지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Estimation of muscle forces is important in biomechanics, therefore many researchers have tried to build a muscle model. Recently, optimization techniques for adjusting muscle parameters, i.e. EMG-driven model, have been used to estimate muscle forces and predict joint moments. In this study, an EMG-driven model based on the previous studies has been developed and isometric and isokinetic contraction movements were evaluated to validate the developed model. One healthy male participated in this study. The dynamometer tasks were performed for maximum voluntary isometric contractions (MVIC) for ankle dorsi/plantarflexors, isokinetic contraction at both 30°/s and 60°/s. EMGs were recorded from the tibialis anterior, gastrocnemius medialis, gastrocnemius lateralis and soleus muscles at the sampling rate of 1000 Hz. The MVIC trial was used to customize the EMG-driven model to the specific subject. Once the subject's own model was developed, the model was used to predict the ankle joint moment for the other two dynamic movements. When no optimization was applied to characterize the muscle parameters, weak correlations were observed between the model prediction and the measured joint moment with large RMS error over 100% (r = 0.468 (123%) and r = 0.060 (159%) in 30°/s and 60°/s dynamic movements, respectively). However, once optimization was applied to adjust the muscle parameters, the predicted joint moment was highly similar to the measured joint moment with relatively small RMS error below 40% (r = 0.955 (21%) and r = 0.819 (36%) and in 30°/s and 60°/s dynamic movements, respectively). We expect that our EMG-driven model will be employed in our future efforts to estimate muscle forces of the elderly.
목차
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참고문헌 (24)
참고문헌 신청
A.C. Guimaraes / 1995 / The EMG-force relationship of the cat soleus muscle and its association with contractile conditions during locomotion / J.Exp.Biol. 1995 : 975 ~ 987
D.G. Lloyd / 2003 / An EMG-driven musculoskeletal model to estimate muscle forces and knee joint moments in vivo / J.Biomech. 36 : 765 ~ 776
F.E.Zajac / 1989 / Muscle and tendon:properties,models,scaling,and application to biomechanics and motor control / CRC Crit.Rev.Biomed.Eng. 17 : 359 ~ 411
H.S. Milner-Brown / 1973 / Changes in firing rate of human motor units during linearly changing voluntary contractions / J.Phys. 230 : 371 ~ 390
J.A.Friederich / 1990 / Muscle fiber architecture in human lower limb / J.Biomech. 23 : 91 ~ 95
D.G. Lloyd / 2003 / An EMG-driven musculoskeletal model to estimate muscle forces and knee joint moments in vivo / J.Biomech. 36 : 765 ~ 776
F.E.Zajac / 1989 / Muscle and tendon:properties,models,scaling,and application to biomechanics and motor control / CRC Crit.Rev.Biomed.Eng. 17 : 359 ~ 411
H.S. Milner-Brown / 1973 / Changes in firing rate of human motor units during linearly changing voluntary contractions / J.Phys. 230 : 371 ~ 390
J.A.Friederich / 1990 / Muscle fiber architecture in human lower limb / J.Biomech. 23 : 91 ~ 95
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