The role of sub-maximal force production in the enslaving phenomenon
The role of sub-maximal force production in the enslaving phenomenon
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DOI：
10.1016/s0006-8993(02)03288-2
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发表时间：
2002-11-08
期刊：
影响因子：
2.9
通讯作者：
Ray, W
中科院分区：
文献类型：
--
作者：
Slobounov, S;Johnston, J;Ray, W
当个体执行只涉及一个手指的力任务时，他们也会不由自主地移动其他手指。这种现象被称为奴役力或手指的相互依赖性。鉴于以往文献的奴役力集中在最大等距生产力，本研究旨在研究次最大生产力的奴役现象中的作用。为此，我们研究了行为的三个层次的生产力与恒定速率的力量发展。我们还研究了奴役的时间组织分离的实现所需的力量（斜坡阶段）和它的维护（静态阶段）。在静态阶段，我们发现：（1）无论是食指、中指、无名指还是小指作为主指，奴役量都随着标称力水平的增加而增加：（2）与主指直接相邻的手指奴役作用最强;（iii）在奴役方面，食指比其他三个手指更“独立”，无论产生的名义力如何，其次是小指，中指和无名指在时间组织方面，我们发现，在斜坡阶段激活的时间滞后，从手指的量的力水平的增加而减少。总的来说，我们的数据表明，奴役效应是一个特定的任务的现象，并取决于由主手指产生的力的大小。(C)2002 Elsevier Science B. V.保留所有权利。
When individuals perform a force task involving only one finger, they involuntarily move other fingers as well. This phenomenon is referred to as the enslaving force or the interdependency of fingers. Given that previous literature on the enslaving force has focused on maximal isometric force production, the present research was designed to study the role of sub-maximal force production in the enslaving phenomenon. To this end, we examined behaviorally three levels of force production with a constant rate of force development. We also examined the temporal organization of enslaving separating the achievement of the desired force (ramp phase) and its maintenance (static phase). During the static phase we found: (i) the amount of enslaving increased with the increment of nominal force level whether the index, middle, ring or little fingers were used as the master finger; (ii) enslaving is strongest in the finger directly adjacent to the master finger; and (iii) in terms of enslaving, the index finger was more 'independent' than the other three fingers, regardless of nominal force produced, followed by the little, middle, and ring fingers. In terms of temporal organization, we found that the time-lag of activation of,slave fingers' during the ramp phase was reduced as the amount of force level increased. Overall, our data suggest that enslaving effect is a task specific phenomenon and depends on the amount of force produced by the master finger. (C) 2002 Elsevier Science B.V. All rights reserved.