3-D electrical model of a neuroprosthesis stimulator based on the concept of stimulus router system

Mehrangiz Ashiri, Edmond Zahedi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Lost sensory or motor functions can be restored using electrical neural prostheses (NP), which include surface NPs, implanted or subcutaneous NPs and the more recent Stimulus Router System (SRS). The latter type of NP outperforms the other types in its selective excitation and least invasiveness. In each case, the achieved performance depends on a multitude of design factors among which the electrical excitation waveform shape, frequency, duration of pulses, configuration of electrodes, number of intervals, thermal conditions and electrode material. To investigate the effects of these parameters on the distribution of electric current inside biological tissues, numerical modeling can be employed as a powerful computational method. In this work, a 3-D electrical model is proposed to simulate the distribution of electric potentials and currents in the adult human forearm for an SRS NP. At the frequency of 50Hz and for a 5mA square waveform current source, results of our simulation show that the ratio of the current flowing inside the implanted conductor to the current applied to the cathodal electrode (capture ratio) is approximately equal to 2.02%. This value is close to the experimentally reported result for the SRS, 1.9%, giving an absolute error of 0.12% and relative error of 6.3%.

    Original languageEnglish
    Title of host publication2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013
    PublisherIEEE Computer Society
    Pages265-268
    Number of pages4
    DOIs
    Publication statusPublished - 2013
    Event2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013 - Tehran
    Duration: 18 Dec 201320 Dec 2013

    Other

    Other2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013
    CityTehran
    Period18/12/1320/12/13

    Fingerprint

    Neural prostheses
    Routers
    Electric currents
    Electrodes
    Computational methods
    Tissue
    Electric potential

    Keywords

    • COMSOL Multiphysics
    • Neuroprosthesis
    • Simulation
    • SRS

    ASJC Scopus subject areas

    • Biomedical Engineering

    Cite this

    Ashiri, M., & Zahedi, E. (2013). 3-D electrical model of a neuroprosthesis stimulator based on the concept of stimulus router system. In 2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013 (pp. 265-268). [6782232] IEEE Computer Society. https://doi.org/10.1109/ICBME.2013.6782232

    3-D electrical model of a neuroprosthesis stimulator based on the concept of stimulus router system. / Ashiri, Mehrangiz; Zahedi, Edmond.

    2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013. IEEE Computer Society, 2013. p. 265-268 6782232.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Ashiri, M & Zahedi, E 2013, 3-D electrical model of a neuroprosthesis stimulator based on the concept of stimulus router system. in 2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013., 6782232, IEEE Computer Society, pp. 265-268, 2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013, Tehran, 18/12/13. https://doi.org/10.1109/ICBME.2013.6782232
    Ashiri M, Zahedi E. 3-D electrical model of a neuroprosthesis stimulator based on the concept of stimulus router system. In 2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013. IEEE Computer Society. 2013. p. 265-268. 6782232 https://doi.org/10.1109/ICBME.2013.6782232
    Ashiri, Mehrangiz ; Zahedi, Edmond. / 3-D electrical model of a neuroprosthesis stimulator based on the concept of stimulus router system. 2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013. IEEE Computer Society, 2013. pp. 265-268
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