Wrist – Digit II, Wrist – Dorsal Hand
Surface Recording Technique, Antidromic Study
The machine used was a Medelec MS92a electromyograph. Sensitivity, low-frequency filter, high-frequency filter, sweep speed, duration of pulse, and rate of pulse were not specified.
This study was performed in the supine position.
Following the antidromic method [ 1], the surface electrodes were placed over digit II (index finger) and over digit I (thumb) to record the median (R1) and superficial radial (R2) sensory nerve action potentials (SNAPs), respectively (Fig. 1). For the median nerve recording (R1), the electrodes were placed at 14 cm distance from the stimulating electrodes at the wrist. Exact active (A) and reference (R) electrode positions were not specified in the text. For the superficial radial nerve recording (R2), the electrodes were placed over the skin of the dorsal hand between the first and second metacarpal areas at a 10 cm distance from the stimulating electrodes at the wrist. The ground (G) electrode position was not specified...
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