Fukui Takao, Inui Toshio
Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan,
Exp Brain Res. 2015 Aug;233(8):2257-68. doi: 10.1007/s00221-015-4295-8. Epub 2015 May 1.
Our previous study (Hum Mov Sci 25:349-371, 2006) investigated whether and how online vision in the early phase of movement influences the control of reach-to-grasp movements (movement duration: approximately 1000 ms). We used liquid-crystal shutter goggles to manipulate the duration of available online vision during the movement and specified that online vision during the early phase influences grasping movements. The current study examined the effect of online early phase vision on the grip configuration according to the movement duration and compared it between two different movement durations (approximately 500 and 1000 ms). We found that non-availability of early phase online vision affected the grip configuration (i.e., inducing a larger peak grip aperture) even in the shorter movement duration. The influential period for online vision for grasping control shifts to an earlier time when movement time is shorter (i.e., from approximately 214 to 106 ms after movement onset), indicating a flexible mechanism for grip configuration according to the movement duration and the available online vision.
我们之前的研究（《人类运动科学》25:349 - 371, 2006）调查了运动早期的在线视觉是否以及如何影响伸手抓握动作的控制（动作持续时间：约1000毫秒）。我们使用液晶快门眼镜来控制运动过程中可用在线视觉的持续时间，并明确指出早期阶段的在线视觉会影响抓握动作。本研究根据动作持续时间，考察了早期阶段在线视觉对握力配置的影响，并在两种不同的动作持续时间（约500毫秒和1000毫秒）之间进行了比较。我们发现，即使在较短的动作持续时间内，早期阶段在线视觉的缺失也会影响握力配置（即导致更大的峰值握力孔径）。抓握控制的在线视觉影响期在动作时间较短时会提前（即从动作开始后约214毫秒提前到106毫秒），这表明存在一种根据动作持续时间和可用在线视觉来灵活配置握力的机制。
