第四蚓状肌全部由尺神经深支支配。
The fourth lumbrical muscles arc all controlled by the deep branch of the ulnar nerve.
目的：探讨尺神经深支卡压的病因及诊治方法。
Objective: To investigate the etiology, diagnosis and treatment of deep branch of ulnar nerve entrapment.
骨间前神经、正中神经掌皮支、尺神经深支发支参与支配腕关节的掌侧。
Wrist joint at palmar side was innervated by anterior interosseal nerve, palmar cutaneous branch of median nerve and profound branch of ulnar nerve.
根据解剖特点，临床上应用正中神经旋前方肌支修复鱼际支17例，修复尺神经深支3例。
In patients, the technique was applied to repair 17 cases of injury of thenar branch and 3 cases of injury of deep branch of ulnar nerve.
结论小指对掌肌腱弓可以卡压尺神经深支，引起除小鱼际肌以外的尺神经支配的所有手内在肌的功能障碍。
Conclusion We found that the fascial arch of the opponens digiti minimi can compress the deep branch of the ulnar nerve causing motor deficit of the intrinsic muscles of hands.
结论小指对掌肌腱弓可以卡压尺神经深支，引起除小鱼际肌以外的尺神经支配的所有手内在肌的功能障碍。
Conclusion We found that the fascial arch of the opponens digiti minimi can compress the deep branch of the ulnar nerve causing motor deficit of the intrinsic muscles of hands.
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