The effects of dual-tasking on postural control in people with unilateral anterior cruciate ligament injury
The effects of dual-tasking on postural control in people with unilateral anterior cruciate ligament injury
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DOI：
10.1016/j.gaitpost.2009.07.112
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发表时间：
2009-11-01
期刊：
影响因子：
2.4
通讯作者：
Parnianpour, Mohamad
中科院分区：
文献类型：
--
作者：
Negahban, Hossein;Hadian, Mohammad Reza;Parnianpour, Mohamad
一些研究调查了前交叉韧带（ACL）缺陷患者的姿势控制；然而，认知加工（注意）在这些患者的姿势控制中的作用仍不清楚。采用双任务设计来确定并发数字广度记忆任务对ACL患者站立平衡的影响（n = 27），并与一组匹配的健康参与者（n = 27）进行比较。双肢站立时，在受力平台上研究三种不同水平的姿势难度（睁眼刚性面、闭眼刚性面、闭眼泡沫面）。认知条件分为无认知任务、易认知任务和难认知任务三种。对于双肢站立，混合模型方差分析表明，在存在认知任务时，姿势控制受到损害，但认知任务难度与组（ACL或对照组）之间没有相互作用。对于单肢站立，难度越大的认知任务与前后方向速度和相平面肖像的标准差越低有关。在前交叉韧带受伤的患者中，这种认知任务似乎并没有比未受伤的人更大程度地损害姿势控制。未来的研究应检查更严重残疾的前交叉韧带患者，并将其暴露于更苛刻的动态平衡条件下，以进一步探索双任务效应。(C) 2009 Elsevier B.V.版权所有
Several studies have investigated postural control in anterior cruciate ligament (ACL) deficient patients; yet the contribution of cognitive processing (attention) in the postural control of these patients is still unclear. A dual-task design was used to determine the effects of a concurrent digit span memory task on standing balance in a group of ACL patients (n = 27) compared with a group of matched, healthy participants (n = 27). In double limb stance, three levels of postural difficulty were studies on a force platform (rigid surface with eyes open, rigid surface with eyes closed, and foam surface with eyes closed). There were three cognitive conditions (no cognitive task, easy cognitive task and difficult cognitive task). For double limb stance, a mixed model analysis of variance showed that in the presence of a cognitive task, postural control was compromised yet there was no interaction between cognitive task difficulty and group (ACL or control). For single limb stance, the more difficult Cognitive tasks were associated with lower standard deviations for velocity in the antero-posterior direction and the phase plane portraits. This cognitive task did not appear to compromise postural control in ACL injured patients to a greater extent than unimpaired people. Future studies should examine ACL patients with more severe disabilities and expose there to more demanding dynamic balance conditions to further explore dual-tasking effects. (C) 2009 Elsevier B.V. All rights reserved.