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Current-Distance Relations for Monopolar Electrodes and for Ring Electrodes

  • Frank Rattay

Abstract

For many applications using implanted electrodes, it is important to know how many fibers can be activated by a given current signal. A simple rule is: distant fibers need stronger currents in order to be stimulated, and also the number of firing fibers increases with the strength of stimulation signal. Fig. 8.1 illustrates the current-distance relation from several experiments which were gathered by Ranck (1975). Because there are differences in the original experiments, other durations of current impulses are considered by a correcting factor. The dashed line shows the calculated relation with the assumption that the electrode lies just above a node. Simulation was done with equations 7.2, 7.5 and the Frankenhaeuser-Huxley model.

Keywords

Fiber Diameter Myelinated Fiber Internodal Length Ring Electrode Electrode Current 
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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Copyright information

© Springer-Verlag Wien 1990

Authors and Affiliations

  • Frank Rattay
    • 1
  1. 1.Technical UniversityViennaAustria

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