Armatas C A, Summers J J, Bradshaw J L
Department of Psychology, University of Melbourne, Parkville, Victoria, Australia.
J Clin Exp Neuropsychol. 1994 Jun;16(3):405-13. doi: 10.1080/01688639408402651.
Intensity of mirror movements occurring under specific task conditions in normal adults was investigated using a finger flexion task. Subjects were asked to sustain target pressures using different fingers. Greater pressures of mirror movement were recorded when the weaker, small finger of either hand performed the task. The target pressure which subjects were asked to sustain did not influence the amount of mirror movement exhibited by either males or females, even though higher target forces required a significantly greater percentage of total finger strength. On average, males exhibited the same quantity of mirror movements as female subjects, despite the force requirements of the task representing for them a significantly smaller percentage of total finger strength. Moreover, when the right hand performed the experimental tasks, less mirror movement was exhibited than when the left hand was active. Thus, the left hand showed stronger mirror movements. The findings were consistent with previous research using children as subjects, although the nonsignificant effects of gender and pressure were unexpected and need to be examined further. It appears that, while the force requirement of the task does influence the magnitude of mirror movement, it is not the principle determinant.
使用手指弯曲任务，对正常成年人在特定任务条件下出现的镜像运动强度进行了研究。受试者被要求用不同的手指维持目标压力。当双手较弱的小指执行任务时，记录到的镜像运动压力更大。受试者被要求维持的目标压力并未影响男性或女性表现出的镜像运动量，尽管更高的目标力需要手指总力量的显著更大比例。平均而言，尽管任务的力量要求占男性手指总力量的比例明显较小，但男性表现出的镜像运动量与女性受试者相同。此外，当右手执行实验任务时，表现出的镜像运动比左手活动时少。因此，左手表现出更强的镜像运动。这些发现与之前以儿童为受试者的研究一致，尽管性别和压力的不显著影响出乎意料，需要进一步研究。看来，虽然任务的力量要求确实会影响镜像运动的幅度，但它不是主要决定因素。
