Interrelations between dopamine and serotonin producing sites and regions of the default mode network.

Interrelations between dopamine and serotonin producing sites and regions of the default mode network.
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DOI:
10.1002/hbm.25264
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发表时间:
2021-02-15
影响因子:
4.8
通讯作者:
Bär KJ
Bär KJ
中科院分区:
医学2区
文献类型:
--
作者:
de la Cruz F;Wagner G;Schumann A;Suttkus S;Güllmar D;Reichenbach JR;Bär KJ

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最近的功能磁共振成像(fMRI)研究表明,默认模式网络(DMN)中的血氧水平依赖(BOLD)信号波动与中脑/脑干中产生多巴胺(DA)和5-羟色胺(5-HT)递质的单胺能核中的信号波动在功能上紧密相关。我们结合加速功能磁共振成像采集频谱格兰杰因果关系和相干分析,调查这些领域之间的因果关系。这两种方法独立地导致了类似的结果,并证实了在静息状态下存在自上而下的信息流,其中核心DMN区域的活动影响了产生DA/5-HT的神经调节中心的活动。我们发现潜伏期从毫秒到秒不等,受试者间变异性很高,可能归因于静息状态。我们的新发现为人类大脑的功能组织提供了新的见解。频谱格兰杰因果关系和相干性分析揭示了静息状态下存在自上而下的信息流,其中核心DMN区域的活动影响中脑/脑干中多巴胺和5-羟色胺产生部位的活动。
Recent functional magnetic resonance imaging (fMRI) studies showed that blood oxygenation level‐dependent (BOLD) signal fluctuations in the default mode network (DMN) are functionally tightly connected to those in monoaminergic nuclei, producing dopamine (DA), and serotonin (5‐HT) transmitters, in the midbrain/brainstem. We combined accelerated fMRI acquisition with spectral Granger causality and coherence analysis to investigate causal relationships between these areas. Both methods independently lead to similar results and confirm the existence of a top‐down information flow in the resting‐state condition, where activity in core DMN areas influences activity in the neuromodulatory centers producing DA/5‐HT. We found that latencies range from milliseconds to seconds with high inter‐subject variability, likely attributable to the resting condition. Our novel findings provide new insights into the functional organization of the human brain. Spectral Granger causality and coherence analysis revealed the existence of top‐down information flow in the resting‐state condition, where activity in core DMN areas influences activity in dopamine and serotonin producing sites in the midbrain/brainstem.
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