Analyse Der Aktivierung Von Denervierten Muskelfasern Im Menschlichen Oberschenkel Bei Fes

Martinek, J.; Reichel, Markus; Rattay, F.; Mayr, W. R.

doi:10.1515/bmte.2003.48.s1.444

Cited by 1 publication

(2 citation statements)

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“…Starting from a 3D model of the human thigh (2), it is possible to calculate the distribution of the electrical field during FES using the method of finite differences, which is based on computer tomography data (3). To examine and optimize the influences of the electrode positions and the simulation parameters, the calculated electric field is analyzed by means of the tool “FES‐Analyze” (4), which was developed with Matlab Guide (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

“…The analysis is based on a model of a denervated muscle fiber, which is applied to every point of the musculature in the electrical field (5). The effect of the distribution of the electrical potential is determined with two forms of the activating function (4,6,7). In one case the end of the muscle fiber is considered, using the first‐order gradient for the evaluation of the potential distribution (“first‐order activating function”—AF1).…”

Section: Methodsmentioning

confidence: 99%

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Analysis of Calculated Electrical Activation of Denervated Muscle Fibers in the Human Thigh

et al. 2005

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Finite difference models of the human thigh are used to analyze the excitation process in the fibers of denervated skeletal muscles in conjunction with functional electrical stimulation (FES) via surface electrodes. The Matlab tool "FES-Analyze" was developed to simulate and analyze the super-threshold regions in a human thigh. Action potential is simulated with a muscle fiber model of the Hodgkin Huxley type and with a generalized form of the activating function. With FES-Analyze it is possible to compare the stimulation at the end of the muscle fiber and the stimulation at the central part of the muscle fiber, both in cross- and longitudinal-section, as well as to observe the effect of different impulse intensities and lengths during FES. Simulating with "Standard Values" of the pulse duration (20 ms) and the amplitude (80 V) one discovers that the main part of the activation takes place at the end of the muscle fiber. To obtain activation at the central part of the muscle fiber, higher amplitudes and longer pulse durations are needed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%