- Peripheral nerve injury: interruption of a nerve fibre's continuity (axon, with or without its myelin sheath) after trauma.
- Triggers Wallerian degeneration of the distal segment and, in peripheral nerves, subsequent regeneration.
Types of Nerve Injury
Types of peripheral nerve injury
Type
Neurotmesis
- Axon
- Interrupted
- Myelin sheath
- Interrupted
- Recovery
- Some functional loss inevitable
Axonotmesis
- Axon
- Interrupted
- Myelin sheath
- Preserved
- Recovery
- Occurs
Neuropraxia
- Axon
- Preserved
- Myelin sheath
- Preserved
- Recovery
- Occurs
- Common causes: compression, traction, trauma, cut, or intramuscular injection.