Wrist – Digit I
Surface Recording Technique, Antidromic Study
Sensitivity, low-frequency filter, high-frequency filter, sweep speed, duration of pulse, rate of pulse, and the machine used were not specified.
This study was performed in the supine position.
Following the antidromic method [ 1], ring electrodes were placed over the digit I (thumb) to record median (R1) and radial (R2) sensory nerve action potentials (SNAPs). The active electrode (A) was placed at the base of the digit I, 10 cm from the stimulation points for the median (S1) and radial (S2) nerves at the wrist. The reference (R) was placed on the distal junction between the proximal phalanx and the distal phalanx. Ground (G) electrode position was not specified in the report; the figure shows the ground electrode placed on the palm. Median (R1) and radial (R2) nerve recordings were made separately (Fig. 1).
KeywordsMedian Nerve Radial Nerve Nerve Conduction Study Diabetic Polyneuropathy Sensory Nerve Action Potential
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