Bioelectricity pp 217-243 | Cite as

Extracellular Fields

  • Robert Plonsey
  • Roger C. Barr

Abstract

We have discussed the generation of local circuit currents as a consequence of membrane activation and the role these currents play in impulse propagation. Because such currents flow into the extracellular medium, they may be detected with extracellular electrodes and even body surface electrodes. The electrocardiogram is a familiar such example: the sources of these body surface potentials are the combined action currents of many cardiac cells.

Keywords

Volume Conductor Dipole Source Field Point Source Density Dipole Strength 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    R. Plonsey, The active fiber in a volume conductor, IEEE Trans. Biomed. Eng. 21: 371–381 (1974).CrossRefGoogle Scholar
  2. 2.
    R. Plonsey, Action potential sources and their volume conductor fields, Proc. IEEE 65:601–611 (1977).CrossRefGoogle Scholar
  3. 3.
    D. L. Deupree and D. J. Jewett, Far field potentials due to action potentials traversing curved nerves, reaching cut ends, crossing boundaries between cylindrical volumes, Electroenceph. Clin. Neuro. 70:355–362 (1988).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Robert Plonsey
    • 1
  • Roger C. Barr
    • 1
  1. 1.Edmund T. Pratt Jr., School of EngineeringDuke UniversityDurhamUSA

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