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Brain and Nerve No to Shinkei Volume 16, Issue 6 （June 1964）

Brain and Nerve 脳と神経 16巻6号（1964年6月発行）

Japanese English

研究

てんかん脳波の基礎律動に関する考察—成人てんかん脳波の周波数分析 STUDIES ON THE BASIC PATTERN OF EEG IN EPILEPSY:Part 2 : Frequency analysis of EEG in adult epilepsy 森温理 ¹ Atsuyoshi MORI ¹ ¹東邦大学医学部神経精神科 ¹Dept. of Neuropsychiatry, Toho Univ. School of Med. pp.481-487

発行日 1964年6月1日 Published Date 1964/6/1

DOI https://doi.org/10.11477/mf.1406201654

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Abstract 文献概要
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I．まえがき

　脳波の周波数分析はGrass　＆　Gibbs （1938）^1）やWalter （1943）^2）3）をはじめとする自働分析装置の発見によつて推進され，現在では性能の高い分析器が広く用いられるにいたつている。装置そのものにもなお種々の問題が存在しているが^4）5），これによつて各周波数要素間の数量的な比較が可能となり，脳波の研究の上に新しい展開がみられることは疑いをいれない。

　本邦においても脳波分析に関する問題はしばしばとりあげられ^6）〜10），またLos Angelesで行なわれた脳波分析に関するコンファレンス（1961）のなかでBrazier^11）は脳波分析についての簡潔な歴史的展望をおこなつている。

EEGs of 105 cases of adult epilepsy aged 20 to 39 years and 40 cases of normal controls within same range of age were selected to be analysed by auto-matic frequency analyser. EEG recording was per-formed by monopolar one from left frontal, temporal, central, parietal and occipital areas. The filtered band waves of our analyser are δ(2-4c/s), θ₁(4-6c/s), θ₂(6-8c/s), α₁(8-10c/s), α₂(10-13c/s), β₁(13-20c/s) and β₂(20-30c/s). The results were as fol-lows:

1) Of the patterns of frequency spectrum, the standard type was frequently seen in control and the types which show the increase of slow components was characteristic in epilepsy. Bi-peaks and nonpeak type were also seen more in epilepsy.

2) Peak frequency in α₁ band was shown in 84.6%-92.5% of control and in 66.2%-77.2% of epilepsy. In epilepsy,θ₁ and θ₂ band-peak were also seen.

3) The values of energy % of α₁ and α₂ bands were higher in control throughout all areas and, on the contrary, those of δ, θ₁ and β₂ bands were higher in epilepsy. But, there was no constant difference between them β₁ and β₂ bands. The variation of value of energy % was larger in epilepsy than in control. As to the cortical distribution of each frequency components there was same tendency be-tween control and epilepsy.

4) Of voltage level, the values of summation of absolute voltage of all bands were higher in about 25% in temporal and 15% in other areas of epilepsy than of control.

5) Variability coefficient in occipital area between control and epilepsy was most impressionable in and bands; namely, the former was high in control and the latter was high in epilepsy.