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ID 16472
Eprint ID
16472
フルテキストURL
Thumnail 93_53.pdf 515 KB
タイトル(別表記)
Studies on readiness potentials II. Readiness potentials in patients with occlusive cerebro-vascular disorders
著者
馬塲 義美 岡山大学医学部脳神経外科学教室
抄録
Readiness potential is a slow negative shift of brain electrical potential preceding voluntary movements. The amplitude of the potential is maximum over the area of the contralateral motor cortex which represents contraction of muscles. But this is distributed in a rather diffuse fashion and can also be obtained in bilateral regions. In this study, the readiness potential was obtained by averaging the EEG synchronized with repetitive hand movements. The potentials were recorded in the central scalp region in two groups; Group 1 as control consisted of six healthy right-handed persons, and Group 2 of seventeen patients with occlusive cerebro-vascular disorders who had varying degrees of motor weakness and who had undergone superficial temporal artery-middle cerebral artery anastomosis. The potentials in group 2 were obtained by carrying out voluntary movements on the unaffected side, if not mentioned. The relationship between preoperative readiness potentials and surgical results was studied. 1. In the control group, hand movements elicited the potential (N) with the amplitude being 7.7±0.8 μV (mean+standard error of means) on the ipsilateral side to the movement and 8.9±1.0 μV on the opposite side. N on the opposite side was significantly higher than on the ipsilateral side (p<0.02 t-test). 2. In group 2, N was 3.2±0.7 μV on the side of the hand movements and 5.4±0.8 μV on the opposite side. These values were signigicantly lower than those in group 1 (p<0.02 t-test). 3. Four patients with normal amplitudes (more than 5 μV) on the scalp of the lesioned side showed good results from surgery. On the other hand, four patients with very low amplitudes (less than 2 μV) had poor results. One patient out of eight with low amplitude (between 2 μV and 5 μV) showed good results, five patients showed fair results, and the other two patients showed poor results. 4. Readiness potentials after surgery were recorded in 10 patients. N was 3.6±0.8 μV on the ipsilateral side to the movement and 6.0±1.4 μV on the opposite side. 5. Readiness potentials recorded by repetitive hand movements of the affected side were mostly very low in voltage (less than 2 μV ). These results suggest that readiness potentials could be a useful criteria for STA-MCA anastomosis.
キーワード
運動準備電位
脳血管障害
STA-MCA吻合術
発行日
1981-02-28
出版物タイトル
岡山医学会雑誌
出版物タイトル(別表記)
Journal of Okayama Medical Association
93巻
1-2号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
53
終了ページ
62
ISSN
0030-1558
NCID
AN00032489
資料タイプ
学術雑誌論文
オフィシャル URL
https://www.jstage.jst.go.jp/article/joma1947/93/1-2/93_1-2_53/_article/-char/ja/
関連URL
http://www.okayama-u.ac.jp/user/oma/index.html
言語
Japanese
著作権者
岡山医学会
論文のバージョン
publisher
査読
有り
Eprints Journal Name
joma