Performance of epimysial stimulating electrodes in the lower extremities of individuals with spinal cord injury

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
J P UhlirC Bieri

Abstract

This study describes the performance of surgically-implanted epimysial stimulating electrodes in the muscles of the lower extremities for use in functional neuromuscular stimulation (FNS) systems for standing after spinal cord injury. A total of 86 epimysial electrodes were implanted in 13 volunteers with low tetraplegia or paraplegia receiving the Case Western Reserve University/Veteran Affairs (CWRU/VA)-implanted standing/transfer neuroprosthesis. The neuroprosthesis consisted of bilateral epimysial electrodes in the knee and hip extensors (vastus lateralis, gluteus maximus, and adductor magnus or semimembranosus) and intramuscular electrodes at the T12/L1 or L1/L2 spinal roots for trunk extension. Recruitment properties, stimulated knee and hip extension moments, standing performance, and mechanical integrity over time were measured for a period up to four years post-implantation. Stimulated thresholds were stable and recruitment was sufficient to generate joint moments adequate for standing, with up to 97% body weight supported by the legs. Four mechanical failures were observed, all in the posterior muscles of the thigh, leaving 95% of all electrodes operational at all followup intervals. Probability of 24-month survival i...Continue Reading

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Citations

May 1, 2013·Archives of Physical Medicine and Rehabilitation·Ronald J TrioloMusa L Audu
Nov 11, 2009·Journal of Neural Engineering·K H PolasekD J Tyler
Mar 9, 2010·Journal of Neural Engineering·M A SchieferD J Tyler
Jun 22, 2012·Biomedical Engineering Online·Max Ortiz-CatalanJean Delbeke
Jul 10, 2012·Journal of Rehabilitation Research and Development·Raviraj NatarajRonald J Triolo
Apr 12, 2008·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Matthew A SchieferDustin J Tyler
Nov 8, 2008·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Lee E FisherRonald J Triolo
Oct 7, 2010·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Raviraj NatarajRonald J Triolo
Jun 29, 2004·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Sahana N Kukke, Ronald J Triolo
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