Felsenthal G, Mondell D L, Reischer M A, Mack R H
Arch Phys Med Rehabil. 1984 Mar;65(3):139-41.
This report describes a syndrome of compression of the lateral cutaneous nerve of the forearm (LCNF), the distal termination of the musculocutaneous nerve. Three patients presented with pain or numbness along the radial aspect of the distal forearm. There was a history of vigorous upper extremity exercise with elbow extension and arm pronation or resisted elbow flexion. Signs included: decreased sensation to pin and light touch in the distal forearm over the cutaneous distribution of the nerve; tenderness to palpation over the nerve where it pierces the deep fascia of the arm lateral to the bicipital tendon and proximal to the elbow crease; and decreased elbow extension with arm fully pronated. Electrodiagnostic studies revealed either a prolonged distal latency or decrease in amplitude of the evoked response of the lateral cutaneous nerve of the forearm in the symptomatic arm. Patients responded to treatment directed to the site of the lesion where the nerve pierces the deep fascia of the arm. Treatment methods included: restriction of upper extremity activity, use of a posterior splint to restrict elbow extension, transcutaneous electrical nerve stimulation (TENS), ultrasound, and surgical decompression. This syndrome may be readily differentiated from other causes of pain along the distal radial aspect of the forearm, making accurate diagnosis and treatment possible.
本报告描述了一种前臂外侧皮神经（LCNF，即肌皮神经的远端终末支）受压综合征。三名患者表现为前臂远端桡侧疼痛或麻木。有上肢剧烈运动史，包括伸肘、旋前或抗阻屈肘。体征包括：在前臂远端神经皮支分布区域，针刺觉和轻触觉减退；在神经穿过肱二头肌肌腱外侧、肘横纹近端的臂部深筋膜处触诊有压痛；手臂完全旋前时伸肘功能减弱。电诊断研究显示，患侧前臂外侧皮神经诱发反应的远端潜伏期延长或波幅降低。患者对针对神经穿过臂部深筋膜处病变部位的治疗有反应。治疗方法包括：限制上肢活动、使用后侧夹板限制伸肘、经皮电刺激神经疗法（TENS）、超声治疗以及手术减压。该综合征可很容易地与前臂远端桡侧疼痛的其他病因相鉴别，从而实现准确诊断和治疗。
