Journal ArticleDOI
Postural coordination modes considered as emergent phenomena
TLDR
In this article, the coordination of multiple body segments (torso and legs) in the control of standing posture during a suprapostural task was studied, motivated by dynamical theories of motor coordination.Abstract:
The coordination of multiple body segments (torso and legs) in the control of standing posture during a suprapostural task was studied. The analysis was motivated by dynamical theories of motor coordination. In 2 experiments it was found that multisegment postural coordination could be described by the relative phase of rotations around the hip and ankle joints. The effective length of the feet, the height of the center of mass, and the amplitude of head motions in a visual tracking task were varied. Across these variations, 2 modes of hip-ankle coordination were observed: in-phase and anti-phase. The emergence of these modes was influenced by constraints imposed by the suprapostural tracking task, supporting the idea that such tasks influence postural control in an adaptive manner. Results are interpreted in terms of a dynamical approach to coordination in which postural coordination modes can be viewed as emergent phenomena.read more
Citations
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Journal ArticleDOI
Techniques and Methods for Testing the Postural Function in Healthy and Pathological Subjects.
Thierry Paillard,Frédéric Noé +1 more
TL;DR: The aim of this review was to present and justify the different testing techniques and methods with their different quantitative and qualitative variables to make it possible to precisely evaluate each sensory, central, and motor component of the postural function according to the experiment protocol under consideration.
Journal ArticleDOI
Control and estimation of posture during quiet stance depends on multijoint coordination.
TL;DR: The results reveal a control strategy involving coordinated variations of most major joints to stabilize variables important to postural control during quiet stance.
Journal ArticleDOI
Modulating postural control to facilitate visual performance
TL;DR: The results support the hypothesis that postural control is not an autonomous system, but is organized as part of an integrated perception–action system that can be used to improve visual performance.
Journal ArticleDOI
A unified view of quiet and perturbed stance: simultaneous co-existing excitable modes.
TL;DR: Evidence that a single-segment characterization of quiet stance is inadequate is presented, and the coexistence of in-phase and anti-phase patterns during quiet stance suggests that the ankle and hip strategies are not extremes along a behavioral continuum of mixed strategies.
Journal ArticleDOI
On specification and the senses.
TL;DR: It is argued that physical motion relative to different referents is specified only in the global array, which consists of higher-order relations across different forms of energy, and poses a challenge to traditional, inference-based theories of perception and cognition.
References
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Journal ArticleDOI
Handbook of Physiology.
TL;DR: This is the first volume of the proposed many-sectioned "Handbook" in which the American Physiological Society intends to present comprehensively the entire field of physiology.
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.
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