Publications [#60976] of Roger C. Barr

Papers Published

1. Plonsey, R. and Barr, R.C., Electric field stimulation of excitable tissue, IEEE Trans. Biomed. Eng. (USA), vol. 42 no. 4 (1995), pp. 329 - 36 [10.376126]
   (last updated on 2007/04/12)

   Abstract:
   Examines the transmembrane voltage response of an unmyelinated fiber to a stimulating electric field from a point current source. For subthreshold conditions, analytic expressions for the transmembrane potential, v_m, are developed that include the specific effects of fiber-source distance, h, and time from the onset of the stimulus, T. Suprathreshold effects are determined for two examples by extending the analytical results with a numerical model. The v_m, response is a complex evolution in time, especially for small h, that differs markedly from the “activating function”. In general, the subthreshold response is a good predictor of the wave shape of the suprathreshold v_m but a poor predictor of its magnitude. The subthreshold response also is a good (but not a precise) predictor of the region where excitation begins

   Keywords:
   bioelectric phenomena;biological effects of fields;electric field effects;physiological models;