红光临界闪烁视频率在正常人、精神分裂症患者和酒精中毒患者间的差异

Differences of critical twinkle visual frequency for red light among normal persons,schizophrenia and alcoholism patients

目的:比较正常人、精神分裂症患者和酒精中毒患者对红光的临界闪烁视频率的反应特征与差异。方法:选择1990-03/1994-03在延边脑科医院住院的精神分裂症患者163例和酒精中毒患者250例,同期选取正常人250例。实验经医院伦理委员会审批,且受试者均知情同意。用IP-1型低频信号发生器测试正常人、精神分裂症患者和酒精中毒患者的临界闪烁视频率。IP-1型低频信号发生器的放置高度根据被测人的眼睛高度决定。红色发光二极管与被测人眼睛的水平距离为1m(远、近视眼均可配带眼镜)。红色发光二极管闪烁频率由IP-1型低频振荡器来直接调整在20～50Hz。通过问答方式寻找临界闪烁频率点,每例患者重复多次直到找寻到可信点。结果:精神分裂症患者163例,酒精中毒患者250例,正常人250例均进入结果分析。①精神分裂症患者和酒精中毒患者对红光临界闪烁视频率低于正常人[分别为(29.19±0.49),(26.72±0.97),(33.18±0.32)Hz],差异有显著性意义(t=9.37,11.61,P<0.01)。精神分裂症患者对红光临界闪烁视频率高于酒精中毒患者,差异无显著性意义(P>0.05)。②正常人、精神分裂症患者和酒精中毒患者各年龄组临界闪烁视频率比较:各年龄组临界闪烁视频率比较差异无显著性意义(P>0.05)。结论:精神分裂症患者与酒精中毒患者对红光的临界闪烁视频率均低于正常人,酒精中毒患者略低于精神分裂症患者。

AIM： To compare the reflection feature and difference of critical twinkle visual frequency for red light in normal persons, schizophrenia and alcoholism patients. METHODS： A total of 163 schizophrenia inpatients and 250 alcoholism inpatients admitted at Yanbian Brain Hospital between March 1990 and March 1994 were selected. And 250 common people were selected at the same period. All the subjects were informed of and agreed with the treatment, with the approval of hospital ethnics committee. The twinkle visual frequency of red light was controlled directly as 20-50 Hz by IP-1 type low-frequency signal generator, which was placed according to the subject＇s eye altitude, and the horizontal range between the tube and the subject was 1 m （glass wearing was allowable）. The critical twinkle visual frequency was tested by questionnaire and answer in common people, schizophrenia and alcoholism patients. Repeated respond was used to find out the most reliable frequency. RESULTS： All of 163 schizophrenia patients, 250 alcoholism patients and 250 normal persons were involved in the result analysis. ①The critical twinkle visual frequency of red light in the normal people was significantly higher than those in the patients with schizophrenia and alcoholism [（33.18±0.32）, （29.19±0.49）, （26.72±0.97） Hz, t=9.37, 11.61, P 〈 0.01]. In comparison of the critical twinkle visual frequency of red light between schizophrenia and alcoholism patients, there were insignificant differences （P 〉 0.05）. ②No significant difference was found among the age groups of all the subjects （P〉 0.05）. CONCLUSION： The critical twinkle visual frequency of red light in normal persons is higher than that in schizophrenia patients and alcoholism patients. And the critical twinkle visual frequency in alcoholism patients is a little lower than that in schizophrenia patients.