Kuznetsov Nikita A, Riley Michael A
Center for Cognition, Action, & Perception, Department of Psychology, University of Cincinnati, Ohio 45221, USA.
J Mot Behav. 2012;44(4):241-53. doi: 10.1080/00222895.2012.688894. Epub 2012 Jun 6.
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.
在安静站立时，呼吸会对姿势稳定性产生破坏作用。作者进行了一项实验，以评估运动冗余在组织姿势协同作用以补偿呼吸影响方面的作用。他们使用非受控流形方法，测量了姿势链（脚踝、膝盖、臀部、躯干和颈部）主要关节之间协变的运动学模式，该模式是不同呼吸模式（自发、有节奏和增加通气量）以及不同站立指令（静止与放松）的函数。关节变异性的构建是为了保持质心的稳定位置。这一结果支持了以下假设：姿势链的运动冗余在安静站立时对呼吸的灵活补偿中起着重要作用。
