2012-12-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/660491摘要：於維持姿勢穩定下再進行另一項活動稱為姿勢-上姿勢作業(postural-suprapostual task)，而大腦注意力配置情況為影響此特殊形式之雙重作業表現的主要關鍵因素。過去 關於注意力配置優先性(姿勢優先、上姿勢優先)對姿勢-上姿勢活動的適用性研究多基於 行為表現之推測，缺乏比較活動優先性差異對大腦運作機制影響的探討。本兩年期計劃 擬利用腦電圖事件相關電位(event-related potential, ERP)，配合行為參數之非線性動力學 分析，由動作科學、腦科學與認知科學的觀點，深入探討注意力配置優先性對姿勢-上 姿勢作業內在神經機制與外在動作表現的影響，並比較以不同注意力優先策略學習對動 作表現的適用性與大腦塑性之改變。第一年計劃「注意力配置優先性對姿勢-上姿勢活 動的影響」：擬整合行為參數與腦電圖事件相關電位經主成分分析(principle component analysis, PCA)之結果，探討現行之雙重作業理論對姿勢-上姿勢作業的適用性；第二年 計劃「注意力配置優先性對姿勢-上姿勢活動的學習影響」：擬藉由主成分分析後，腦波 alpha 頻率(8-12 Hz)於空間、時間的變化，探討注意力配置優先性對姿勢-上姿勢作業學 習自動化的影響。本計劃完成後，將可釐清不同注意力配置優先性對姿勢-上姿勢作業 行為表現與神經機制影響之差異，並提供臨床訓練姿勢平衡或多重作業活動時注意力配 置之參考。<br> Abstract: Postural-suprapostural task is defined as postural control takes place while at least one other concurrent task is being performed, and appropriate locus of attentional allocation is considered a critical factor for successful postural-suprapostural execution. Recent studies have indicated that the behavior performance of postural-suprapostural task would be affected by the prioritization of attentional allocation (posture-first vs. supraposture-first); however, the inference of the appropriateness of attention prioritization is primarily limited to behavior observations and lacks direct neural evidences. How the effect of attentional priority between postural and suprapostural tasks on postural-suprapostural performance and its underlying cortical mechanism is rarely understood. By adopting posture-first and supraposture-first strategies for postural-suprapostural task, the purpose of this 2-year research project is to 1) investigate the differences in performance quality and intrinsic neural mechanisms effect of a postural-suprapostural task for healthy adults with the analysis of event-related potential (ERP) and non-linear dynamics of behavior measures; 2) investigate brain plastic changes of motor learning and the appropriateness of strategy use. In the first year, the attention prioritization effect on reciprocity of a postural-suprapostural task will be characterized by integrating the results of behavior performance and ERP after principle component analysis (PCA) with a special focus on validation of prevailing theoretical models. In the second year, the difference of task automaticity for learning a postural-suprapostural task with posture-first/ supraposture-first strategy will be studied through the spatial and time variations in alpha rhythm (8-12 Hz) activity. The present project is expected to have significant contributions not only to gain a better insight to neural correlates of concurrent postural and motor suprapostural tasks, but to optimize treatment strategy for patients with balance or multi-tasking disturbances.注意力配置事件相關電位雙重作業姿勢平衡主成分分析Attentional allocationEvent-related potentialDual-taskPosture BalancePrinciple Component Analysis