Salters Danielle, Rios P Camila, Ramsay Eliza, Scharoun Benson Sara M
Department of Kinesiology, University of Windsor, Windsor, Ontario, Canada.
J Mot Behav. 2021;53(6):737-749. doi: 10.1080/00222895.2020.1858746. Epub 2020 Dec 17.
Various factors (e.g., hand preference, object properties) constrain reach-to-grasp in hemispace. With object use, end-state comfort (ESC) has been shown to supersede the preferential use of one hand at the midline. To assess how location, size, and orientation of objects (dowel, mallet, cup) influence preferred-hand use and ESC (N = 50; M = 20.83), three preferential reaching tasks were implemented. Object location influenced hand selection in all tasks, along with size (cups) and orientation (mallets). Object location and orientation influenced ESC, but only with dowels and mallets. When oriented away from the preferred hand in hemispace, there was a higher occurrence of non-preferred hand use to facilitate ESC. Overall, findings add to understanding of ESC and preferential reaching with varying task demands.
多种因素（如利手、物体属性）会限制在半侧空间中的抓握动作。在物体使用过程中，已表明终末状态舒适度（ESC）会取代在中线处优先使用某一只手的情况。为了评估物体（木钉、木槌、杯子）的位置、大小和方向如何影响优势手的使用和终末状态舒适度（N = 50；M = 20.83），实施了三项优先伸手任务。物体位置在所有任务中都会影响手的选择，大小（杯子）和方向（木槌）也会产生影响。物体位置和方向会影响终末状态舒适度，但仅在木钉和木槌的情况下如此。当在半侧空间中物体方向远离优势手时，为便于达到终末状态舒适度，使用非优势手的情况会更频繁。总体而言，研究结果有助于加深对终末状态舒适度以及在不同任务需求下优先伸手动作的理解。
