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Titolo:
REDUCING MUSCLE FATIGUE IN FES APPLICATIONS BY STIMULATING WITH N-LETPULSE TRAINS
Autore:
KARU ZZ; DURFEE WK; BARZILAI AM;
Indirizzi:
MIT,DEPT ELECT ENGN CAMBRIDGE MA 02139 UNIV MINNESOTA,DEPT MECH ENGN MINNEAPOLIS MN 55455 STANFORD UNIV,DEPT MECH ENGN STANFORD CA 94305
Titolo Testata:
IEEE transactions on biomedical engineering
fascicolo: 8, volume: 42, anno: 1995,
pagine: 809 - 817
SICI:
0018-9294(1995)42:8<809:RMFIFA>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
NON-LINEAR SUMMATION; SPINAL-CORD INJURY; SINGLE MOTOR UNITS; ELECTRICAL-STIMULATION; EXCITATION-FREQUENCY; NERVE-STIMULATION; VOLUNTARY TREMOR; CAT MUSCLES; CONTRACTIONS; RECRUITMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
63
Recensione:
Indirizzi per estratti:
Citazione:
Z.Z. Karu et al., "REDUCING MUSCLE FATIGUE IN FES APPLICATIONS BY STIMULATING WITH N-LETPULSE TRAINS", IEEE transactions on biomedical engineering, 42(8), 1995, pp. 809-817

Abstract

Applications of electrical stimulation for restoration of functional movements such as standing, gait, and grasp have always been hindered by the rapid fatigue of stimulated muscle. This paper describes an experimental investigation of stimulation with N-lets (a set of N closelyspaced stimulation pulses) as a means of producing contractions with improved fatigue characteristics. Experiments were conducted on 27 able-bodied and four SCI human subjects using surface stimulation of the quadriceps muscle to produce isometric knee joint torque. Based upon evidence from the literature on muscle fatigue, parameters of the N-lettrains for N = 1-6 were optimized to produce the most force per pulse. The results demonstrated that: 1) nonlinear summation of the twitch response occurs in human subjects with N-let surface stimulation; 2) for most subjects, doublet stimulation (N = 2) with a pulse interval ofabout 5 ms produced the maximum torque-time integral per pulse of theresulting twitch; and 3) on average, optimal N-let stimulation resulted in a 36% increase in isometric torque tracking when compared to traditional singlet stimulation. The results have immediate implications for alleviating the problem of premature fatigue during functional electrical stimulation.

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Documento generato il 06/07/20 alle ore 05:47:35