Department of Kinesiology, Brock University, St. Catharines, Ontario, Canada; School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada.
Department of Kinesiology, Brock University, St. Catharines, Ontario, Canada.
Neurosci Lett. 2020 Jan 18;716:134635. doi: 10.1016/j.neulet.2019.134635. Epub 2019 Nov 18.
Research indicates that threat-induced changes in standing balance are associated with shifts in attention focus. This study investigated whether distracting attention modifies threat-induced changes in standing balance. Twenty-five healthy young adults stood without (No Threat) and with (Threat) the possibility of receiving a temporally unpredictable anteroposterior support surface translation. In both conditions, participants completed a distractor task that consisted of counting how often a pre-selected letter occurred in an auditory sequence, or no distractor task. Emotional responses to threat were quantified using electrodermal activity and self-report measures, while attention focus was quantified using self-report. Centre of pressure (COP) was measured to assess changes in standing balance. Results indicate that postural threat induced an emotional response, as well as broad shifts in attention focus and changes in standing balance. Distracting attention with a cognitive task mitigated threat-induced increases in medium-frequency COP displacements (0.5-1.8 Hz). These results provide support for a relationship between threat-related changes in balance control and attention focus.
研究表明，威胁引起的站立平衡变化与注意力焦点的转移有关。本研究探讨了分散注意力是否会改变威胁引起的站立平衡变化。25 名健康的年轻成年人在没有（无威胁）和有（威胁）可能收到时间不可预测的前后向支撑面平移的情况下站立。在两种情况下，参与者都完成了一个分心任务，即计算一个预先选择的字母在听觉序列中出现的次数，或者没有分心任务。使用皮肤电活动和自我报告测量来量化对威胁的情绪反应，同时使用自我报告来量化注意力焦点。通过测量中心压力（COP）来评估站立平衡的变化。结果表明，姿势威胁会引起情绪反应，以及注意力焦点的广泛转移和站立平衡的变化。用认知任务分散注意力可以减轻威胁引起的中频率 COP 位移（0.5-1.8 Hz）的增加。这些结果支持平衡控制和注意力焦点与威胁相关的变化之间的关系。
