Journal ArticleDOI
Importance of body sway velocity information in controlling ankle extensor activities during quiet stance
TLDR
The findings suggest that the actual postural control system during quiet stance adopts a control strategy that relies notably on velocity information and that such a controller can modulate muscle activity in anticipatory manner without using a feed-forward mechanism.Abstract:
In literature, it has been suggested that the CNS anticipates spontaneous change in body position during quiet stance and continuously modulates ankle extensor muscle activity to compensate for the...read more
Citations
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Journal ArticleDOI
Calf muscle-tendon properties and postural balance in old age
TL;DR: The hypothesis that compromised postural balance in older subjects is associated with changes in calf muscle-tendon physiological and mechanical properties is tested and may explain the majority of the variance in balance performance during tasks more difficult than habitual bipedal stance.
Journal ArticleDOI
Human postural sway results from frequent, ballistic bias impulses by soleus and gastrocnemius
TL;DR: It is suggested that standing is a skilled, trial and error activity that improves with experience and is automated (possibly by the cerebellum), complement and extend the recent demonstration that paradoxical muscle movements are the norm in human standing.
Journal ArticleDOI
Controlling human upright posture: velocity information is more accurate than position or acceleration.
TL;DR: The hypothesis that velocity information is the most accurate form of sensory information used to stabilize posture during quiet stance is supported by results that are consistent with the assumption that changes in sway behavior resulting from commonly used experimental manipulations are primarily attributed to loss of accurate velocity information.
Journal ArticleDOI
A model of postural control in quiet standing: robust compensation of delay-induced instability using intermittent activation of feedback control.
Yoshiyuki Asai,Yuichi Tasaka,Kunihiko Nomura,Taishin Nomura,Maura Casadio,Pietro Morasso,Pietro Morasso +6 more
TL;DR: Different from the standard continuous model, whose PSD function is similar to an over-damped second order system without a resonance, the intermittent control model is capable to exhibit the two power law scaling regimes that are typical of physiological sway movements in humans.
Journal ArticleDOI
Human Postural Control.
TL;DR: The neuromechanical basis of habitual posture and various concepts that were rather influential in many experimental studies and mathematical models of human posture control are considered.
References
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Book
Biomechanics and Motor Control of Human Movement
TL;DR: The Fourth Edition of Biomechanics as an Interdiscipline: A Review of the Fourth Edition focuses on biomechanical Electromyography, with a focus on the relationship between Electromyogram and Biomechinical Variables.
Journal ArticleDOI
Central programming of postural movements: adaptation to altered support-surface configurations.
Fay B. Horak,L. M. Nashner +1 more
TL;DR: Exposing subjects to horizontal surface perturbations while standing on support surfaces intermediate in length between the shortest and longest elicited more complex postural movements and associated muscle activation patterns that resembled ankle and hip strategies combined in different temporal relations.
Journal ArticleDOI
Stiffness Control of Balance in Quiet Standing
TL;DR: A relatively simple control scheme for regulation of upright posture that provides almost instantaneous corrective response and reduces the operating demands on the CNS is proposed.
Book
Exercise : regulation and integration of multiple systems
TL;DR: This paper presents a meta-analyses of the cellular, molecular and Metabolic Basis of Muscle Fatigue, and discusses the role of Exercise in the development of Neural Control of Movement.
Journal ArticleDOI
Open-loop and closed-loop control of posture: A random-walk analysis of center-of-pressure trajectories
James J. Collins,C. J. De Luca +1 more
TL;DR: This work strongly supports the position that much can be learned about the functional organization of the postural control system by studying the steady-state behavior of the human body during periods of undisturbed stance.