不同年龄人脑λ(Lambda)波的初步研究

LAMBDA WAVES OF HUMAN SUBJECTS OF DIFFERENT AGE LEVELS

問題 λ(Lambda)波是一种发现不久而又尚少系统探讨的较新的人脑电活动。厄凡斯(C. C. Evans)在1949年曾首先报导人脑枕叶可见一种所谓“尖波”,至1952年他才定名为λ波。λ波被认为是一种与正常生理心理现象密切相关的电活动。在光亮环境下,眼睛自由观察时,λ波的呈现就显著,但当眼睛注视一点时,该波则消失。

EEG records of Lambda (λ) waves of human subjects of different age levels indicated: 1) The appearance of λ-waves was most marked on Ss under 18 years of age, less obvious on subjects of 18 to 30 years of age, and least in Ss after age 31; 2) The λ-waves showed a higher frequency and a lower voltage and duration in adults than in children; 3) λ-waves more frequently appeared during visual perception, but not when the S engaged in visual imagination; 4) For subjects who manifested "on-response’’ and/or "driving response" in the occipital region, λ-waves were most easily recorded during visual perception.