Download or read book An EMG-driven Model to Investigate Contraction of Lower Extremity Muscles During Gait written by Tasos Karakostas and published by . This book was released on 2001 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Individual muscle force profiles were predicted for selected muscles of the lower limb using three subjects during normal walking. Model validation was performed against estimated net joint moments from inverse dynamics. Estimated gains were within physiological range, and a good match was obtained between moment curves. Correlations ranged from 0.73 to 0.97 for the gait trials and RMS differences between 22.2 and 12.99 Nm for the knee and ankle joints individually. Expressed relative to the peak measured moments during gait, the RMS differences ranged from 13.71 to 15.33 percent at the ankle, and 24.95 to 45.58 percent at the knee. The results were similar or better than those previously reported. Cocontraction indexes were higher during events in the gait cycle that required stability and control at the joint. This model provides a solid foundation for further improvements that are discussed. The results support the feasibility of using the proposed model, as a potential solution to the interdeterminancy problem providing solutions to muscle forces involved in normal human movement, and a cocontraction index to assess muscle balance during gait.