Impedance and Current Distribution

  • J. Patrick Reilly


This chapter examines tissue and body impedance as it affects the evaluation of electrical stimulation. It is concerned generally with current levels exceeding 100μA, and voltage levels exceeding 1 V. As a result, many of the special problems associated with characterizing the body’s response to microampere currents or millivolt potentials will not be relevant. For a thorough discussion of impedance in biological measurements at very low voltages and currents, the reader is directed to the work of Geddes (1972).


Contact Resistance Current Distribution Current Path Skin Impedance Initial Voltage 
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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • J. Patrick Reilly
    • 1
    • 2
  1. 1.Applied Physics LaboratoryJohns Hopkins UniversityUSA
  2. 2.Metatec AssociatesSilver SpringUSA

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