Effect of a vocal choice reaction time task on the kinematics of the first recovery step after a sudden underfoot perturbation during gait
Effect of a vocal choice reaction time task on the kinematics of the first recovery step after a sudden underfoot perturbation during gait
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DOI：
10.1016/j.gaitpost.2012.06.002
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发表时间：
2013-01-01
期刊：
影响因子：
2.4
通讯作者：
Ashton-Miller, James A.
中科院分区：
文献类型：
--
作者：
Nnodim, Joseph O.;Kim, Hogene;Ashton-Miller, James A.
测试了 32 名健康的年轻人（15 名女性）在存在或不存在并发声音选择反应时间任务的情况下，在不可预测的脚下扰动后保持舒适的步伐模式的能力。定制的仪器鞋被用来随机提供意想不到的内侧或外侧前足扰动，在步态试验的一个站立阶段使中足平均内翻 10 度或平均外翻 9 度。在 30 项步态试验中，有 12 项在左脚和右脚之间随机进行内侧和外侧扰动。重复测量方差分析的结果表明，与未扰动步态的步数参数相比，意外的足底扰动的管理并没有显着导致第一个恢复步骤的步长或宽度的变化。此外，同时进行声音选择反应时间任务和脚下扰动并没有显着影响第一个恢复步骤的运动学。我们得出的结论是，在年轻健康成年人中，意外的 9-10 度脚下扰动，无论是否有声音反应时间任务，都不会影响他们以舒适步态速度行走时的恢复步骤运动学。 (C) 2012 Elsevier B.V. 保留所有权利。
Thirty-two healthy young adults (15 women) were tested for their ability to maintain their comfortable step pattern following an unpredictable underfoot perturbation in the presence and absence of a concurrent vocal choice reaction time task. Custom instrumented shoes were used to randomly deliver an unexpected medial or lateral forefoot perturbation that inverted the mid-foot an average of 10 degrees or everted the midfoot an average of 9 degrees during one stance phase of a gait trial. Medial and lateral perturbations were randomized between left and right feet in 12 of 30 gait trials.The results of the repeated measures analyses of variance show that, compared to the step parameters of unperturbed gait, the administration of the unexpected underfoot perturbation did not significantly lead to alterations in the step length or width of the first recovery step. In addition, the simultaneous administration of a vocal choice reaction time task with the underfoot perturbation did not significantly affect the kinematics of the first recovery step.We conclude that in young healthy adults an unexpected 9-10 degrees underfoot perturbation, with or without a vocal reaction time task, will not affect their recovery step kinematics when walking at a comfortable gait speed. (C) 2012 Elsevier B.V. All rights reserved.