LaBan M M, Friedman N A, Zemenick G A
Arch Phys Med Rehabil. 1986 Nov;67(11):803-4.
Tension of the median nerve produced by simultaneous extension of the supinated wrist and distal interphalangeal joint of the index finger was noted to result in proximal volar forearm pain radiation in patients with chronic carpal tunnel syndrome. This sign was less frequent in patients with a more acute syndrome. Adhesions between the median nerve and the overlying transverse carpal ligament and the development of a pseudoneuroma can individually or together occur in the chronic carpal tunnel syndrome limiting distal nerve excursion of the tethered nerve during simultaneous wrist and index finger extension.
在慢性腕管综合征患者中，当旋后位腕关节和示指远侧指间关节同时伸展时，正中神经张力增加会导致前臂掌侧近端疼痛放射。在急性综合征患者中，这种体征出现的频率较低。在慢性腕管综合征中，正中神经与腕横韧带之间的粘连以及假性神经瘤的形成，可单独或共同发生，在腕关节和示指同时伸展时限制了受束缚神经的远端神经移动。
