Handedness-related asymmetry in coupling strength in bimanual coordination: Furthering theory and evidence
Handedness-related asymmetry in coupling strength in bimanual coordination: Furthering theory and evidence
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DOI：
10.1016/j.actpsy.2006.03.003
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发表时间：
2007-02-01
影响因子：
1.8
通讯作者：
Beek, Peter J.
中科院分区：
文献类型：
--
作者：
de Poel, Harjo J.;Peper, C. Lieke E.;Beek, Peter J.
偏手性对双手同频协调的影响（例如，优势肢的相位提前）被认为是由于肢间耦合强度的不对称，非优势肢受优势肢的影响比反之更强烈。这一假设的正式版本是通过检查对双手协调模式的机械扰动和频率引起的相位转变的反应，对右手和左手参与者的四肢进行相位调整来验证的。在这两种情况下，阶段适应主要是由右撇子的非优势肢体进行的，而这种影响在左撇子中没有达到显著性。因此，在后一组中，耦合强度的不对称性不太明显。此外，不对称的程度取决于运动频率。观察到的不对称性与相关的神经生理学结果有关。(c) 2006 Elsevier B.V.版权所有
The effects of handedness on bimanual isofrequency coordination (e.g., phase advance of the dominant limb) have been suggested to result from an asymmetry in interlimb coupling strength, with the non-dominant limb being more strongly influenced by the dominant limb than vice versa. A formalized version of this hypothesis was tested by examining the phase adjustments in both limbs in response to mechanical perturbation of the bimanual coordination pattern and during frequency-induced phase transitions, for both right- and left-handed participants. In both situations, the phase adaptations were made predominantly by the non-dominant limb in right-handers, whereas this effect failed to reach significance in left-handers. Thus, the asymmetry in coupling strength was less pronounced in the latter group. In addition, the degree of asymmetry depended on movement frequency. The observed asymmetry was discussed in relation to pertinent neurophysiological findings. (c) 2006 Elsevier B.V. All rights reserved.