本文選題：外傾性 + 神經(jīng)質(zhì)�。� 參考：《電子科技大學(xué)》2012年碩士論文

【摘要】：越來(lái)越多的研究發(fā)現(xiàn)人格特征與大腦特定區(qū)域的活動(dòng)特性及解剖結(jié)構(gòu)密切相關(guān)。本研究的目的在于利用靜息態(tài)fMRI檢測(cè)人格特征與BOLD信號(hào)低頻振蕩的局部特性之間是否存在關(guān)聯(lián)。在人格特征與BOLD信號(hào)低頻振蕩同步性(ReHo)的研究中，我們發(fā)現(xiàn)，神經(jīng)質(zhì)個(gè)性維度與ReHo值負(fù)相關(guān)的區(qū)域發(fā)生在左側(cè)的額葉部分，這一結(jié)果為支撐左側(cè)額葉活動(dòng)涉及愉悅情緒處理提供了又一有效證據(jù)。對(duì)于外傾性個(gè)性維度而言，與ReHo值負(fù)相關(guān)的區(qū)域發(fā)生在內(nèi)側(cè)前額葉，由于內(nèi)側(cè)前額葉是大腦默認(rèn)網(wǎng)絡(luò)的重要節(jié)點(diǎn)，這一發(fā)現(xiàn)表明默認(rèn)網(wǎng)絡(luò)的活動(dòng)可以用來(lái)預(yù)測(cè)個(gè)體差異的人格特征。除此之外，腦島、小腦、扣帶回的ReHo值與外傾性個(gè)性維度正相關(guān)，暗示了具有情緒加工、處理功能的腦區(qū)會(huì)對(duì)外傾性這一特質(zhì)的形成產(chǎn)生影響。我們的研究結(jié)果足以說(shuō)明人格特征與自發(fā)的神經(jīng)元活動(dòng)的同步性密切相關(guān)，并為個(gè)體差異的大腦功能活動(dòng)預(yù)測(cè)人格特征提供進(jìn)一步的證據(jù)。 艾森克提出的有關(guān)于外傾性及神經(jīng)質(zhì)個(gè)性維度的生物學(xué)模型引起了研究者們對(duì)揭示其神經(jīng)生物學(xué)基礎(chǔ)的濃厚興趣。在人格特征與BOLD信號(hào)低頻振蕩振幅的研究中，我們利用比率低頻振蕩振幅（fALFF）分析方法探測(cè)艾森克人格維度外傾性及神經(jīng)質(zhì)與slow-4及slow-5頻段的低頻振蕩振幅之間的關(guān)聯(lián)性。我們的研究結(jié)果表明，slow-5頻段的低頻振蕩振幅與外傾性得分正相關(guān)的區(qū)域發(fā)生在內(nèi)側(cè)前額葉及楔前葉，暗示了個(gè)體差異的大腦默認(rèn)網(wǎng)絡(luò)的活動(dòng)可以用來(lái)預(yù)測(cè)人格特征的差異性。slow-5頻段的低頻振蕩振幅值與神經(jīng)質(zhì)個(gè)性維度正相關(guān)的區(qū)域發(fā)生在右側(cè)的前額葉部分，負(fù)相關(guān)的區(qū)域發(fā)生在左側(cè)的額下皮層，這為進(jìn)一步說(shuō)明額葉不對(duì)稱性與神經(jīng)質(zhì)之間的關(guān)系提供了有力的證據(jù)。slow-4頻段的低頻振蕩振幅值與外傾性負(fù)相關(guān)的區(qū)域發(fā)生在左側(cè)的海馬，與神經(jīng)質(zhì)負(fù)相關(guān)的區(qū)域發(fā)生在左側(cè)的顳上回，不僅支撐了外傾性與皮層喚醒水平負(fù)相關(guān)的關(guān)系，而且說(shuō)明個(gè)體差異的人格特征與具有情緒加工、處理功能的腦區(qū)之間存在關(guān)聯(lián)性。總的來(lái)說(shuō)，我們的結(jié)果表明人格特征與特定頻段下的低頻振蕩振幅相關(guān)聯(lián)，并說(shuō)明人格特征與個(gè)體差異的腦功能活動(dòng)之間存在關(guān)聯(lián)。
[Abstract]:More and more studies have found that personality traits are closely related to the activity and anatomical structure of specific regions of the brain. The aim of this study is to detect whether there is a correlation between personality characteristics and the local characteristics of low frequency oscillation of BOLD signals using resting fMRI. In the study of personality characteristics and synchronism of low frequency oscillations of BOLD signals, we found that the negative correlation between neurotic personality dimension and ReHo value occurred in the left frontal lobe. This result provides another valid evidence to support the left frontal lobe activity involved in pleasurable emotional processing. For extroversion personality dimension, the area negatively correlated with ReHo value occurs in the medial prefrontal lobe, because the medial prefrontal lobe is an important node of the brain's default network. This finding suggests that the activity of the default network can be used to predict the personality characteristics of individual differences. In addition, the ReHo values of the cerebral islands, cerebellum and cingulate gyrus are positively correlated with the extroversion personality dimension, suggesting that the brain regions with emotional processing and processing function may have an effect on the formation of extroversion. Our results show that personality traits are closely related to the synchronism of spontaneous neuronal activity and provide further evidence for predicting personality characteristics by individual brain functional activity. The biological model of extroversion and neuroticism proposed by Eysenck has aroused great interest in revealing the basis of neurobiology. In the study of personality characteristics and low frequency oscillation amplitude of BOLD signal, we use the method of ratio low frequency oscillation amplitude analysis to explore the extroversion of Eysenck personality dimension and the correlation between neuroticism and low frequency oscillation amplitude of slow-4 and slow-5. Our results show that the low frequency oscillation amplitude of slow-5 band is positively related to extraversion score in the medial prefrontal lobe and precuneiform lobe. It is suggested that the activity of the brain's default network of individual differences can be used to predict the low frequency oscillation amplitude of personality difference. Slow-5 band and the region positively related to the dimension of neurotic personality occurs in the prefrontal lobe on the right. The negative correlation occurred in the left subfrontal cortex, which provided strong evidence for the relationship between the frontal asymmetry and neuroticism. The low frequency oscillation amplitude of the slow-4 band and the region negatively correlated with extroversion occurred in the left hippocampus. The region negatively related to neuroticism occurs in the left superior temporal gyrus, which not only supports the negative correlation between extroversion and cortical arousal level, but also indicates that personality characteristics of individual differences are associated with emotional processing. There is a correlation between the brain regions of processing function. In general, our results show that personality characteristics are correlated with the amplitude of low frequency oscillations at specific frequencies, and that there is a correlation between personality characteristics and brain function activities of individual differences.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：R749

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本文編號(hào)：1976888