Mechanisms of information integration between dorsal and ventral visual systems in human

Inui和Konishim的报告：我们测量了使用筷子时大脑的活动，观察、成像，并通过哑剧表演使用筷子。结果，我们发现被认为操作动作记忆表征的顶叶下部与这些操作有关。它也出现在执行这些动作的过程中，正确的PMV与运动的精确调整有关。另一方面，我们考察了在抓握运动的运动控制中起重要作用的视觉信息的种类。结果，我们发现运动开始后150ms到350ms之间的视觉信息是重要的，特别是对于运动持续时间固定在1100ms左右的运动控制。我们的结果强调了记录最大速度的时间的相关性，大约在移动开始后350毫秒。Saiki的报告：我们使用…定义的对象进行了移动操作任务的实验更多的形状。我们的结果表明，三到四种颜色和形状的组合不能在Sue时间内保留。研究表明，在给定的时间内，大脑中没有保留三到四个物体表征，每个表征都是通过背侧和腹侧通路进行处理和整合的。相反，我们发现我们只能保留有限数量的物体表征，通过选择性注意通过特征整合过程反复动态地构建和解构它们。Sugio的报告：我们通过事件相关fMRI研究考察了局部特征和日常物体的熟悉度对抓取的手形控制的影响。我们的结果表明，握持有手柄部分的物体的手形取决于由语义知识和局部可抓取特征激活的运动方案。Hayashi的报告：我们测量了目标物体在伸手和抓取运动过程中位置发生意外变化时眼跳运动的潜伏期。6名受试者实际触握潜伏期为258±35ms，单纯注视潜伏期为323±40ms。这意味着由于伸手和抓取的执行，潜伏期变得很短。提示视觉注意的集中程度与眼跳潜伏期呈正相关，这预示着注意在到达和掌握控制的早期阶段可能容易脱离。较少

Inui and Konishis' report: We measured the activity of the brain during using chopsticks, observing, imaging the use of them, and performing the use of them by pantomime. As a result, we found that inferior parietal lobe, which is assumed to operate the memory representation of actions, is related to these performances. It also appeared during executing these actions, right PMv is related to the precise adjustment of the movement. On the other hand, we examined the kinds of visual information which plays an important role in the motor control of grasping movement. As a result, we found that visual information between 150ms and 350ms after the movement onset is important especially for the motor control in which the movement duration is fixed at around 1,100ms. Our results emphasized the relevance of the time to record the maximum speed, approximately 350ms after the start of movement.Saiki's report: We conducted the experiments of MOPT tasks using objects that are defined with colors a … More nd shapes. Our results show that three to four combinations of colors and shapes cannot be retained at the sue time. It was revealed that three to four object representations, each of which is processed and integrated through the dorsal and ventral pathways, are not retained in the brain at a given time. Rather, we found that we can retain only the limited numbers of object representations, repeatedly and dynamically constructing and deconstructing them through the feature integration process by the selective attention.Sugio's report: We investigated the effects of local features and familiarity of everyday objects on hand shaping control of grasping by the event-related fMRI studies. Our results indicated that hand shapes of grasping the object with handle parts depended on the motor scheme activated by both semantic knowledge and local graspable features.Hayashi's report: We measured the latency of the saccadic eye movement when the position of the target object unexpectedly changed during reaching and grasping movement. The average latency over six subjects were 258±35ms in actually reaching and grasping, and 323±40ms in only fixating. This meant that the latency became short due to the execution of reaching and grasping. Suggested that the degree of the focus of visual attention would be positively correlated with the saccadic latency, this could predict that attention may be easily disengaged in early period of reaching and grasping control. Less