Abstract
Accurate, quantitative assessment of nerve function during surgical procedures has been impeded by inherent limitations of extracellular electrophysiological recording techniques. Extracellular recordings are hampered by critical constraints on electrode placement, uncertainty in the conductivity of the moist layer on the outside of the nerve, and the risks involved in the essential elevation of the nerve in the air for recording. Our laboratory has developed a neuromagnetic current probe system that affords room- or body-temperature recording of magnetic signals as small as one millionth of the earth’s magnetic field strength. In addition, we have designed and constructed an ‘openable,’ toroidal magnetic probe that can be placed around a nerve to assess the magnetic field arising from the electrical current flow within the active axons and across their membranes. A mathematical deconvolution model allows determination of the types and number of axons contributing to a compound nerve signal. Wikswo (1989) lists key references.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Buchthal, F. and Rosenfalk, A., 1966, Sensory potentials and conduction velocity in human sensory nerves, Brain Res., 3:1–122.
Hammer, C., 1982, “Nerve Conduction Studies,” C.C.Thomas, Springfield, IL
Kimura, J., 1978, Method for determining median nerve conduction velocity across the carpal tunnel, J. Neurol. Sci., 38:1–10.
Kimura, J., 1984, Nerve conduction studies and electromyography, in: “Peripheral Neuropathy,” P. J. Dyck, P. K. Thomas, E.H. Lambert, and R. Bunge, eds., W. B. Saunders, Philadelphia.
Rorabeck, C. H., 1980, Tourniquet-induced nerve ischemia: an experimental investigation, J. Trauma, 20:280–286.
Wiederholt, W. C., 1970, Threshold and conduction velocity in isolated mixed mammalian nerves, Neurology (Minneap.), 20:347–352.
Wijesinghe, R.S., Gielen, F.L.H. and Wikswo, J.P., Jr., 1989, (submitted).
Wikswo, J.P., Jr., 1988, Magnetic techniques for evaluating peripheral nerve function, in: “Proceedings of a Special Symposium on Maturing Technologies and Emerging Horizons in Biomedical Engineering,” J. B. Myklebust, and G. F. Harris, eds., IEEE, Pistcataway, NJ.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Plenum Press, New York
About this chapter
Cite this chapter
Wikswo, J.P. et al. (1989). Intraoperative Recording of the Magnetic Field of a Human Nerve. In: Williamson, S.J., Hoke, M., Stroink, G., Kotani, M. (eds) Advances in Biomagnetism. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0581-1_21
Download citation
DOI: https://doi.org/10.1007/978-1-4613-0581-1_21
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-7876-4
Online ISBN: 978-1-4613-0581-1
eBook Packages: Springer Book Archive