| Nerve Conduction Study of the Distal Branches of the Superficial Radial Nerve. |
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Bun, Hye Ryoung , Hwang, Mi Ryoung , Kim, Dong Hwee , Kwon, Eu Ha |
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Department of Rehabilitation Medicine, Korea University College of Medicine, Korea. takefive@korea.ac.kr |
| 원위부 천요골 감각신경의 신경전도검사 |
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번혜령, 황미령, 김동휘, 권유하 |
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고려대학교 의과대학 재활의학교실 |
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| Abstract |
Objective
To acquire normal values of nerve conduction study of the superficial radial sensory nerve (SRN) distal branches to the second web space (2 WEB) and second digit (2 DIG) and compare them with the results of the conventional method.
Method
Forty-three healthy adult subjects (25 males, 18 females) were included. Nerve conduction study was performed in both hands. Superficial radial sensory responses were obtained with 2 recording montages: 1) antidromic stimulation, recording electrode placed between the 2nd and 3rd metacarpals with stimulation 10 cm proximally on the lateral forearm (2 WEB); 2) orthodromic stimulation, stimulation at the second digit with recording 10 cm proximally at the snuff box (2 DIG). Each stimulation was performed twice, and onset latency, peak latency, and sensory nerve action potential (SNAP) amplitude (baseline-to- peak) were measured. Correlations between the values and body mass index (BMI), sex, and finger circumference were tested statistically.
Results
The age of the subjects was 36.0±10.4 years (range, 23∼64 years), and the BMI was 22.6±2.8 kg/m2. The onset latency, peak latency and SNAP amplitude of the 2 WEB response were 1.7±0.1 ms, 2.2±0.2 ms, and 24.6± 8.2μV, respectively. The onset latency, peak latency and SNAP amplitude of the 2 DIG response were 1.6±0.2 ms, 2.2±0.2 ms, and 15.2±6.0μV, respectively. A statistically significant difference was observed between male and female subjects for both 2 WEB and 2 DIG responses. Weak correlations were found between the nerve conduction values and BMI, sex, and finger circumference.
Conclusion
Sensory nerve action potentials can be successfully obtained from the distal branches of the superficial radial nerve. (J Korean Acad Rehab Med 2007; 31: 557-561) |
| Key Words:
Superficial radial nerve, Distal branches, Nerve conduction study |
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