click below
click below
Normal Size Small Size show me how
Nerve Injuries-Types
Types of Nerve Injuries
Type: | Answer: |
---|---|
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 |