Effect of sub-optimal neuromotor control on the hip joint load during level walking

摘要: Skeletal forces are fundamental information in predicting the risk of bone fracture. The neuromotor control system can drive muscle with various task- and health-dependent strategies but current modelling techniques provide a single optimal solution load sharing problem. aim present work was to study variability hip magnitude due sub-optimal using subject-specific musculoskeletal model. model generated from computed tomography (CT) dissection data cadaver. Gait kinematics, ground electromyographic (EMG) signals were recorded on body-matched volunteer. Model results validated by comparing traditional optimisation published measurements EMG signals. space instantaneous equilibrium problem during first peak resulted 105 dynamically equivalent configurations control. expressed multiples body weight (BW). Sensitivity boundaries uncertainty tetanic stress (TMS) also addressed. induced 3.3 BW. Sub-optimal controls up 8.93 Reducing TMS maximum minimum lower boundary varied moderately whereas upper considerably 4.26 Further studies necessary assess how far degrade activation pattern understand which clinically plausible. However we consider possibility that activations muscular play role spontaneous fractures not associated falls.