博士 / 國立交通大學 / 資訊科學與工程研究所 / 96 / The aim of this study was to investigate the differences of brain dynamics between the use of allocentric reference frames and egocentric reference frames during spatial navigation. A tunnel task was designed to classify subjects into allocentric or egocentric spatial representation users. Despite of the differences of mental spatial representation, behavioral performance in general were compatible between the two strategies subjects in the tunnel task. Task-related EEG dynamics in both tonic and phasic power changes were analyzed using independent component analysis (ICA), time-frequency and non-parametric static test. Results supported the dissociation brain activities between the uses of allocentric and egocentric reference frames. Both tonic and phasic power changes were significantly different between the navigation strategy groups. Subjects who preferred to use the allocentric spatial representation showed stronger activation in occipital area during path integration whereas subjects using the egocentric reference frames showed stronger activation in parietal area during path integration. The distinct brain regions involved in the navigation process suggested that encodings of allocentric and egocentric reference frames were via the ventral and dorsal neural network respectively.
| Identifer | oai:union.ndltd.org:TW/096NCTU5394111 |
| Date | January 2008 |
| Creators | CHIU TE-CHENG, 邱德正 |
| Contributors | LIN CHIN-TENG, 林進燈 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | en_US |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 56 |
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