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Nerve Injuries-Types

Types of Nerve Injuries

Neurapraxia Mildest form of injury
Neurapraxia Conduction block usually due to myelin dysfunction
Neurapraxia Axonal continuity conserved
Neurapraxia Nerve conduction is preserved proximal and distal to the lesion
Neurapraxia Nerve fibers are not damaged
Neurapraxia Recovery will occur within 4-6 weeks
Axonotmesis A more severe grade of injury to a peripheral nerve
Axonotmesis Reversible injury to damaged fibers
Axonotmesis Damage occurs to teh axons with preservation of the endoneurium (neural connective tissue sheath), epineurium, Schwann cells, and supporting structures
Axonotmesis Distal Wallerian degeneration can occur
Axonotmesis The nerve can regenerate distal to the site of lesion at a rate of one millimeter per day
Neurotmesis The most severe grade of injury to a peripheral nerve
Neurotmesis Axon, myelin, connective tissue components are all damaged or transected
Neurotmesis Irreversable injury, no possibility of regeneration
Neurotmesis All motor and sensory loss distal to lesion becomes permanently impaired
Created by: Hunter10