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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林發暄 | |
| dc.contributor.author | Fu-Hua Yang | en |
| dc.contributor.author | 楊馥華 | zh_TW |
| dc.date.accessioned | 2021-06-15T01:18:13Z | - |
| dc.date.available | 2011-08-22 | |
| dc.date.copyright | 2011-08-22 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2011-08-16 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/42631 | - |
| dc.description.abstract | Intra-individual variability in behaviors can be an important indicator of central nervous system integrity. This study aims at understanding the origins of the behavioral reaction time (RT) variability across trials using magnetoencephalography (MEG) in a two-choice reaction time visuomotor task. We classify trials into the fast-response (FR) and the slow-response (SR) groups according to the RTs and we study the oscillatory activity and evoked responses. We found that the pre-stimulus alpha band (8-14 Hz) oscillatory power (0.4 s before the visual stimulus onset) around right posterior sensors was significantly higher in the SR group than in the FR group (p<0.001). The visual and motor evoked responses have significantly smaller amplitude in the SR group than in the FR group. With respect to the onset of the visual stimulus, the peak timing difference between FR and SR groups was only 0~8 ms in the visual cortex and 85 ms in the motor cortex. These results suggest that the posterior alpha power may modulate the brain activity in visual and motor cortices to cause inter-trial RT variability. Such a modulation can be observed after 150 ms from the visual stimulus onset by MEG. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T01:18:13Z (GMT). No. of bitstreams: 1 ntu-100-R98548040-1.pdf: 1071901 bytes, checksum: a8200c597c4c693e31c56fbd8b5e0840 (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 摘要 ........................................................................................ ii
ABSTRACT ............................................................................. iii CONTENTS ............................................................................ iv List of Figures and Table ....................................................... vi CHAPTER 1 INTRODUCTION..................................................... 1 1.1 Background and Problem Statement ................................. 2 1.2 Literature Review ...............................................................3 1.3 Objectives of Study ........................................................... 5 CHAPTER 2 METHOD ............................................................... 7 2.1 Materials ............................................................................8 2.1.1 Experiment Paradigm ..................................................... 8 2.1.2 Stimuli ............................................................................ 8 2.1.3 Participants .................................................................... 9 2.1.4 Data Acquisition ............................................................. 9 2.2 Data Analysis ................................................................... 10 2.2.1 Preprocessing ............................................................... 10 2.2.2 Classification of Trials ................................................... 10 2.2.3 Analysis of Oscillatory Response .................................... 11 2.2.4 Analysis of Evoked Response ......................................... 12 CHAPTER 3 RESULT ................................................................. 14 3.1 Behavioral Responses ........................................................ 15 3.2 Oscillatory Power .............................................................. 16 3.3 Latencies of Evoked Response ........................................... 18 3.4 Magnitudes of Evoked Response ........................................ 23 CHAPTER 4 DISCUSSION ........................................................... 24 4.1 Alpha Oscillations .............................................................. 25 4.2 Latencies of Evoked Response ............................................ 25 4.3 Magnitudes of Evoked Response ........................................ 27 REFERENCES ............................................................................. 29 | |
| dc.language.iso | en | |
| dc.subject | 腦磁波 | zh_TW |
| dc.subject | 反應時間 | zh_TW |
| dc.subject | 行為變異度 | zh_TW |
| dc.subject | α振盪 | zh_TW |
| dc.subject | 視覺 | zh_TW |
| dc.subject | 運動 | zh_TW |
| dc.subject | behavioral variability | en |
| dc.subject | visuomotor task | en |
| dc.subject | alpha power | en |
| dc.subject | reaction time | en |
| dc.subject | magnetoencephalography | en |
| dc.title | 腦磁活動與自發運動反應時間差異之關係 | zh_TW |
| dc.title | Neuromagnetic correlates of behavioral variability in voluntary visuomotor tasks | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 99-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蔡尚岳,林益如 | |
| dc.subject.keyword | 反應時間,行為變異度,α振盪,視覺,運動,腦磁波, | zh_TW |
| dc.subject.keyword | reaction time,behavioral variability,alpha power,visuomotor task,magnetoencephalography, | en |
| dc.relation.page | 31 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2011-08-16 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 醫學工程學研究所 | zh_TW |
| 顯示於系所單位： | 醫學工程學研究所 | |
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