NeuroImage:杏仁核体积的个体差异预测了整个青春期皮层下和认知控制网络之间功能连接的变化

2022-01-20 影像小生 MedSci原创

杏仁核结构年复一年的变化有力地预测了随后几年SC-CC连接的减弱,而SC-CC连接的广泛增加,预测了随着时间的推移纹状体体积的减小。

青春期是对情绪的认知控制区域的相关结构和功能成熟的关键时期。有证据表明,这一过程是由杏仁核和纹状体结构的发育变化以及皮层下(SC)和认知控制(CC)网络之间功能连接的转变所引导的。

Brittany K.Taylor等研究了这种结构和功能的发展变化在多大程度上相互预测彼此的时间。

该研究的目的是确定杏仁核体积是否与皮层下(SC)和认知控制(CC)网络的内部和内部网络连接强度(即功能连接或其网络模拟功能网络连接或FNC)有关。这两者都与情绪的认知控制密切相关。

该研究利用了一个大型多点研究的数据,研究对象是典型发育中的儿童和青少年,他们每年都接受评估,为期三年。基于现有文献,该研究假设杏仁核体积的变化和FNC的纵向模式随时间存在交互可预测性。该研究进一步评估了FNC和其他相关神经基质之间的关系,包括SC和CC功能网络内的脑区和其他关键边缘结构,以及在静息态下测量的杏仁核和其他FNC之间的关系。这使得能够评估靶向SC和CC网络与杏仁核体积之间关系的特异性。

控制年龄,性别(0 =“男性”,1 =“女性”)后,杏仁体体积与网络间SC-CC连接的相关性

该研究中,对179名青少年(9-15岁)每年进行MRI扫描,连续三年。每年都测量杏仁核、纹状体的体积以及SC和CC静息态网络内部和之间的连接。使用随机-截距交叉滞后面板模型测试了结构和功能的人内和人间变化的互预测性。

散点图显示(a)杏仁核体积与SC-CC FNC间的关联,以及(b)显著的交叉预测路径,其中杏仁核体积的变化与SC-CC FNC在随后几年的变化相关。

杏仁核体积在某一年的变化显著且明确地预测了下一年SC-CC连接的偏差,例如杏仁核体积的增加与下一年SC-CC连接的减少相关连接的偏差并不能预测杏仁体体积随时间的变化。相反,SC-CC连接更广泛的组水平变化可预测纹状体体积的后续偏差。没有看到杏仁体或纹状体体积和网络内连接测量之间的任何交叉可预测性。

杏仁核结构年复一年的变化有力地预测了随后几年SC-CC连接的减弱,而SC-CC连接的广泛增加,预测了随着时间的推移纹状体体积的减小。这些特定的结构功能关系可能有助于青少年情绪控制的发展。

原文出处

Individual differences in amygdala volumes predict changes in functional connectivity between subcortical and cognitive control networks throughout adolescence

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    2022-01-21 paperyu

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