Kon Tomoya, Suzuki Chieko, Hotta Ryotaro, Funamizu Yukihisa, Haga Rie, Ueno Tatsuya, Nishijima Haruo, Arai Akira, Nunomura Jinichi, Nukada Hitoshi, Tomiyama Masahiko, Baba Masayuki
Department of Neurology, Aomori Prefectural Central Hospital, 2-1-1 Higashi-Tsukurimichi, Aomori 030-8553, Japan.
The Nukada Institute for Medical & Biological Research, 5-18 Inage-cho, Inage-ku, Chiba 263-0035, Japan.
eNeurologicalSci. 2017 Aug 15;8:38-39. doi: 10.1016/j.ensci.2017.08.003. eCollection 2017 Sep.
The clinical utility of nerve conduction study (NCS) for the distal medial branch of the superficial radial nerve (SRN) has not yet been clarified. Therefore, we investigated the clinical utility of NCS in patients with suspected SRN injury and compared the results with those in healthy control subjects.
Bilateral NCS of the medial branch of the SRN was performed in two patients with suspected injury of the medial branch of the SRN, and in 20 healthy control subjects. A surface recording electrode was placed at the medial side of the metacarpophalangeal joint of the thumb. The SRN was then stimulated at a location 12 cm proximal from the recording electrode.
The mean sensory nerve action potential in the two patients was significantly lower than that of the controls (6.75 ± 0.92 vs. 23.8 ± 8.2 μV, < 0.05). The side-to-side differences in sensory nerve action potential in the two patients were significantly higher than in the controls (55 ± 7.1 vs. 11 ± 7.8%, < 0.05).
NCS may be useful for diagnosing injury of the medial branch of the SRN.
桡神经浅支（SRN）内侧分支的神经传导研究（NCS）的临床效用尚未阐明。因此，我们研究了NCS在疑似SRN损伤患者中的临床效用，并将结果与健康对照者进行比较。
对2例疑似SRN内侧分支损伤的患者和20名健康对照者进行双侧SRN内侧分支的NCS。将表面记录电极置于拇指掌指关节内侧。然后在距记录电极近端12 cm处刺激SRN。
2例患者的平均感觉神经动作电位显著低于对照组（6.75±0.92对23.8±8.2 μV，<0.05）。2例患者感觉神经动作电位的双侧差异显著高于对照组（55±7.1对11±7.8%，<0.05）。
NCS可能有助于诊断SRN内侧分支损伤。
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