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Though simple in appearance, postural stabilization is a complex neuromuscular task requiring coordination among multiple joints. Mechanisms of postural stability and control in the body include supraspinal processes responsible for anticipatory postural adjustments (APA) and internal model control, lower level motor servo, and passive viscoelasticity of the musculo-tendon complex (MTC). Nevertheless,...
It has been shown that any movement that satisfies the minimum joint angle jerk constraint can be reproduced by linear combination of 6 consistent Movement Elements (MEs). In this work, we assumed that any given movement is consisted of several successive phases (without overlap) such that each phase satisfies the minimum joint angle jerk constraint. Based on this assumption, we have developed a new...
Many studies of human postural control use data from video-captured discrete marker locations to analyze via complex inverse kinematic reconstruction the postural responses to a perturbation. We propose here that Principal Component Analysis of this marker data provides a simpler way to get an overview of postural perturbation responses. Using short (1, 4, and 16 mm) anterior platform step translations...
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