NDLI: Effects of strong static magnetic fields on nerve excitation

Content Provider	IEEE Xplore Digital Library
Author	Sekino, M. Tatsuoka, H. Eguchi, Y. Ueno, S.
Copyright Year	2006
Description	Author affiliation: Univ. of Tokyo, Tokyo (Sekino, M.)
Abstract	Recent advances in superconducting magnet for medical equipments and for magnetic levitation gave rise to the importance of understanding biological effects of strong static magnetic fields. While the effects of pulsed or time-varying magnetic fields on the nervous system are relatively clear, the effects of static magnetic fields on the nervous system largely remain to be understood. In the present study, we investigated the effects of strong static magnetic fields of up to 8 T on action potentials of the rat sciatic nerve. Male Wistar rats were anesthetized with ether and urethane. A skin incision was made on the left hindlimb, and the muscle was separated to expose the sciatic nerve. A pair of platinum needle electrodes was inserted beneath the skin of the heel for applying electrical stimulations. The action potentials were recorded under static magnetic fields of 0 T, 2 T, 4 T, 6 T, and 8 T. The signal-to-noise ratio was improved by averaging 10 repetitive recordings. Results indicated that the exposure to strong static magnetic fields enhanced excitation of the rat sciatic nerve. Expected mechanisms for the enhancement of nerve excitation were structural changes in ion channels due to magnetic force, and Lorentz force acting on migrating ions.
Starting Page	551
Ending Page	551
File Size	105979
Page Count	1
File Format	PDF
ISBN	1424414792
DOI	10.1109/INTMAG.2006.376275
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Intermag Conference
Subject Keyword	Nervous system Skin Magnetic fields Superconducting magnets Biomedical equipment Magnetic levitation Time varying systems Rats Muscles Platinum
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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