Neurapraxia
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Neurapraxia is part of Seddon's classification scheme used to classify nerve damage. It is a transient episode of motor paralysis with little or no sensory or autonomic dysfunction. Neurapraxia describes nerve damage in which there is no disruption of the nerve or its sheath. In this case there is an interruption in conduction of the impulse down the nerve fiber, and recovery takes place without wallerian degeneration. This is the mildest form of nerve injury. This is probably a biochemical lesion caused by concussion or shock-like injuries to the fiber. In the case of the role nerve, neurapraxia is brought about by compression or relatively mild, blunt blows, including some low-velocity missile injuries close to the nerve. There is a temporary loss of function which is reversible within hours to months of the injury ( the average is 6-8 weeks ). There is frequently greater involvement of motor than sensory function with autonomic function being retained.
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