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We studied the variation in the human median nerve activity during ischemia by measuring compound nerve action magnetic fields (CAFs). Temporal increases in the CAF during ischemia were successfully visualized on isofield contour maps. Intense paresthesias were induced after 29 ± 5 s (mean ± SD) of ischemia, which consistently reached a maximum after 4 min 55 ± 12 s. The variations in CAFs were consistent...
We successfully visualized the compound nerve action magnetic fields (CAFs) in the human median and ulnar nerves from the forearm to Erb's point. To observe the CAFs, we used a superconducting quantum interference device gradiometer system that was developed for human peripheral nerves. The CAFs were visualized as a quadrupole pattern consisting of leading and trailing dipoles. The CAFs propagated...
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