Voluntarily controlled but not merely observed visual feedback affects postural sway

PeerJ

article

Shu Imaizumi¹  Tomohisa Asai³  Kentaro Hiromitsu⁴  Hiroshi Imamizu³ 

[1] Graduate School of Arts and Sciences, The University of Tokyo;Japan Society for the Promotion of Science;Cognitive Mechanisms Laboratories, Advanced Telecommunications Research Institute International;Graduate School of Letters, Chuo University;Graduate School of Humanities and Sociology, The University of Tokyo

关键词: Postural control;    Visuomotor;    Intention;    Biofeedback;    Stabilometry;    Sense of control;   

DOI  :  10.7717/peerj.4643

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Online stabilization of human standing posture utilizes multisensory afferences (e.g., vision). Whereas visual feedback of spontaneous postural sway can stabilize postural control especially when observers concentrate on their body and intend to minimize postural sway, the effect of intentional control of visual feedback on postural sway itself remains unclear. This study assessed quiet standing posture in healthy adults voluntarily controlling or merely observing visual feedback. The visual feedback (moving square) had either low or high gain and was either horizontally flipped or not. Participants in the voluntary-control group were instructed to minimize their postural sway while voluntarily controlling visual feedback, whereas those in the observation group were instructed to minimize their postural sway while merely observing visual feedback. As a result, magnified and flipped visual feedback increased postural sway only in the voluntary-control group. Furthermore, regardless of the instructions and feedback manipulations, the experienced sense of control over visual feedback positively correlated with the magnitude of postural sway. We suggest that voluntarily controlled, but not merely observed, visual feedback is incorporated into the feedback control system for posture and begins to affect postural sway.

【 授权许可】

CC BY