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

人类背腹视觉系统信息整合机制

基本信息

批准号：
11309007
负责人：
INUI Toshio
金额：
$ 23.61万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11309007/
关键词：
dorsal pathway ventral pathway information integration shape information spatial information visual working memory visual motion category 運動視差

项目摘要

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

Inui和Konishis的报告：我们在使用筷子，观察，成像使用并通过Pantomime进行使用时测量了大脑的活性。结果，我们发现假定操作动作的内存表示的下壁叶与这些性能有关。在执行这些操作期间，它也出现了，正确的PMV与运动的精确调整有关。另一方面，我们研究了各种视觉信息，这些信息在抓住运动的运动控制中起着重要作用。结果，我们发现运动开始后的150ms至350ms之间的视觉信息非常重要，特别是对于运动持续时间固定在1,100ms左右的电机控制中。我们的结果强调了记录最大速度的时间的相关性，大约是运动开始后的350毫秒。我们的结果表明，在Sue时，不能保留三到四种颜色和形状的组合。据透露，在给定时间，三到四个对象表示通过背侧和腹侧通路进行处理和整合，在给定时间不会保留在大脑中。相反，我们发现我们只能保留有限数量的对象表示，通过选择性关注来反复，动态地通过特征集成过程来构造和解构它们。Sugio的报告：我们研究了与事件相关的FMRI FIFMRI研究的每天对物体在手工塑造握把上的局部特征的效果和熟悉的效果。我们的结果表明，用手柄零件抓住对象的手形取决于语义知识和局部掌握特征激活的电机方案。Hayashi的报告：我们测量了目标对象在到达和移动过程中意外变化的目标对象的位置时，我们测量了Saccadic眼球运动的潜伏期。六个受试者的平均潜伏期为258±35ms，实际上和抓握为323±40ms，仅固定。这意味着由于执行和抓握的执行，潜伏期变得短缺。提出，视觉注意力的重点将与SACCADIC潜伏期呈正相关，这可以预测，在到达和掌握控制的早期时期，注意力可能很容易脱离。较少的