Related Experiment Video
Updated: May 7, 2026
Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
Published on: January 15, 2018
Utilization of visual feedback of the hand according to target view availability in the online control of prehension
1Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
Abstract:
The aim of this study was to investigate the role of online vision of a target object and the participant's moving hand in the early phase of reach-to-grasp movements. We designed an experiment that separately manipulated the visibility of a moving hand and the target object by using two liquid crystal shutter plates placed in the same horizontal plane (25 cm above the experimental table). When target view was available immediately after movement onset, the effect of hand view in the early phase of movement was very limited. The effect of hand view appeared when target view in the early phase of movement was not available. This was even the case for the condition where the temporal range of non-availability of target view after movement initiation was 150 ms. Therefore, online vision (of target and hand) for controlling grasping was utilized in a flexible fashion that depended on the visual environment.
