發(fā)布時間：2018-02-27 07:48

  本文關鍵詞： 功能磁共振成像 數學歸納推理 交替運動協(xié)作 同步運動協(xié)作　出處：《電子科技大學》2011年碩士論文　論文類型：學位論文

【摘要】：認知的研究在很長的一段時間內都是基于純粹心理學的,隨著實驗方法的進步和影像技術的發(fā)展,我們已經能獲得關于大腦結構與功能的重要信息,從而對認知現象錯綜復雜的神經生理機制有了更深的了解。本文就利用功能磁共振成像(functional Magnetic Resonance Image, fMRI)在數學歸納推理和雙手運動協(xié)作任務中的應用,來探討各自腦認知功能的潛在神經機制。 數學歸納推理是重要的邏輯認知過程,為了探究其神經基礎及實驗任務難度與認知強度間的關系,我們設計了包含簡單數學歸納推理、復雜數學歸納推理的任務組實驗和數學計算的對照組實驗,并對被試進行了fMRI數據的采集。成像結果表明簡單數學歸納推理主要激活左側角回,復雜數學歸納推理主要激活左側額葉上回和雙側的角回。此外簡單推理中左側角回的激活強度與任務的難度系數有正相關性,復雜推理中左側額上回的激活強度與任務的難度系數有正相關性。這些結果表明角回和額葉上回在不同難度的數學歸納推理任務中有著重要的作用:簡單推理中的任務難度主要調節(jié)左側角回所主管的認知成分,復雜推理中的任務難度主要調節(jié)額上回所主管的認知成分。 在雙手運動協(xié)作研究中,我們設計了包含交替運動協(xié)作和同步運動協(xié)作兩個條件的手指敲擊實驗,并對被試進行了fMRI數據的采集。從腦功能激活和腦網絡兩個方面比較了兩種運動協(xié)作任務的神經機制的異同,并分析了其產生的原因。根據結果我們有以下結論:兩種任務的認知控制都需要額葉的計劃和顳葉的節(jié)律性調節(jié)及運動區(qū)的執(zhí)行來完成,但兩種任務具有不同的認知控制機制。同步運動協(xié)作任務較交替協(xié)作任務需要更多的內在的運動感覺、描述和提取,更多更強的雙手間信息交互,更多的實時的節(jié)律調節(jié)。也就是說,交替運動協(xié)作較同步運動協(xié)作簡單且只需要計劃好后執(zhí)行,而同步運動協(xié)作在計劃好后執(zhí)行時,還需要更多的實時的調整。
[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.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：R311

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