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KMID : 1137820070280040477
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의공학회지
2007 Volume.28 No. 4 p.477 ~ p.483
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The Influence of Eye Movement for Acquiring BOLD Signal in V1 : A Study of Simultaneous Measurement of EOG and fMRI
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Chung Jun-Young
Yoon Hyo-Woon
Kim Young-Bo
Park Hyun-Wook
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Abstract
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We have measured EOG and fMRI simultaneously to investigate whether eye movement (blinking mechanism) might influence functional magnetic resonance imaging (fMRI) signal response in the primary visual cortex. $T2^*-weighted$ Echo-Planar Imaging (EPI) with concurrent electrooculogram (EOG) was acquired in four subjects while they viewed a fixation point and a checkerboard with a flickering rate of 8Hz. With the help of EOG information we divided the experimental blocks into two different conditions: fixation and moving eye. We have compared the fMRI data of these two conditions. Our results have shown that there is no difference between these two conditions. This might suggest that eye blinking does not affect BOLD signal changes in the primary visual cortex. This means further that eye blinking can be ignored in data processing
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KEYWORD
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EOG and fMRI simultaneous measurement, eye blinking
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