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  本文關(guān)鍵詞：基于同步EEG-fMRI采集的情緒認(rèn)知重評數(shù)據(jù)特征融合分析研究　出處：《自動化學(xué)報》2016年05期 　論文類型：期刊論文

  更多相關(guān)文章： 腦電 功能磁共振成像 典型相關(guān)分析 認(rèn)知重評 特征融合

【摘要】：腦電(Electroencephalography,EEG)與功能磁共振成像(Functional magnetic resonance imaging,f MRI)為腦科學(xué)研究提供了互補(bǔ)的時空信息.為研究大腦在對情緒圖片采取認(rèn)知重評策略時的神經(jīng)活動,基于同步采集的EEG-f MRI數(shù)據(jù),應(yīng)用典型相關(guān)分析、經(jīng)驗(yàn)?zāi)B(tài)分解及k-均值聚類等算法對融合情緒數(shù)據(jù)進(jìn)行交叉關(guān)聯(lián)和盲源分離,得到空間上的f MRI圖像和與之對應(yīng)的EEG時間演變信號.結(jié)果表明:時域上,CCA分離出的腦電成分在認(rèn)知重評狀態(tài)下有明顯的晚期正電位(Late positive potential,LPP)(潛伏期200 ms~900 ms)出現(xiàn),而且認(rèn)知重評策略誘發(fā)下的LPP波幅明顯小于觀看負(fù)性誘發(fā)的LPP波幅(F(1,224)=28.72,P0.01),而大于觀看中性誘發(fā)的LPP波幅(F(1,224)=63.32,P0.01);與之對應(yīng)的空域上,可以明顯地看出和情緒調(diào)節(jié)相關(guān)的扣帶回,額葉、顳葉等區(qū)域有明顯激活區(qū),采用情緒認(rèn)知重評策略時的腦區(qū)激活強(qiáng)度明顯小于觀看負(fù)性狀態(tài),而大于觀看中性,且觀看中性狀態(tài)下被激活的與情緒相關(guān)的區(qū)域相對較少.研究表明,這種融合數(shù)據(jù)分析技術(shù)通過計(jì)算兩種模態(tài)數(shù)據(jù)之間潛在的線性相關(guān)性,可以有效地分離出大腦在時空上神經(jīng)活動情況,達(dá)到了同時描繪出大腦神經(jīng)活動的時間信息與空間信息的效果.
[Abstract]:Electroencephalography. EGG and functional magnetic resonance imaging. FMRI provides complementary temporal and spatial information for brain science research, and is based on synchronous EEG-f MRI data to study the neural activity of the brain when it adopts cognitive reassessment strategies for emotional images. Using canonical correlation analysis, empirical mode decomposition and K-means clustering algorithms, the fusion emotional data are cross-correlated and blind source separation. The spatial f MRI image and the corresponding EEG time evolution signal are obtained. The results show that: in time domain. The EEG components isolated by CCA had significant late positive positive potential under cognitive reassessment. LPPN (latent period 200 ms~900 Ms) appeared, and the amplitude of LPP induced by cognitive reappraisal strategy was significantly lower than that of LPP induced by negative viewing. The results showed that there was a significant difference between the two groups (P 0.01), while the amplitude of LPP was higher than that of the neutral LPP (63.32). In the corresponding airspace, the cingulate gyrus, frontal lobe, temporal lobe and other regions associated with emotional regulation can be seen to have obvious activation areas. The activation intensity of the brain area was significantly lower than that of the watching negative state, but greater than that of the viewing neutral, and there were relatively few emotion-related areas activated in the viewing neutral state. The results showed that the activation intensity of the brain area was significantly lower than that of the watching neutral state. By calculating the potential linear correlation between the two modal data, this fusion data analysis technique can effectively separate the brain neural activity in time and space. At the same time, it can describe the temporal and spatial information of brain nerve activity.
【作者單位】： 常州大學(xué)信息科學(xué)與工程學(xué)院;南京醫(yī)科大學(xué)附屬常州市第二人民醫(yī)院影像科;南京大學(xué)社會學(xué)院心理系;
【基金】：國家自然科學(xué)基金項(xiàng)目(61201096;51307010) 常州市科技項(xiàng)目(CE20145055) 江蘇省青藍(lán)工程資助~~
【分類號】：TP311.13
【正文快照】： 引用格式鄒凌,嚴(yán)永,楊彪,李文杰,潘昌杰,周仁來.基于同步EEG-f MRI采集的情緒認(rèn)知重評數(shù)據(jù)特征融合分析研究.自動化學(xué)報,2016,42(5):771-781Feature Fusion Analysis of Simultaneously Recorded EEG-f MRI inEmotion Cognitive ReappraisalZOU Ling1YAN Yong1YANG Biao1LI We

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