Taylor H G, Heilman K M
Cortex. 1980 Dec;16(4):587-603. doi: 10.1016/s0010-9452(80)80006-2.
Left-hemisphere dominance for motor programming was tested in two experiments by measuring acquisition and cross-hand transfer of a complex key-pressing skill in righthanded adults. In the first experiment, visual feedback was excluded to insure unilaterality of motor control. Consistent with left-hemisphere motor dominance, males showed faster acquisition with righthand training than with lefthand training and greater transfer from left to right then vice versa; but females exhibited neither asymmetry. To investigate the possibility that females relied on verbal strategies to remember which keys to press and that this prevented them from showing the predicted asymmetries, the need for such strategies was reduced in a second experiment by allowing visual feedback. Although the provision of visual input may have mitigated against motor asymmetries by directly engaging both hemispheres in the task, results showed more rapid improvement in skills with the right hand than with the left for both sexes, extending evidence for left-hemisphere motor dominance to a population including females as well as males.
在两项实验中，通过测量右利手成年人复杂按键技能的习得情况和交叉手迁移情况，对运动编程的左半球优势进行了测试。在第一个实验中，排除了视觉反馈以确保运动控制的单侧性。与左半球运动优势一致，男性右手训练比左手训练习得速度更快，从左到右的迁移比从右到左更大；但女性没有表现出不对称性。为了研究女性是否依赖言语策略来记住按哪些键，以及这是否阻止了她们表现出预期的不对称性，在第二个实验中通过允许视觉反馈来减少对这种策略的需求。尽管提供视觉输入可能通过使两个半球直接参与任务而减轻了运动不对称性，但结果显示，两性用右手的技能提高都比用左手更快，这将左半球运动优势的证据扩展到了包括女性和男性在内的人群。
