Interstimulus Intervals and Sensory Modality Modulate the Impact of a Cognitive Task on Postural Control

被引:3
|
作者
Polskaia, Nadia [1 ]
Lajoie, Yves [1 ]
机构
[1] Univ Ottawa, Sch Human Kinet, Fac Hlth Sci, 125 Univ Ave, Ottawa, ON K1N 6N5, Canada
关键词
cognitive tasks; dual-task; postural control; sensory modality; WORKING-MEMORY; EXTERNAL-FOCUS; DUAL-TASKING; SWAY; ATTENTION; PENETRABILITY; INSTRUCTIONS; VARIABILITY; PERFORMANCE; DIFFICULTY;
D O I
10.1080/00222895.2015.1134435
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The present literature not only reveals the use of a wide variety of cognitive tasks but variability in their interaction with postural control. The question then arises, as to, whether postural control is sensitive to specific features of a cognitive task. The present experiment assessed the impact of cognitive tasks with interstimulus intervals (ISI) of varied duration and sensory modality on postural control in young adults. Seventeen participants (23.71 +/- 1.99years old) were instructed to stand on a force platform while concurrently performing cognitive tasks with ISIs of two and 5s. The tasks were presented both, auditorily and visually. The visual tasks consisted of counting the total occurrence of a single digit. The auditory tasks consisted of counting the total occurrence of a single letter. Performing the cognitive tasks with an ISI of 2s resulted only in an increase in the anteroposterior mean power frequency. Presenting the tasks visually also significantly reduced area of 95% confidence ellipse and AP and mediolateral sway variability. These results may suggest that ISIs can modify postural performance by altering the allocation of attentional focus. Also, presenting tasks using a visual sensory modality appears to yield lower postural sway.
引用
收藏
页码:482 / 488
页数:7
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