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Field Theory as it Pertains to Sep Analysis

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Neural Monitoring

Part of the book series: Neurotrauma ((NT))

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Abstract

The near-field potential (NFP) and far-field potential (FFP) distinguish two different manifestations of the volume conducted field (Jewett and Williston, 1971). The NFP represents the propagating action potential as detected when the impulse passes under the pick-up electrodes, whereas the FFP relates to a stationary potential generated by the signal away from the recording site. A bipolar derivation, used in conventional nerve conduction studies, registers primarily, though not exclusively, NFP from the axonal volley along the course of the nerve. In contrast, a referential montage preferentially detects FFP, although it may also register NFP, if the impulse passes near the electrodes. The far-field recording has gained popularity in the study of evoked potentials for detection of a voltage source generated at a distance (Allison, Wood, McCarthy et al., 1982; Celesia, 1985; Chiappa, Choi and Young, 1980; Cracco, 1972; Cracco and Cracco, 1976; Desmedt and Cheron, 1981, 1983; Desmedt, Huy and Carmeliet, 1983; Eisen, 1982; Emerson and Pedley, 1984; Emerson, Seyal and Pedley 1984; Luders, Dinner, Lesser et al., 1983; Luders, Lesser, Hahn et al., 1983; MacCabee, Pinkhasov and Cracco, 1983).

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Authors and Affiliations

  1. Division of Clinical Electrophysiology, University of Iowa Hospitals & Clinics, Iowa City, IA, 52242, USA

    Jun Kimura M. D.

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  1. Jun Kimura M. D.
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Editors and Affiliations

  1. Spinal Trauma Research Program, Alfred I. duPont Institute of the Nemours Foundation, Wilmington, DE, USA

    Steven K. Salzman

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© 1990 Springer Science+Business Media New York

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Kimura, J. (1990). Field Theory as it Pertains to Sep Analysis. In: Salzman, S.K. (eds) Neural Monitoring. Neurotrauma. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-4612-0491-6_1

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  • DOI: https://doi.org/10.1007/978-1-4612-0491-6_1

  • Publisher Name: Humana Press, Totowa, NJ

  • Print ISBN: 978-1-4612-6786-7

  • Online ISBN: 978-1-4612-0491-6

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