Jones D L, Bradshaw J L, Phillips J G, Iansek R, Mattingley J B, Bradshaw J A
Monash University, Melbourne, Australia.
J Clin Exp Neuropsychol. 1994 Feb;16(1):117-28. doi: 10.1080/01688639408402622.
The allocation of attention to the programming and execution of movement sequences was examined in Parkinson's disease (PD). The time taken to initiate and execute sequences of one, three, and five button taps was examined, while also varying the hand used (left or right) and the attentional resources that could be allocated to sequencing (using single- versus dual-task conditions). These results showed that performance anomalies in PD were most apparent with the preferred right hand under single-rather than dual-task conditions. Subjects suffering from PD may tend to divert attention from the right hand under single-task conditions, and perhaps with short sequences, as well as being less likely to prepare sequences of more than three movements in advance with that hand. These effects were unlikely to reflect asymmetric pathology. If the right hand of such subjects has in some respects now come to behave more like a "clumsy" left hand, this may reflect a deliberate strategic choice in an attempt to cope with a movement impairment.
我们研究了帕金森病（PD）患者在运动序列编程和执行过程中注意力的分配情况。我们考察了启动和执行一、三、五个按钮点击序列所需的时间，同时还改变了使用的手（左手或右手）以及可分配给序列的注意力资源（使用单任务与双任务条件）。这些结果表明，在单任务而非双任务条件下，PD患者的表现异常在惯用右手时最为明显。患有PD的受试者在单任务条件下可能倾向于将注意力从右手上转移，也许在短序列情况下也是如此，并且不太可能用那只手提前准备超过三个动作的序列。这些影响不太可能反映不对称的病理情况。如果这些受试者的右手在某些方面现在表现得更像一只“笨拙”的左手，这可能反映了一种为应对运动障碍而做出的刻意策略选择。
