Verfaellie M, Heilman K M
Memory Disorders Research Center, Boston Veterans Administration Medical Center, Massachusetts 02130.
Brain Cogn. 1990 Sep;14(1):70-80. doi: 10.1016/0278-2626(90)90061-r.
Liepmann (1908) proposed that handedness reflects the greater capacity of one hemisphere to learn the execution of skilled movements. Although asymmetries in motor control are an important basis for hand asymmetries, recent studies have suggested that handedness may be determined by multiple factors. In the present study, we examine how attentional asymmetries may contribute to hand preferences. Right-handed subjects participated in a reaction time task in which they were given preliminary information about where a target stimulus would occur (selective attention) or which hand to use for responding (selective intention). Our findings indicate that these processes influence each other reciprocally and favor a state of optimal attentional and intentional preparation of the right hand. We suggest that these hemispheric asymmetries in attentional control contribute to hand preferences in certain sensorimotor tasks.
利希曼（1908年）提出，用手习惯反映了一个半球在学习执行熟练动作方面更强的能力。虽然运动控制方面的不对称是用手不对称的一个重要基础，但最近的研究表明，用手习惯可能由多种因素决定。在本研究中，我们考察了注意力不对称可能如何导致用手偏好。右利手受试者参与了一项反应时任务，在该任务中，他们会得到关于目标刺激将出现在何处的初步信息（选择性注意）或用于反应的手（选择性意图）。我们的研究结果表明，这些过程相互影响，并有利于右手处于最佳注意力和意图准备状态。我们认为，注意力控制方面的这些半球不对称在某些感觉运动任务中导致了用手偏好。
