Force direction pattern stabilizes sagittal plane mechanics of human walking.

摘要: The neural control and mechanics of human bipedalism are inadequately understood. variable at the interface body that is key to upright posture during walking force ground on foot (ground reaction force, F). We present a model predicts sagittal plane F direction as passing through divergent point (DP) fixed in reference frame attached person. Four frames were tested identify which provided simplest most accurate description direction. For all frames, DP predicted nearly observed variation whole angular momentum single leg stance. with vertical orientation origin pelvis best combination accuracy simplicity. was located higher than CM produced pattern torque about caused pitch oscillations disrupted posture. Despite those oscillations, evidence stability mechanism may be critical component enabling humans remain while performing other tasks.