The resting-state functional connectivity at human visual cortex revealed by fast functional magnetic resonance imaging
碩士 === 國立臺灣大學 === 醫學工程學研究所 === 102 === Conventional resting-state fMRI often looks for spontaneous BOLD signals at frequencies below 0.1Hz. In this study, we used high-speed single-slice EPI with TR = 100 ms to investigate the functional connectivity between hemispheric visual cortex. We sacrificed...
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Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2014
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Online Access: | http://ndltd.ncl.edu.tw/handle/26087239141795815259 |
Summary: | 碩士 === 國立臺灣大學 === 醫學工程學研究所 === 102 === Conventional resting-state fMRI often looks for spontaneous BOLD signals at frequencies below 0.1Hz. In this study, we used high-speed single-slice EPI with TR = 100 ms to investigate the functional connectivity between hemispheric visual cortex. We sacrificed the coverage of the brain without compromising the spatial resolution in order to achieve a high sampling rate (10 Hz). With the high sampling rate, we were able to prevent the physiological noise from aliasing with the BOLD signals of interest and investigate the spontaneous BOLD signal at frequencies above 0.1Hz. We used time series correlation and oscillatory envelope correlation to assess the functional connectivity. Our results show that left visual cortex and right visual cortex are highly correlated at the frequency band lower than 0.08Hz and at the frequency band between 0.1Hz and 0.2Hz.
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