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| The study of functional magnetic resonance imaging by different color light stimulating the visual cortex |
| WANG Jun, LU Huan, XU Hong-yu, TAN Xiao-bin， ZHONG Fu-xing, XU Fan-yong |
| Department of Radiology, the First Affiliated Hospital, Gannan Medical College, Ganzhou Jiangxi 341000, China |
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Abstract Objective: To study the change of signal strength of visual cortex by stimulating it with different color． Materials and Methods: Forty-eight volunteers accepted the stimulation of red, green and blue light． Functional imaging analysis AFNI software was used for processing the raw data, computer automatically generated time signal intensity curves. And using statistical methods to compare them. Results: Occipital lobe in the district of cortex were excited in 48 cases, the average signal intensity of green stimulation was higher than that of red stimulation by 17．5％(P<0．05), the average signal intensity of blue stimulation was higher than that of green by 9．6％(P<0．05)． The average signal intensity on the right was higher than that of the left by 18％(P<0．05)． It was discovered that other brain excited areas were also found in the corpus geniculatum laterale and superior colliculus, anterior tectum of brain stem, parietal cortex． Conclusion: The statistical analysis of fMRI suggests that the signals of occipital lobe cortex is increased through three color stimulation, among them, blue stimulation is the most sensitive, and the change is more obvious in the right side than that in the left side．
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Received: 29 December 2009
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2010, Vol. 21 
