成人脑涨落图年龄变化特点的研究

该工作研究了１２０名２０－７９岁正常成人脑涨落图的年龄变化特点。结果表明：（１）从２０岁到５０岁，Ｓ系谱线活动向低频方向集中，６０岁后谱线又向高频方向有所移动；（２）部分谐振系的随龄变化表现明显，其中以Ｓ１７系变化最为敏感；（３）脑区间相干活动和各脑区的连频活动随年龄增强，脑能量分布的有序性逐渐破坏；（４）增龄性变化主要反映在优势脑区（左前脑）和优势脑轴（左前／右后脑）上，与脑高级机能活动密切相关的左前脑的退行性变化最为明显。上述结果反映了脑功能的减退是一个非线性的多层次的复杂过程。

A STUDY ON AGE-RELATED CHANGE OF ENCEPHALOFLUCTUOGRAPH IN ADULTS

A study on age-related change of encephalofluctuograph was accomplished in 120 subjects aged 20 to 79 years. The results showed: (1)The activities of S-spectra moved toward low-frequency with age from 20 to 59 years,and then shifted backward high-frequency to some extent after 60 years of age. (2)There were obvious age-related changes in some spectral series,in which S17-series were the most susceptible to aging. (3)The coherence between or among different brain areas and the continuous frequencies in all brain areas enhanced in the aging process, and the power distribution was disordered gradually with age; (4)Age-related changes were displayed chiefly in the dominant brain area (left-anterior brain) and dominant brain axis (left-anterior/right-posterior brain), and the most distinct degradation of functions was observed in the left-anterior brain which is closely related to higher brain function. The results indicated that age-related changes of brain function was a nonlinear and a multi-level complex process.