Hand preference for precision grasping predicts language lateralization
Hand preference for precision grasping predicts language lateralization
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DOI：
10.1016/j.neuropsychologia.2009.07.019
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发表时间：
2009-12-01
期刊：
影响因子：
2.6
通讯作者：
Goodale, Melvyn A.
中科院分区：
文献类型：
--
作者：
Gonzalez, Claudia L. R.;Goodale, Melvyn A.
我们调查了抓握的手偏好与语言的半球优势之间是否存在关系，以及它们与其他传统的惯用手测量方法之间的关系。为此，我们要求惯用右手和左手的参与者将两套不同的 3D 拼图拼凑在一起，这些拼图由大或非常小的乐高 (c) 部件制成。参与者还获得了两份自我报告的惯用手调查问卷，以及握力和手指敲击速度的测试。还进行了语言偏侧化（双耳听力）测试。我们发现精确抓握的手部使用与语言偏侧化之间存在正相关（即，参与者使用右手抓握小乐高 (c) 部件的次数越多，语言偏向左半球的程度就越多）。此外，我们根据左撇子的抓握表现，识别出两个群体：“左撇子”，他们的行为与右撇子完全一样；“左撇子”，他们的行为与右撇子完全一样。以及“左撇子”，其表现是右撇子的镜像。最后，我们发现，当右手使用者和“左右手使用者”必须拿起小乐高 (c) 部件时，右手使用的情况有所增加。我们讨论了与视觉引导行动的左半球专门化的最新概念及其与语言进化的关系有关的结果。 (c) 2009 Elsevier Ltd. 保留所有权利。
We investigated whether or not there is a relationship between hand preference for grasping and hemispheric dominance for language-and how each of these is related to other traditional measures of handedness. To do this we asked right- and left-handed participants to put together two different sets of 3D puzzles made out of big or very small LEGO (c) pieces. Participants were also given two self-reported handedness questionnaires, as well as tests of grip force and finger tapping speed. A language lateralization (dichotic listening) test was also administered. We found a positive correlation between hand use for precision grasping and language lateralization (i.e. the more participants used their right hand for grasping the small LEGO (c) pieces, the more language was lateralized to the left hemisphere). In addition, we identified two populations of left-handers according to their grasping performance: 'left-right-handers', who behaved exactly like right-handers; and 'left-left-handers' whose performance was the mirror image of that of right-handers. Finally, we found an increase in right-hand use when right-handers and 'left-right-handers' had to pick up the small LEGO (c) pieces. We discuss our results in relation to recent notions of left-hemisphere specialization for visually guided actions and its relationship with the evolution of language. (c) 2009 Elsevier Ltd. All rights reserved.