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λ Έλ κΈ° κ³Όμ κ΄λ ¨ λ μ°κ²°λ§μ ν¨μ¨μ μ¬μ‘°μ§νμ μ°κ΄λ μΈμ§ ν΅μ μν
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Όλ¬Έ (μμ¬) -- μμΈλνκ΅ λνμ : μ¬νκ³Όνλν μ¬λ¦¬νκ³Ό, 2021. 2. μ΅μ§μ.Appropriate reconfiguration of the brain functional network based on various given situations came to the fore as an important factor for the adaptive function in younger adults. Since the role of reconfiguration in older adults needs to be clarified, this study aimed to examine the relationship between brain network reconfiguration and adaptive function even in older adults who had experienced both structural and functional brain change over a lifetime. A total of 83 elderly people who participated in the Korean Social Life and Health Aging Project (KSHAP) completed the resting-state and multi-source interference task (MSIT) fMRI protocol. They underwent 10-minute resting state fMRI acquisition with their eyes open, and 6-minute MSIT state to measure their performance on the cognitive control task. Older people who reconfigured their task-positive networks less from the resting-state to the MSIT showed better performance both in the MSIT, and the neuropsychological tests measuring working memory function. These results were still significant even controlling age, sex, years of education, total gray matter volume, and the mean movement between two states. Especially, the less reconfiguration in the fronto-parietal network (FPN) was significantly associated with better performance on both the cognitive control task and the working memory tests. The MSIT performance was not affected by the individual difference in the configuration of both rest and task state. Yet, the working memory function was significantly affected by the individual difference in the configuration of task state. These results indicated that less and efficient reconfiguration was associated with better adaptive function even in elderly people. In addition, the FPN stability between two different states played a significant role in the cognitive function of elderly adults. Moreover, the cognitive control in older adults was associated with task switching rather than the optimization of the states. On the other hand, the working memory was still associated with the optimization of the task state. This study extended the analysis method of neuroimaging and suggested a novel approach to investigate the cognitive control of older adults.λμ κΈ°λ₯μ μ°κ²°λ§ (brain functional network)μ μν©μ λ°λΌ ν¨μ¨μ μΌλ‘ μ¬μ‘°μ§ννλ λ₯λ ₯ (network reconfiguration)μ μ μ μΈκ΅¬μμ μ μμ μΈ κΈ°λ₯κ³Ό μ°κ΄μ±μ΄ μλ κ²μΌλ‘ μλ €μ Έ μλ€. λ³Έ μ°κ΅¬λ λμ ꡬ쑰μ , κΈ°λ₯μ λ³νκ° λ°μνλ λ
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κΈ°μλ κ·Έλ¬ν μ°κ΄μ±μ΄ λνλ μ μλμ§ νꡬνλ κ²μ λͺ©μ μΌλ‘ νμλ€. Korean Social Life and Health Aging Project (KSHAP) μ°κ΅¬μ μ°Έμ¬ν λμ΄μ§μ L μ§μκ³Ό K μ§μμ μ°Έκ°μ 83λͺ
μ λμμΌλ‘ μ무 κ³Όμ λ μννμ§ μλ ν΄μ§κΈ°μ μΈμ§ ν΅μ λ₯Ό μꡬνλ λ€μ€κ°μκ³Όμ (MSIT) κΈ°λ₯μ μ기곡λͺ
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κΈ°μ΅ κΈ°λ₯μμλ κ³Όμ λ₯Ό μνν λμ μ°κ²°λ§ μ‘°μ§νμ μ΅μ νκ° μ€μν μν μ νκ³ μμμ νμΈνλ€. λ³Έ μ°κ΅¬ κ²°κ³Όλ λ μ°κ²°λ§ μ¬μ‘°μ§νκ° μ μμ μΈ λ
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νκ² λ°νμ§ κ²μ΄λ€.Chapter 1. Introduction 1
1.1. Cognitive Aging in Older adults 1
1.2. Cognitive Control Function in the Cognitive Aging 3
1.3. MSIT: an fMRI task to measure cognitive control 4
1.4. Brain Network Reconfiguration and the General Cognitive Ability 6
1.5. Brain Network Reconfiguration in the Aging 8
1.6. Objectives and Hypotheses 9
Chapter 2. Methods 11
2.1. Participants & Procedures 11
2.2. Multi-Source Interference Task 13
2.3. Neuropsychological Tests 16
2.4. MRI Acquisition and Preprocessing 19
2.5. Calculating the Network Similarity Index of the Brain Network 27
2.6. Individual Resting/Task State Functional Connectivity Configuration 29
2.7. Statistical Analysis 30
Chapter 3. Results 31
3.1. Behavioral Results 31
3.2. Brain Network Similarity Index & Cognitive Control Functions 36
3.3. Impact of Resting-State and Task Configuration on Brain Reconfiguration 43
3.4. MSIT activation & Cognitive Control Functions 46
Bibliography 60
κ΅λ¬Έμ΄λ‘ 68Maste