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The influence of capacitive properties on nerve activation in transcutaneous electrical stimulation

Author(s):

A. Kuhn, T. Keller
Conference/Journal:

International Symposium on Computer Methods in Biomechanics and Biomedical Engineering, Antibes, France, vol. 7
Abstract:

In transcutaneous electrical stimulation, pairs of electrodes are placed on the human body in order to apply current regulated pulses to excitable tissues. The electrical current elicits action potentials in nerve fibers, which lead to muscle contraction. This technology can be used to assist subjects during the rehabilitation after a stroke or a spinal cord injury. For good results precise muscle activations are required. We developed a model that can indicate how the stimulation relates to muscle activation in order to improve muscle selectivity. Finite element (FE) modeling combined with an active nerve model was used to assess the influence of the human anatomy and the tissue properties on the electrical stimulation performance. In contrast to earlier static models not only the resistivity but also the permittivity of the tissues was used in a transient FE simulation. In this paper we focus on the influence of the muscle permittivity and compare it to changes in nerve depth. It was found that for a reasonable range of permittivities of the muscle the capacitive properties can be neglected.

Further Information
Year:

2006
Type of Publication:

(01)Article
Supervisor:

M. Morari

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% Autogenerated BibTeX entry
@InProceedings { KuhKel:2006:IFA_2396,
    author={A. Kuhn and T. Keller},
    title={{The influence of capacitive properties on nerve activation
	  in transcutaneous electrical stimulation}},
    booktitle={International Symposium on Computer Methods in Biomechanics
	  and Biomedical Engineering},
    pages={},
    year={2006},
    address={Antibes, France},
    month=mar,
    url={http://control.ee.ethz.ch/index.cgi?page=publications;action=details;id=2396}
}
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