Time-varying inter-hemispheric coherence during corpus callosotomy

被引：12

作者：

Okumura, Eiichi ^{[1
]}

Iwasaki, Masaki ^{[2
]}

Sakuraba, Rie ^{[1
]}

Itabashi, Izumi ^{[1
]}

Osawa, Shin-ichiro ^{[2
]}

Jin, Kazutaka ^{[1
]}

Itabashi, Hisashi ^{[1
]}

Kato, Kazuhiro ^{[1
]}

Kanno, Akitake ^{[3
]}

Tominaga, Teiji ^{[2
]}

Nakasato, Nobukazu ^{[1
]}

机构：

[1] Tohoku Univ, Dept Epileptol, Sch Med, Sendai, Miyagi 9808574, Japan

[2] Tohoku Univ, Dept Neurosurg, Sch Med, Sendai, Miyagi 9808574, Japan

[3] Tohoku Univ, Inst Dev Aging & Canc, Dept Funct Brain Imaging, Sendai, Miyagi 9808574, Japan

来源：

CLINICAL NEUROPHYSIOLOGY | 2013年 / 124卷 / 11期

基金：

日本学术振兴会;

关键词：

Corpus callosum; Bilateral synchrony; Intra-operative EEG; Epilepsy surgery; Wavelet transform coherence; Trend analysis; EEG COHERENCE; EPILEPTIFORM DISCHARGES; WAVELET COHERENCE; LENNOX-GASTAUT; ICTAL EEG; CALLOSUM; BRAIN; SEIZURES; SECTION; SPIKE;

D O I：

10.1016/j.clinph.2013.05.004

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Objective: Corpus callosotomy limits the bilateral synchrony of epileptic discharges. However, the instantaneous changes in bilateral synchrony during corpus callosotomy are unclear. The present study investigated how and when bilateral synchrony is suppressed in the anterior and then posterior steps of corpus callosotomy. Methods: Intra-operative scalp electroencephalography (EEG) was recorded simultaneously with surgical video for six patients who underwent total corpus callosotomy for medically intractable drop attacks. The time-varying EEG inter-hemispheric coherence was quantified by wavelet transform coherence and trend analysis. Results: The 4-13 Hz coherence decreased after corpus callosotomy in five patients. Significant decrease in coherence was observed only during the posterior step of callosal sectioning in three patients, but throughout both steps in two patients. Conclusions: Decrease in inter-hemispheric coherence is not always correlated with the stages of callosal sectioning. Inter-hemispheric coherence is decreased during the final stage of corpus callosotomy and the effect is maximized after sectioning is completed. Significance: Various patterns of coherence decrease suggest individual variations in the participation of the corpus callosum in the genesis of bilateral synchrony. Time-varying inter-hemispheric EEG coherence is useful to monitor the physiological completeness of corpus callosotomy. (c) 2013 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.

引用

页码：2091 / 2100

页数：10

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