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Answer :
Final answer:
A low median nerve injury can result in a claw hand deformity, a condition characterized by abnormal finger positions due to the loss of median nerve function affecting the intrinsic hand muscles.The correct answer is option a.
Explanation:
A low median nerve injury can result in a claw hand deformity. Claw hand is a condition where there is hyperextension at the metacarpophalangeal (MCP) joints and flexion at the proximal and distal interphalangeal joints. This deformity is linked with the median nerve because it provides motor and sensory innervation to some of the intrinsic muscles of the hand. When these muscles are not properly stimulated due to the nerve injury, it can lead to the characteristic clawing of the hand.
Conditions such as carpal tunnel syndrome can compress the median nerve but primarily affect the sensation and might lead to muscle weakness without necessarily causing a claw hand. The treatment of nerve compression typically involves splinting, corticosteroid injections, or surgery to reduce pressure on the nerve. However, if the injury is severe and lowers down near the hand, it can result in denervation of muscles causing a deformity resembling a claw.
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