Spatial orientation of attention and obstacle avoidance following concussion
Spatial orientation of attention and obstacle avoidance following concussion
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DOI：
10.1007/s00221-008-1669-1
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发表时间：
2009-03-01
影响因子：
2
通讯作者：
Chou, Li-Shan
中科院分区：
文献类型：
--
作者：
Catena, Robert D.;van Donkelaar, Paul;Chou, Li-Shan
在从最初的脑震荡恢复过程中对大脑的再损伤导致永久性脑损伤或死亡的可能性增加。从脑震荡中恢复被认为是持续的，甚至长达一个月后受伤。本研究的目的是调查最近遭受脑震荡（mTBI）超过一个月后受伤的个体在步态中注意力的视觉空间定向和避障之间的关系。MTBI受试者和匹配的对照受试者进行了注意力网络测试（ANT），旨在隔离注意力的几个不同组成部分。在步态过程中的障碍物跨越与不同时注意力分散的任务也进行了。ANT和障碍物清除测量的反应时间是主要的因变量。我们观察到，脑震荡的个人有更多的障碍物接触比对照组。在脑震荡后，在空间中定向注意力的能力在统计学上也是不足的，这与领先的脚的障碍物清除率较低有关。当注意力在障碍物穿越过程中被分散时，脑震荡参与者的注意力的空间方向与前足和后足回避之间也存在类似的相关性，随着恢复的进展，这些关系逐渐减弱。相比之下，空间注意力和障碍清除在控制组中没有显着相关性。这些研究结果表明，与空间注意力缺陷较少或没有空间注意力缺陷的患者相比，表现出更大空间注意力缺陷的mTBI患者以更低的清除率越过障碍物，导致障碍物接触的概率增加。
Re-injury to the brain during recovery from an initial concussion leads to increased probability of permanent brain damage or death. Recovery from concussion has been proposed to be ongoing even up to a month post-injury. The goal of the current study was to investigate the relationship between the visuospatial orientation of attention and obstacle avoidance during gait in individuals that have recently suffered a concussion (mTBI) over a month post-injury. MTBI subjects and matched control subjects performed the attentional network test (ANT), designed to isolate several different components of attention. Obstacle crossing during gait with and without a concurrent attention dividing task was also performed. Reaction times from the ANT and obstacle clearance measurements were the main dependent variables. We observed that concussed individuals had statistically more obstacle contacts than controls. The ability to orient attention in space was also statistically deficient immediately after a concussion, and this was correlated with lower obstacle clearances of the leading foot. Similar correlations could also be found between both leading and trailing foot avoidance and spatial orientation of attention in participants with concussion when attention was divided during obstacle crossing, and these relationships gradually weakened as recovery progressed. By contrast, spatial attention and obstacle clearance were not significantly correlated in control subjects. These findings indicate that patients with mTBI who display greater spatial attention deficits cross over the obstacle with a lower clearance than patients with less or without spatial attention deficits, leading to an increased probability of obstacle contact.