The resting-state functional connectivity at human visual cortex revealed by fast functional magnetic resonance imaging
Date Issued
2014
Date
2014
Author(s)
Li, Lu-yi
Abstract
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.
Subjects
核磁共振
功能性核磁共振影像
靜態功能性核磁共振影像
視覺
功能性連接
相關
Type
thesis
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