Handedness and Reach-to-Place Kinematics in Adults: Left-Handers Are Not Reversed Right-Handers
Handedness and Reach-to-Place Kinematics in Adults: Left-Handers Are Not Reversed Right-Handers
复制标题
DOI：
10.1080/00222895.2017.1363698
复制
发表时间：
2018-01-01
影响因子：
1.4
通讯作者：
Konidaris, George D.
中科院分区：
文献类型：
--
作者：
Nelson, Eliza L.;Berthier, Neil E.;Konidaris, George D.
本研究的主要目的是探讨成年人的肢体控制和利手之间的关系。参与者被分为左撇子或右撇子，使用爱丁堡惯用手量表进行分析。每个手臂的三维记录都是在两个到达位置的任务中完成的：成年人伸手去拿一个球并将其放入玩具的开口中（拟合任务），或者伸手去拿一个杯子里的Cheerio，他们在每次试验后将其放在指定的标记上（杯子任务）。我们假设，肢体控制和利手是相关的，我们预测，我们会观察到有利于优势肢体的运动侧化的动态优势假说的基础上的侧差异。具体来说，我们预测，与非优势肢体相比，优势肢体在两项任务中都会更直更平滑（即，右撇子的右臂和左撇子的左臂）。我们的研究结果只部分支持这些预测的右撇子，但不是左撇子。当观察手之间的差异时，右手是有利的，而不管利手组。我们的研究结果表明，左撇子是不是相反的右撇子时，肢体间运动学达到到位的任务相比，并重申，任务选择是至关重要的，当评估手动不对称。
The primary goal of this study was to examine the relations between limb control and handedness in adults. Participants were categorized as left or right handed for analyses using the Edinburgh Handedness Inventory. Three-dimensional recordings were made of each arm on two reach-to-place tasks: adults reached to a ball and placed it into the opening of a toy (fitting task), or reached to a Cheerio inside a cup, which they placed on a designated mark after each trial (cup task). We hypothesized that limb control and handedness were related, and we predicted that we would observe side differences favoring the dominant limb based on the dynamic dominance hypothesis of motor lateralization. Specifically, we predicted that the dominant limb would be straighter and smoother on both tasks compared with the nondominant limb (i.e., right arm in right-handers and left arm in left-handers). Our results only partially supported these predictions for right-handers, but not for left-handers. When differences between hands were observed, the right hand was favored regardless of handedness group. Our findings suggest that left-handers are not reversed right-handers when compared on interlimb kinematics for reach-to-place tasks, and reaffirm that task selection is critical when evaluating manual asymmetries.