Department of Physical Education, São Paulo State University, Rio Claro, SP, Brazil.
Institute of Physical Activity and Sport Sciences, Cruzeiro do Sul University, São Paulo, SP, Brazil.
J Mot Behav. 2022;54(4):515-522. doi: 10.1080/00222895.2022.2030667. Epub 2022 Feb 1.
Young adults reduce their sway in both light touch (LT) and anchor systems (AS), however, the cognitive involvement in these tasks is unknown. This study investigated postural control in young adults standing upright using either LT or AS, concomitantly with a cognitive task (counting). Nine adults (26 ± 7.4 years) stood in the upright tandem stance with eyes closed, with/without LT, AS (force <2 N), and a cognitive task. The mean sway amplitude of the trunk, right wrist, and shoulder ellipse area, as well as the mean force during LT and AS were obtained. The cognitive task did not influence the magnitude of trunk sway or the mean force in the LT and AS conditions. The trunk sway magnitude was reduced in the AS and even further in LT. Wrist and shoulder variability was larger in the AS than in the LT. Based on these results, we conclude that enhanced sensory cues provided by LT and AS reduce trunk sway with little or no attentional demands.
年轻人在轻触（LT）和锚定系统（AS）中都会减少晃动，然而，这些任务中的认知参与情况尚不清楚。本研究通过同时进行认知任务（计数），调查了年轻人在使用 LT 或 AS 直立站立时的姿势控制。9 名成年人（26±7.4 岁）闭眼，在有/没有 LT、AS（力<2N）的情况下，以直立纵列姿势站立，并进行认知任务。获得了躯干、右腕和肩部椭圆面积的平均摆动幅度，以及 LT 和 AS 期间的平均力。认知任务不会影响躯干摆动幅度或 LT 和 AS 条件下的平均力。AS 会减少躯干摆动幅度，而 LT 则会进一步减少。手腕和肩部的变化在 AS 中比在 LT 中更大。基于这些结果，我们得出结论，增强的 LT 和 AS 提供的感觉线索可以减少躯干摆动，而几乎不需要注意力。
