Effects of Internal and External Attentional Focus on Postural Response to a Sliding Stance Surface
Effects of Internal and External Attentional Focus on Postural Response to a Sliding Stance Surface
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DOI：
10.1177/0031512519838688
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发表时间：
2019-06-01
影响因子：
1.6
通讯作者：
Hiraoka, Koichi
中科院分区：
文献类型：
--
作者：
Kunimura, Hiroshi;Matsuoka, Masakazu;Hiraoka, Koichi
本研究探讨了内部或外部注意力集中是否会影响被试对姿势性站立扰动的原地脚平衡反应。一个可移动的平台自动向前或向后滑动，而健康的参与者站在上面，（a）不进行任何认知活动（控制），（B）专注于骨盆或上身摇摆（内部焦点），（c）记住平台滑动前立即显示的数字（外部焦点），或（d）保持手臂上不稳定圆柱体的平衡（外部焦点）。当受试者关注骨盆摆动时，平台向前滑动引起的骨盆向前位移较小，但当受试者关注上身摆动时，这种影响不存在，表明当关注骨盆摆动时，内部焦点对姿势反应有效。关于外部注意力集中，当参与者专注于手臂上的不稳定物体的平衡时，平台向前滑动引起的骨盆向前位移较小，但当他们专注于数字时，这种效果不存在，这表明外部注意力集中只有当关注的不稳定物体与自己身体的平衡相关时才有效。没有注意力的干预是有效的，在向后滑动的支持面，表明中央设置为响应姿势扰动取决于姿势扰动的方向。
The present study examined whether an internal or external attentional focus would affect participants' feet-in-place balance response to postural stance perturbations. A movable platform automatically slid forward or backward while healthy participants stood on it and (a) performed no cognitive activity (control), (b) focused on the pelvis or upper body sway (internal focus), (c) memorized a number displayed immediately before the platform slid (external focus), or (d) kept the equilibrium of an unstable cylinder over the arm (external focus). The forward displacement of the pelvis induced by the platform sliding forward was smaller when participants focused on their pelvic sway, although such effect was absent when they focused on their upper body sway, indicating that the internal focus was effective for the postural response when attention was paid to the pelvic sway. Regarding an external attention focus, the forward displacement of the pelvis induced by the platform sliding forward was smaller when participants focused on the equilibrium of an unstable object over the arm, but this effect was absent when they focused on the number, indicating that an external focus was only effective when the unstable object focused upon was relevant to the equilibrium of one's own body. No attentional intervention was effective during backward sliding of the support surface, indicating that central set for responding to postural perturbation depends on the direction of the postural perturbation.