INFLUENCE OF CONCURRENT TASKS ON GAIT - A DUAL-TASK APPROACH
INFLUENCE OF CONCURRENT TASKS ON GAIT - A DUAL-TASK APPROACH
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DOI：
10.2466/pms.1995.81.1.107
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发表时间：
1995-08-01
影响因子：
1.6
通讯作者：
POEWE, W
中科院分区：
文献类型：
--
作者：
EBERSBACH, G;DIMITRIJEVIC, MR;POEWE, W
采用双任务方法研究了并发任务对步态运动控制的影响。10名健康受试者被指示执行不同的认知和运动任务，在步行导电走道。记录脚踏开关信号，计算跨步时间和双支撑时间。有人认为，前者反映了步态模式的机制，后者涉及平衡控制。统计分析表明，增加双支持时间时，记忆保持任务（数字跨度）和精细运动任务（扣）在步态同时执行。与基线条件相比，步态期间认知任务的性能下降。并发的认知和运动任务的注意力需求似乎迫使受试者调整他们的步态策略，以确保控制的平衡。步幅时间是一致的任务条件下，除了当受试者进行快速手指敲击步态。除一名受试者外，所有受试者的步幅时间都减少了，步幅频率增加了，这在重新测试时是可重复的。由于不同的节奏运动可能共享共同的神经生物学网络，我们假设步幅频率的调制是由于结构干扰。
We studied the effect of concurrent tasks on motor control of gait with dual-task methodology. Ten healthy subjects were instructed to perform different cognitive and motor tasks during gait on a conductive walkway. Footswitch signals were recorded and stride lime and double-support time were calculated. It was assumed that the former reflects gait-patterning mechanisms and the latter relates to balance control. Statistical analysis showed an increase in double-support time when a memory-retention task (digit-span) and a fine motor task (buttoning) were executed simultaneously during gait. During gait performance of the cognitive task declined compared to baseline conditions. Attentional demand of concurrent cognitive and motor tasks appeared to force subjects to modulate their gait strategy to ensure control of balance. Stride time was consistent across task conditions except when subjects performed fast finger-tapping during gait. Then all but one subject showed a decrease in stride time and an increase in stride-frequency that was repeatable on retest. Since different rhythmic movements are likely to share common neurobiological networks, we assumed that the modulation of stride-frequency was due to structural interference.