An implantable two channel drop foot stimulator: initial clinical results

Laurence Kenney, Gerrit Bultstra, Rik Buschman, Paul Taylor, Geraldine Mann, Hermie Hermens, Jan Holsheimer, Anand V. Nene, Martin Tenniglo, Hans van der Aa, John Hobby

    Research output: Contribution to journalArticleAcademicpeer-review

    44 Citations (Scopus)


    This article reports preliminary results of pilot studies of a new implantable two channel drop foot stimulator. The stimulator consists of an externally worn transmitter inductively coupled to an implanted receiver unit located in the lower leg, lateral and distal to the knee. The receiver is connected to electrodes located under the epineurium of the deep and the superficial peroneal nerves. Stimulation is triggered by detection of heel lift and terminated at heel strike in a manner similar to surface mounted systems. The location of the electrodes allows for a degree of selectivity over the resultant moment about the ankle joint that is not possible with surface stimulation of the common peroneal nerve. The two subjects used the stimulator on a regular basis and showed increases in walking speed of between 10% and 44% when compared to their baseline measurements. Isometric tests have demonstrated that the stimulator allows selective and repeatable stimulation of ankle joint muscles.
    Original languageEnglish
    Pages (from-to)267-270
    Number of pages4
    JournalArtificial organs
    Issue number3
    Publication statusPublished - 2002


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