Ruder J R, Wood V E
Department of Orthopaedic Surgery, Loma Linda University, School of Medicine, CA.
J Hand Surg Am. 1993 Sep;18(5):893-5. doi: 10.1016/0363-5023(93)90062-8.
The motor branch of the ulnar nerve can be compressed by the arch of origin of the adductor pollicis muscle. There can be a well-defined band of tissue either at the point where the nerve crosses the third metacarpal or where it penetrates the adductor muscle. In over half of the cadaver hands studied no arch was demonstrated. Clinically these patients present with obvious atrophy of the first dorsal interosseous and adductor muscle. Usually pain is not a prominent symptom. This type of ulnar nerve compression neuropathy is present in less than 1% of those ulnar neuropathies that occur at the wrist and hand.
尺神经运动支可被拇收肌起点弓压迫。在神经跨过第三掌骨处或其穿入内收肌处，可能存在一条界限清晰的组织带。在超过半数的研究尸体手中未发现弓状结构。临床上，这些患者表现为第一背侧骨间肌和内收肌明显萎缩。通常疼痛不是突出症状。这种类型的尺神经卡压性神经病在腕部和手部发生的尺神经病中不到1%。
