Spatial and temporal frequency-dependent conductivities in volume- conduction calculations for skeletal muscle. (English) Zbl 0637.92004
Summary: Impedance measurements using the four-electrode technique have revealed that the effective electrical conductivity of skeletal muscle is anisotropic and depends upon the temporal frequency and the distance between the current-passing electrodes. To incorporate these effects into a volume-conduction calculation, the conductivity must depend on both the temporal and spatial frequencies.
We report calculations of the electric potential produced by a single active muscle fiber embedded in skeletal-muscle tissue, and discuss the implications of the dependence of the conductivity on the spatial frequency for both skeletal-muscle electromyograms and compound action potentials in nerve bundles.
We report calculations of the electric potential produced by a single active muscle fiber embedded in skeletal-muscle tissue, and discuss the implications of the dependence of the conductivity on the spatial frequency for both skeletal-muscle electromyograms and compound action potentials in nerve bundles.
MSC:
| 92Cxx | Physiological, cellular and medical topics |
| 78A70 | Biological applications of optics and electromagnetic theory |
Keywords:
Impedance measurements; four-electrode technique; effective electrical conductivity of skeletal muscle; volume-conduction calculation; electric potential; spatial frequency; skeletal-muscle electromyograms; action potentials in nerve bundlesReferences:
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