Sensitivity was 10 μV/division, low-frequency filter was 32-Hz, high-frequency filter was 8 kHz, sweep speed was 2 ms/division, and duration of pulse was 0.2 ms. Rate of pulse and the machine used were not specified.
This study was performed in the supine position.
Following the antidromic method [
1], signals were recorded using ring electrodes at digit III (Fig.
1). The active recording electrode (A) was placed on the first interphalangeal joint of digit III (middle finger), 9 cm from the stimulating cathode (−) at midpalm level (S2) along a line pointing to the midline of the distal wrist crease. The reference electrode (R) was positioned 2 cm distally on the second interphalangeal joint of digit III. Ground (G) was placed on the dorsum of the hand (the figure shows the ground electrode placed on the palm).
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