| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
The researcher proposed the novel method to measure and estimate muscle stiffness in walking using electrically evoked mechanomyogram and system identification technique. The participant walked on a tread mill and electrical stimulation was applied to the tibias anterior muscle, gastrocnemius, and soleus muscles. The measured signal consisted of evoked and voluntary mechanomyograms, and vibration of walking. The electrically evoked mechanomyogram was extracted and the transfer function from the electrical stimulation to the evoked mechanomyogram was identified using a singular value decomposition method. The tibias anterior muscle stiffness was largest at hell contact and smallest at swing phase. The gastrocnemius and soleus muscle stiffness increased as the walking velocity increased. The implies that the muscle stiffness can store kinetic energy as elastic energy and release the elastic energy in walking.
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