A newly developed EMS unit: some preliminary results demonstrating its efficacy

An electromyostimulation (EMS) unit that provides a range of stimulation variables was developed and used in a preliminary study of the current-torque relationship during percutaneous EMS. The knee extensors of one lower limb of ten subjects received stimulation on three different days, and the curr...

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Bibliographic Details
Main Authors: Duvoisin, M.R., Reed, H.E., Doerr, D.F., Dudley, G.A., Buchanan, P.
Format: Conference Proceeding
Language:English
Subjects:
Knee
Medical services
Muscles
Protocols
Pulse amplifiers
Pulse modulation
Pulse shaping methods
Pulse transformers
Shape
Torque
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Summary:An electromyostimulation (EMS) unit that provides a range of stimulation variables was developed and used in a preliminary study of the current-torque relationship during percutaneous EMS. The knee extensors of one lower limb of ten subjects received stimulation on three different days, and the current-torque relationship was studied using an incremental protocol. A 2-s train of 500- mu s/sup 2/ monophasic pulses at 60 Hz was used to elicit one contraction every minute. Peak current and peak torque values among subjects ranged from 229 to 344 mA and from 61% to 106% of a given subject's maximum voluntary isometric torque. The EMS unit consistently elicits torque during stimulated contractions, providing a basis for evaluating the efficacy of a wide range of stimulation protocols.< >
DOI:10.1109/IEMBS.1988.94900