Normal myoelectric signal and its use in functional electrical stimulation in spinal cord injury patients

M. Saccavini, E. Bizzarrini, F. Galassi, E. Dolfo, A. Zampa, A. Cappellazzo, P. Pascolo, M. Franceschini

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this study was to derive a normal myoelectrical signal using surface electrodes and administer it, after suitable amplification, as a stimulation wave to the same source muscle, evaluating the mechanical response. We used an electromyograph connected to an amplifier and we positioned the electrodes onto the skin layers above the muscle mass of the left arm biceps in a subject who was asked to carry out a series of voluntary contractions in isometry using the greatest possible exertion. The surface EMG (EMG_S) pattern that produced the greatest increase in peak force was selected, multiplied n times and injected into the source muscle in order to administer a stimulation trace using more "physiological" methods, thus avoiding the use of excessively fatiguing wave packets when carrying out the gesture. The EMG_S wave derived and subsequently administered to the muscle produced a force which was approximately 40% that produced by voluntary contraction, doubling the voltage. This study was carried out with a view to using the electromyographic surface signal as a suitable stimulus for the excitation of striated skeletal muscle.

Original languageEnglish
Pages (from-to)11-13
Number of pages3
JournalEuropa Medicophysica
Volume37
Issue number1
Publication statusPublished - 2001

Keywords

  • FES
  • Surface EMG (EMG_S)

ASJC Scopus subject areas

  • Rehabilitation

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