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

Inui和Konishis的报告：我们测量了使用筷子时大脑的活动，观察、想象筷子的使用，并通过手势表演筷子的使用。结果，我们发现下顶叶，被认为是操作动作的记忆表征，与这些表现有关。在执行这些动作的过程中，右PMv也与运动的精确调整有关。另一方面，我们研究了在抓握运动控制中起重要作用的视觉信息的种类。因此，我们发现运动开始后150ms至350ms之间的视觉信息对运动控制非常重要，特别是在运动持续时间固定在1100 ms左右的运动控制中。我们的结果强调了记录最大速度的时间的相关性，大约在运动开始后350ms。Saiki的报告：我们进行了MOPT任务的实验，使用的对象被定义为颜色、…More和形状。我们的结果表明，三到四种颜色和形状的组合不能同时保留。研究表明，在给定的时间内，三到四个物体表征（每一个都是通过背侧和腹侧通路处理和整合的）并没有保留在大脑中。相反，我们发现我们只能保留有限数量的对象表征，通过选择性注意的特征整合过程反复动态地构建和解构它们。Sugio的报告：我们通过事件相关的fMRI研究，研究了局部特征和日常物品熟悉程度对手部形状控制的影响。结果表明，手的形状取决于由语义知识和局部可抓性特征激活的运动方案。Hayashi的报告：我们测量了当目标物体的位置在到达和抓取运动中发生意外变化时，眼球跳动的潜伏期。6名被试实际伸手和抓握的平均潜伏期为258±35ms，单纯注视的平均潜伏期为323±40ms。这意味着由于执行伸手和抓握，延迟变得很短。提示视觉注意力的集中程度与跳眼潜伏期呈正相关，这预示着在伸手和抓握控制的早期，注意力很容易脱离。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