Effect of biomechanical constraints in the hand laterality judgment task: where does it come from?
Effect of biomechanical constraints in the hand laterality judgment task: where does it come from?
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DOI：
10.3389/fnhum.2012.00299
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发表时间：
2012
影响因子：
2.9
通讯作者：
Andres M
中科院分区：
文献类型：
--
作者：
Vannuscorps G;Pillon A;Andres M
一些研究报告说，当受试者必须判断旋转手绘的偏侧性时，他们的判断会自动受到上肢生物力学约束的影响。这种效应的主要原因是，为了执行任务，受试者在心理上将上肢旋转到显示刺激的位置，其方式与实际运动背后的生物力学约束一致。然而，这样的生物力学约束的效果也被发现在运动受损的个人执行的手偏侧判断（HLJ）任务，这似乎与“运动想象”的帐户这种效果的反应。在这项研究中，我们进一步探讨了生物力学约束效应的来源，通过评估一个人（DC）与先天性缺乏上肢判断偏侧旋转的手或脚图纸的能力。我们发现，DC是准确和快速的控制参与者在判断手和脚的图纸偏侧，没有任何不利的手相比，脚。此外，DC的反应延迟（RL）的手动作的生物力学约束的影响，以同样的方式控制参与者的RL。这些结果表明，在HLJ任务中的生物力学约束的效果并不严格依赖于“运动想象”，可以产生从身体部位的视觉处理敏感，这样的限制。
Several studies have reported that, when subjects have to judge the laterality of rotated hand drawings, their judgment is automatically influenced by the biomechanical constraints of the upper limbs. The prominent account for this effect is that, in order to perform the task, subjects mentally rotate their upper limbs toward the position of the displayed stimulus in a way that is consistent with the biomechanical constraints underlying the actual movement. However, the effect of such biomechanical constraints was also found in the responses of motor-impaired individuals performing the hand laterality judgment (HLJ) task, which seems at odds with the “motor imagery” account for this effect. In this study, we further explored the source of the biomechanical constraint effect by assessing the ability of an individual (DC) with a congenital absence of upper limbs to judge the laterality of rotated hand or foot drawings. We found that DC was as accurate and fast as control participants in judging the laterality of both hand and foot drawings, without any disadvantage for hands when compared to feet. Furthermore, DC's response latencies (RLs) for hand drawings were influenced by the biomechanical constraints of hand movements in the same way as control participants' RLs. These results suggest that the effect of biomechanical constraints in the HLJ task is not strictly dependent on “motor imagery” and can arise from the visual processing of body parts being sensitive to such constraints.
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