. |
Sunderland classification of nerve injuries (in 1978):
| Degree | Description |
|---|---|
| I | In this injury all structures are preserves, but conduction is temporarily blocked. |
| II | In this injury, wallerian degeneration occurs, but endoneurial integrity is maintained and recovery is complete. |
| III | This Injury adds endoneurial destruction and internal fascicular disorganization . recovery is poorer, with possible cross-regeneration. |
| IV | This injury characterized by complete internal disorganization, but some continuity of external structure remains. |
| V | This injury involves complete disruption of all nerve structures. |
Seddon classification 
Sunderland classification
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