The neural correlates of amplitude of low-frequency fluctuation: a multimodal resting-state MEG and fMRI-EEG study

被引:11
|
作者
Zhang, Jianfeng [1 ,2 ]
Liu, Dong-Qiang [3 ]
Qian, Shufang [3 ]
Qu, Xiujuan [3 ]
Zhang, Peiwen [3 ]
Ding, Nai [4 ,5 ]
Zang, Yu-Feng [6 ,7 ,8 ,9 ]
机构
[1] Shenzhen Univ, Ctr Brain Disorders & Cognit Sci, Shenzhen 518055, Guangdong, Peoples R China
[2] Shenzhen Univ, Coll Psychol, Shenzhen 518055, Peoples R China
[3] Liaoning Normal Univ, Res Ctr Brain & Cognit Neurosci, Dalian 116029, Peoples R China
[4] Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Key Lab Biomed Engn, Minist Educ, Hangzhou 310027, Peoples R China
[5] Zhejiang Lab, Hangzhou 311121, Peoples R China
[6] Hangzhou Normal Univ, Ctr Cognit & Brain Disorders, Affiliated Hosp, Hangzhou 310015, Peoples R China
[7] Hangzhou Normal Univ, TMS Ctr, Deqing Hosp, Deqing 313200, Zhejiang, Peoples R China
[8] Hangzhou Normal Univ, Inst Psychol Sci, Hangzhou 311121, Peoples R China
[9] Zhejiang Key Lab Res Assessment Cognit Impairment, Hangzhou 311121, Peoples R China
基金
中国国家自然科学基金;
关键词
resting state; ALFF; MEG; fMRI; eyes-closed; eyes-open; INTRINSIC BRAIN ACTIVITY; MONKEY VISUAL-CORTEX; FUNCTIONAL CONNECTIVITY; EYES-OPEN; SPATIOTEMPORAL PSYCHOPATHOLOGY; DEFAULT MODE; NETWORKS; DYNAMICS; DEPENDENCE; RESONANCE;
D O I
10.1093/cercor/bhac124
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The amplitude of low-frequency fluctuation (ALFF) describes the regional intensity of spontaneous blood-oxygen-level-dependent signal in resting-state functional magnetic resonance imaging (fMRI). How the fMRI-ALFF relates to the amplitude in electrophysiological signals remains unclear. We here aimed to investigate the neural correlates of fMRI-ALFF by comparing the spatial difference of amplitude between the eyes-closed (EC) and eyes-open (EO) states from fMRI and magnetoencephalography (MEG), respectively. By synthesizing MEG signal into amplitude-based envelope time course, we first investigated 2 types of amplitude in MEG, meaning the amplitude of neural activities from delta to gamma (i.e. MEG-amplitude) and the amplitude of their low-frequency modulation at the fMRI range (i.e. MEG-ALFF). We observed that the MEG-ALFF in EC was increased at parietal sensors, ranging from alpha to beta; whereas the MEG-amplitude in EC was increased at the occipital sensors in alpha. Source-level analysis revealed that the increased MEG-ALFF in the sensorimotor cortex overlapped with the most reliable EC-EO differences observed in fMRI at slow-3 (0.073-0.198 Hz), and these differences were more significant after global mean standardization. Taken together, our results support that (i) the amplitude at 2 timescales in MEG reflect distinct physiological information and that (ii) the fMRI-ALFF may relate to the ALFF in neural activity.
引用
收藏
页码:1119 / 1129
页数:11
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