title: Visualization of signal propagation from sciatic nerve to spinal cord in canine.
abstract: The neuroelectric activity that ascends the sciatic nerve and moves to the spinal cord was visualized by measuring the magnetic compound action fields (CAFs) with a superconducting quantum interference device gradiometer. The sciatic nerve of a dog was stimulated electrically, and propagating evoked CAFs were measured non-invasively. Isomagnetic field maps were made on the basis of this data, and the signal propagation was visualized. The evoked magnetic fields presented a quadrupole consisting of two elements: depolarization and repolarization. Measuring the magnetic CAFs of the sciatic nerve on the body surface enabled us to visualize the non-invasively the signal movement continuously from the sciatic nerve to the spinal cord.
authors.affiliation: Media Computing Laboratory, Multimedia Laboratories, NTT DoCoMo Incorporated, Hikarinooka 3-5, Yokosuka, 239-8536, Kanagawa, Japan. lemans@juno.dti.ne.jp
authors.forename: M
authors.initials: M
authors.lastname: Yasuma
authors.forename: T
authors.initials: T
authors.lastname: Mashiko
authors.forename: Y
authors.initials: Y
authors.lastname: Iwase
authors.forename: T
authors.initials: T
authors.lastname: Ikai
authors.forename: M
authors.initials: M
authors.lastname: Nozawa
authors.forename: H
authors.initials: H
authors.lastname: Kurosawa
mesh_terms: D000818:Animals; D004285:Dogs; D004558:Electric Stimulation; D004594:Electrophysiology; D008280:Magnetics / Q000295:instrumentation; D012584:Sciatic Nerve / Q000502:physiology*; D015398:Signal Transduction; D013116:Spinal Cord / Q000502:physiology*