Effects of breathing on multijoint control of center of mass position during upright stance.
Breathing exerts destabilizing effects on postural stability during quiet stance. The authors conducted an experiment to evaluate the role of motor abundance in the organization of the postural synergy compensating for the effects of breathing. They measured the kinematic pattern of covariation among the major joints of the postural chain (ankle, knee, hip, trunk, and neck) as a function of different breathing modes (spontaneous, paced, and increased volume) and different stance instructions (still vs. relaxed) using the uncontrolled manifold approach. Joint variability was structured to preserve the stable position of the center of mass. This result supports the hypothesis that motor abundance of the postural chain plays an important role in the flexible compensation for breathing during quiet stance.
Center for Cognition, Action, & Perception, Department of Psychology, University of Cincinnati, Ohio 45221, USA. kuznetna@mail.uc.edu
Nikita A
NA
Kuznetsov
Michael A
MA
Riley
D000843:Ankle Joint; D001696:Biomechanical Phenomena; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D007596:Joints / Q000502:physiology*; D007719:Knee Joint; D008297:Male; D011187:Posture / Q000502:physiology*; D012119:Respiration; D015656:Respiratory Mechanics / Q000502:physiology*; D055815:Young Adult