Low-frequency filter was 0.1 Hz, high-frequency filter was 2 kHz, sweep speed was 1 ms/division, duration of pulse was 0.1 ms, rate of pulse was 1/s, and the machines used were a Grass S8 stimulator and a dual-beam Tektronix 565 oscilloscope. Sensitivity was not specified.
This study was performed in the supine position.
Following the orthodromic method [
1], signals were recorded on the course of the median nerve (Fig.
1): on the palm (distal to the carpal tunnel, R1) and at the wrist (proximal to the carpal tunnel, R2, R3). Interelectrode distances were as follows: the cathode to the electrode distal to the carpal tunnel (R1), mean 7.81 cm (range 6.5–10.5 cm); the cathode to the electrode proximal to the carpal tunnel (R2), mean 12.15 cm (range 9.95–14.6 cm); across the carpal tunnel (R1–R2), mean 3.8 cm (range 2.75–4.7 cm); and between electrodes proximal to the carpal tunnel (R2–R3), mean 1.94 cm (range 1.85–2.15 cm). Sensory nerve action...
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Wiederholt WC (1970) Median nerve conduction velocity in sensory fibers through carpal tunnel. Arch Phys Med Rehabil 51:328–330PubMedGoogle Scholar