Mixed Nerve Conduction Study of Brachial Plexus and Its Application on the Diagnosis of Brachial Plexus Lesion

臂神經叢正中神經部分及尺骨神經部分混合神經傳導測量以及其在上臂神經叢傷害診斷上之應用

Jo-Tong Chen(陳若佟) ； Shu-Min Chen(程琡敏) ； Thy-Sheng Lin(林志勝) ； Ta Shen Kuan(官大紳) ； Chang-Zern Hong(洪章仁)

《中華民國復健醫學會雜誌》 25卷1期 (1997/06) Pp. 57-63

摘要

This study demonstrates a technique to measure the mixed nerve conduction velocity (MNCV) of the ulnar and median component of the brachial plexus and its application on the diagnosis of brachial plexus lesion. Twenty patients with clinically confirmed pectoralis minor syndrome (Group I) and ten patients with traumatic brachial plexus injury due to traffic accident (Group II) were studied. The ulnar nerve was stimulated at the ulnar groove and the median nerve stimulated at the antecubital fossa of the elbow. The averaged nerve action potentials were simultaneously recorded from both axilla and Erb’s point with surface recording electrodes. MNCV of the ulnar and median components of the brachial plexus between the Erb’s point and axilla (clavicular segment) were calculated. It was found that MNCV of the ulnar component of brachial plexus was 40.31±2.75 m/sec (35.3±44.3 m/sec) on the affected side, and 60.43±4.67 m/sec (54.2±69.4 m/sec) on the unaffected side in group I patients. In group II patients, there was no significant difference in MNCV between the affected and unaffected sides for either ulnar or median component of brachial plexus. It is concluded that measurement of MNCV of the brachial plexus is a valuable technique in the diagnosis of brachial plexus entrapment lesion, such as pectoralis minor syndrome, but less sensitive to detect a traumatic brachial plexus lesion with axonal loss.

關鍵字

臂神經叢,神經傳導,胸小肌症候群

並列摘要

This study demonstrates a technique to measure the mixed nerve conduction velocity (MNCV) of the ulnar and median component of the brachial plexus and its application on the diagnosis of brachial plexus lesion. Twenty patients with clinically confirmed pectoralis minor syndrome (Group I) and ten patients with traumatic brachial plexus injury due to traffic accident (Group II) were studied. The ulnar nerve was stimulated at the ulnar groove and the median nerve stimulated at the antecubital fossa of the elbow. The averaged nerve action potentials were simultaneously recorded from both axilla and Erb’s point with surface recording electrodes. MNCV of the ulnar and median components of the brachial plexus between the Erb’s point and axilla (clavicular segment) were calculated. It was found that MNCV of the ulnar component of brachial plexus was 40.31±2.75 m/sec (35.3±44.3 m/sec) on the affected side, and 60.43±4.67 m/sec (54.2±69.4 m/sec) on the unaffected side in group I patients. In group II patients, there was no significant difference in MNCV between the affected and unaffected sides for either ulnar or median component of brachial plexus. It is concluded that measurement of MNCV of the brachial plexus is a valuable technique in the diagnosis of brachial plexus entrapment lesion, such as pectoralis minor syndrome, but less sensitive to detect a traumatic brachial plexus lesion with axonal loss.

並列關鍵字

brachial plexus,nerve conduction,thoracic outlet syndrome