Szabo R M, Bay B K, Sharkey N A, Gaut C
Department of Orthopaedics, University of California, Davis, School of Medicine.
J Hand Surg Am. 1994 Nov;19(6):901-6. doi: 10.1016/0363-5023(94)90087-6.
We determined the direct relationships between wrist position and displacement of the median nerve during active contraction of the flexor tendons at the wrist with an intact, transected transverse carpal ligament (TCL). Nine fresh cadavers were mounted in an apparatus to allow variable wrist position. Excursions of the tendons and displacement of the median nerve were measured by tracking markers with a video camera. Each limb was tested at 0 degree, 30 degrees, and 60 degrees of wrist extension before and after release of the TCL. Excursion of the flexor tendons required for full finger flexion ranged from 2.3 to 3.1 cm (mean, 3 cm). Median nerve displacement ranged from 0.9 to 1.4 cm (mean, 1 cm). The relationship between median nerve and flexor tendon excursion was consistently linear. Finger motion alone allows for median nerve displacement after surgery in the carpal tunnel.
我们确定了在腕部屈肌腱主动收缩时，腕部位置与正中神经移位之间的直接关系，实验对象为腕横韧带完整或横断的新鲜尸体。九具新鲜尸体被安装在一个装置中，以实现腕部位置的可变。通过用摄像机跟踪标记物来测量肌腱的移动和正中神经的移位。在切断腕横韧带前后，对每个肢体在腕关节伸展0度、30度和60度时进行测试。全手指屈曲所需的屈肌腱移动范围为2.3至3.1厘米（平均3厘米）。正中神经移位范围为0.9至1.4厘米（平均1厘米）。正中神经与屈肌腱移动之间的关系始终呈线性。仅手指运动就可导致腕管手术后正中神经移位。
