Muscle modes during shifts of the center of pressure by standing persons: effect of instability and additional support

• Published in: Experimental brain research Vol. 157; no. 1; pp. 18 - 31
• Main Authors: Krishnamoorthy, Vijaya, Zatsiorsky, Vladimir M., Latash, Mark L., Scholz, John P.
• Format: Journal Article
• Language: English
• Published: Berlin Springer 01.07.2004; Springer Nature B.V
• Subjects: Adult; Biological and medical sciences; Electromyography - statistics & numerical data; Feedback - physiology; Female; Fingers - innervation; Fingers - physiology; Fundamental and applied biological sciences. Psychology; Hand Strength - physiology; Humans; Hypotheses; Leg - innervation; Leg - physiology; Male; Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration; Muscle Contraction - physiology; Muscle, Skeletal - innervation; Muscle, Skeletal - physiology; Postural Balance - physiology; Posture; Pressure; Principal components analysis; Reflex - physiology; Touch - physiology; Variables; Vertebrates: nervous system and sense organs; Weight-Bearing - physiology; Human; Gripping; Uncontrolled manifold; Load; Support; Stabilization; Electromyogram; Voluntary movement; Striated muscle; Motor control; Synergism; Hip; Multiple regression; Posture; Center of mass; Shoulder; Body movement; Instability; Synergy; Principal component analysis

Muscle synergies in postural tasks have recently been studied using the framework of the uncontrolled manifold (UCM) hypothesis. A set of three hypothetical control variables, named M-modes, derived from the activity of 11 postural muscles, were identified. It was shown that postural synergies compo...