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Abnormal involvement of the median nerve due to anything that increases the volume of the structures within this tunnel, or any condition that narrows the tunnel itself.
MECHANISM OF INJURY
The carpal tunnel may be narrowed by local trauma, bone deformity following fracture, osteoarthritis, synovial swelling of tendon or wrist joint, and thickening of the transverse ligament. Often, no local cause for median nerve compression can be detected. The syndrome may be produced by radial and ulna arterial impairment since they also pass beneath the transverse carpal ligament.
Numbness, and pain which follows the course of the median nerve distribution.
Early swelling at the wrist and later sensation impairment of the thumb, forefinger, middle finger, and the medial one-half of the ring finger. Muscle atrophy may be present. Extreme extension/flexion may reproduce or intensify symptoms.
Procedure: The patient puts the backs of both hands together and holds the wrists in forced flexion 1 minute.
Positives: Numbness and tingling along the median nerve distribution in the hand.
Indicates: Median nerve entrapment.
(Carpel Tunnel Syndrome – Fingers 1, 2, 3)
Paralunar dislocation and fracture of the scaphoid are frequently found in cases of trauma.
Muscles of the wrist.
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