Wide-range visualization of compound nerve action magnetic fields in the human median and ulnar nerves from the forearm to Erb's point.
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 along the anatomical pathway and extended longitudinally in the proximal segment. The most reasonable explanation is that the peak separation in the trailing dipole appeared when the leading dipole reached the proximal segment after stimulation of the median nerve at the wrist. A temporal dispersion of the CAFs was suggested to be visualized.
Nakanishi
Kazuyoshi
K
Department of Orthopaedic Surgery, Programs for Applied Biomedicine, Division of Clinical Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan. kazn@hiroshima-u.ac.jp
Mashiko
Takunori
T
Fujimoto
Yoshinori
Y
Tanaka
Nobuhiro
N
Iwase
Yoshiyuki
Y
Ishida
Osamu
O
Ochi
Mitsuo
M
D000328:Adult; D004558:Electric Stimulation; D004574:Electromagnetic Fields; D004594:Electrophysiology / Q000295:instrumentation / Q000379:methods; D005260:Female; D005542:Forearm / Q000294:innervation* / Q000502:physiology; D006801:Humans; D008280:Magnetics / Q000295:instrumentation; D008297:Male; D008475:Median Nerve / Q000502:physiology*; D009431:Neural Conduction / Q000502:physiology; D014459:Ulnar Nerve / Q000502:physiology*