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Identification of a Novel dynamic Red Blindness in Human by Event-related Brain Potentials

Journal of Huazhong University of Science and Technology(Medical Sciences) 2010年第6期30卷 786-791页

作者：张佳华孔维佳杨仲乐 Department of Otorhinolaryngology Union HospitalTongji Medical CollegeHuazhong University of Science and Technology Institute of Biomedical Engineering South-central University for Nationalities

dynamic color is an important carrier that takes information in some special ***,up to the present,there are no available and objective tests to evaluate dynamic color *** investigate the characteristics of dynamic color processing,we adopted two patterns of visual stimulus called "onset-offset" which reflected static color stimuli and "sustained moving" without abrupt mode which reflected dynamic color stimuli to evoke event-related brain potentials (ERPs) in primary color amblyopia patients (abnormal group) and subjects with normal color recognition ability (normal group).ERPs were recorded by Neuroscan *** results showed that in the normal group,ERPs in response to the dynamic red stimulus showed frontal positive amplitudes with a latency of about 180 ms,a negative peak at about 240 ms and a peak latency of the late positive potential (LPP) in a time window between 290 and 580 *** the abnormal group,ERPs in response to the dynamic red stimulus were fully lost and characterized by vanished amplitudes between 0 and 800 *** significant difference was noted in ERPs in response to the dynamic green and blue stimulus between the two groups (P>0.05).ERPs of the two groups in response to the static red,green and blue stimulus were not much different,showing a transient negative peak at about 170 ms and a peak latency of LPP in a time window between 350 and 650 *** results first revealed that some subjects who were not identified as color blindness under static color recognition could not completely apperceive a sort of dynamic red stimulus by ERPs,which was called "dynamic red blindness".Furthermore,these results also indicated that low-frequency ERPs induced by "sustained moving" may be a good and new method to test dynamic color perception competence.

关键词： dynamic color blindness event-related brain potentials

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