数学归纳推理和双手运动协作的fMRI研究

发布时间：2018-02-27 07:48

本文关键词： 功能磁共振成像数学归纳推理交替运动协作同步运动协作　出处：《电子科技大学》2011年硕士论文　论文类型：学位论文

【摘要】：认知的研究在很长的一段时间内都是基于纯粹心理学的,随着实验方法的进步和影像技术的发展,我们已经能获得关于大脑结构与功能的重要信息,从而对认知现象错综复杂的神经生理机制有了更深的了解。本文就利用功能磁共振成像(functional Magnetic Resonance Image, fMRI)在数学归纳推理和双手运动协作任务中的应用,来探讨各自脑认知功能的潜在神经机制。数学归纳推理是重要的逻辑认知过程,为了探究其神经基础及实验任务难度与认知强度间的关系,我们设计了包含简单数学归纳推理、复杂数学归纳推理的任务组实验和数学计算的对照组实验,并对被试进行了fMRI数据的采集。成像结果表明简单数学归纳推理主要激活左侧角回,复杂数学归纳推理主要激活左侧额叶上回和双侧的角回。此外简单推理中左侧角回的激活强度与任务的难度系数有正相关性,复杂推理中左侧额上回的激活强度与任务的难度系数有正相关性。这些结果表明角回和额叶上回在不同难度的数学归纳推理任务中有着重要的作用:简单推理中的任务难度主要调节左侧角回所主管的认知成分,复杂推理中的任务难度主要调节额上回所主管的认知成分。在双手运动协作研究中,我们设计了包含交替运动协作和同步运动协作两个条件的手指敲击实验,并对被试进行了fMRI数据的采集。从脑功能激活和脑网络两个方面比较了两种运动协作任务的神经机制的异同,并分析了其产生的原因。根据结果我们有以下结论:两种任务的认知控制都需要额叶的计划和颞叶的节律性调节及运动区的执行来完成,但两种任务具有不同的认知控制机制。同步运动协作任务较交替协作任务需要更多的内在的运动感觉、描述和提取,更多更强的双手间信息交互,更多的实时的节律调节。也就是说,交替运动协作较同步运动协作简单且只需要计划好后执行,而同步运动协作在计划好后执行时,还需要更多的实时的调整。
[Abstract]:Cognitive research has been based on pure psychology for a long time, and with the development of experimental methods and imaging technology, we have been able to obtain important information about the structure and function of the brain. In this paper, the application of functional Magnetic Resonance image (fMRI) in inductive reasoning and in the task of working together in both hands and motion is presented. To explore the underlying neural mechanisms of cognitive function in their respective brains. Mathematical inductive reasoning is an important process of logical cognition. In order to explore the relationship between the neural basis and the difficulty of experimental tasks and the cognitive intensity, we have designed a simple mathematical inductive reasoning. The task group experiment of complex mathematical inductive reasoning and the control group experiment of mathematical calculation were carried out, and the fMRI data were collected. The imaging results showed that simple mathematical inductive reasoning mainly activated the left corner gyrus. Complex mathematical inductive reasoning mainly activates the left superior frontal gyrus and bilateral angular gyrus. In simple reasoning, there is a positive correlation between the activation intensity of the left corner gyrus and the task difficulty coefficient. The activation intensity of the left superior frontal gyrus is positively correlated with the task difficulty coefficient in complex reasoning. These results indicate that the angular gyrus and the superior frontal gyrus play an important role in the different difficulty of mathematical inductive reasoning: in simple reasoning. The task difficulty mainly regulates the cognitive components of the left corner gyrus supervisor, The task difficulty in complex reasoning mainly regulates the cognitive component of the superior frontal gyrus supervisor. In the research of two-hand motion cooperation, we designed the finger tapping experiment, which includes two conditions: alternating motion cooperation and synchronous motion cooperation. The fMRI data were collected, and the neural mechanisms of the two kinds of motor cooperative tasks were compared from the aspects of brain function activation and brain network. Based on the results, we have concluded that the cognitive control of the two tasks requires the planning of the frontal lobe, the rhythmic regulation of the temporal lobe, and the execution of the motor area. But the two tasks have different cognitive control mechanisms. Synchronous motion coordination tasks require more internal motion sensation, description and extraction, more and stronger information exchange between hands. In other words, alternating motion cooperation is simpler than synchronous motion collaboration and only needs to be executed after planning, while synchronous motion cooperation needs more real-time adjustment when it is executed after planning.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：R311

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