手动不对称与利手。
Manual asymmetry and handedness.
作者信息
Purves D, White L E, Andrews T J
机构信息
Duke University Medical Center, Department of Neurobiology, Durham, NC 27710.
出版信息
Proc Natl Acad Sci U S A. 1994 May 24;91(11):5030-2. doi: 10.1073/pnas.91.11.5030.
Volumetric measurements show that right-handed individuals have larger right hands than left hands. In contrast, the hands of left-handers are much more nearly symmetrical. Based on what is known about trophic interactions between neurons and targets, these findings predict a corresponding asymmetry of the relevant parts of the sensorimotor system in right-handers. The lack of an opposite-hand asymmetry among left-handers further implies that right- and left-handed phenotypes do not arise according to the same developmental rules.
体积测量表明，惯用右手的人右手比左手大。相比之下，惯用左手的人的双手则更为接近对称。基于对神经元与靶标之间营养相互作用的已知情况，这些发现预示着惯用右手的人在感觉运动系统的相关部位存在相应的不对称性。惯用左手的人不存在相反手的不对称性，这进一步表明，惯用右手和左手的表型并非按照相同的发育规则产生。
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