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Negative overgeneralization is associated with anxiety and mechanisms of pattern completion in peripubertal youth
Social Cognitive and Affective Neuroscience ( IF 4.2 ) Pub Date : 2021-07-16 , DOI: 10.1093/scan/nsab089
Dana L McMakin 1, 2, 3 , Adam Kimbler 1 , Nicholas J Tustison 4 , Jeremy W Pettit 2, 3 , Aaron T Mattfeld 1, 3
Affiliation  

This study examines neural mechanisms of negative overgeneralization, the increased likelihood of generalizing negative information, in peri-puberty. Theories suggest that weak pattern separation [overlapping representations are made distinct, indexed by dentate gyrus/ cornu ammonis (CA)3 hippocampal subfield activation] underlies negative overgeneralization. We alternatively propose that neuro-maturational changes that favor pattern completion (cues reinstate stored representations, indexed by CA1 activation) are modulated by circuitry involved in emotional responding [amygdala, medial prefrontal cortices (mPFC)] to drive negative overgeneralization. Youth (n = 34, 9–14 years) recruited from community and clinic settings participated in an emotional mnemonic similarity task while undergoing magnetic resonance imaging. At study, participants indicated the valence of images; at test, participants made recognition memory judgments. Critical lure stimuli, which were similar to images at study, were presented at test, and errors (‘false alarms’) to negative relative to neutral stimuli reflected negative overgeneralization. Negative overgeneralization was related to greater and more similar patterns of activation in CA1 and both dorsal mPFC (dmPFC)and ventral mPFC (vmPFC) for negative relative to neutral stimuli. At study, amygdala exhibited greater functional coupling with CA1 and dmPFC during negative items that were later generalized. Negative overgeneralization is rooted in amygdala and mPFC modulation at encoding and pattern completion at retrieval.

中文翻译:

负面过度概括与青春期青年的焦虑和模式完成机制有关

这项研究检查了在青春期前后负面过度概括的神经机制,即概括负面信息的可能性增加。理论表明,弱模式分离[重叠表示变得不同,由齿状回/角状回 (CA)3 海马亚场激活索引] 是负面过度概括的基础。我们还提出,有利于模式完成的神经成熟变化(提示恢复存储的表征,由 CA1 激活索引)由参与情绪反应的电路 [杏仁核、内侧前额叶皮质 (mPFC)] 调节,以驱动负性过度概括。从社区和诊所招募的青年(n = 34, 9-14 岁)在接受磁共振成像时参与了情绪记忆相似性任务。学习时,参与者表示图像的价值;在测试中,参与者做出识别记忆判断。与研究图像相似的关键诱饵刺激在测试中呈现,相对于中性刺激的负面错误(“错误警报”)反映了负面过度概括。负性过度概括与 CA1 和背侧 mPFC (dmPFC) 和腹侧 mPFC (vmPFC) 中相对于中性刺激的负向激活模式更大和更相似有关。在研究中,杏仁核在后来被推广的负面项目中表现出与 CA1 和 dmPFC 更大的功能耦合。负过度泛化植根于编码时的杏仁核和 mPFC 调制以及检索时的模式完成。与研究中的图像相似,在测试中呈现,相对于中性刺激的负向错误(“错误警报”)反映了负向过度概括。负性过度概括与 CA1 和背侧 mPFC (dmPFC) 和腹侧 mPFC (vmPFC) 中相对于中性刺激的负向激活模式更大和更相似有关。在研究中,杏仁核在后来被推广的负面项目中表现出与 CA1 和 dmPFC 更大的功能耦合。负过度泛化植根于编码时的杏仁核和 mPFC 调制以及检索时的模式完成。与研究中的图像相似,在测试中呈现,相对于中性刺激的负向错误(“错误警报”)反映了负向过度概括。负性过度概括与 CA1 和背侧 mPFC (dmPFC) 和腹侧 mPFC (vmPFC) 中相对于中性刺激的负向激活模式更大和更相似有关。在研究中,杏仁核在后来被推广的负面项目中表现出与 CA1 和 dmPFC 更大的功能耦合。负过度泛化植根于编码时的杏仁核和 mPFC 调制以及检索时的模式完成。负性过度概括与 CA1 和背侧 mPFC (dmPFC) 和腹侧 mPFC (vmPFC) 中相对于中性刺激的负向激活模式更大和更相似有关。在研究中,杏仁核在后来被推广的负面项目中表现出与 CA1 和 dmPFC 更大的功能耦合。负过度泛化植根于编码时的杏仁核和 mPFC 调制以及检索时的模式完成。负性过度概括与 CA1 和背侧 mPFC (dmPFC) 和腹侧 mPFC (vmPFC) 中相对于中性刺激的负向激活模式更大和更相似有关。在研究中,杏仁核在后来被推广的负面项目中表现出与 CA1 和 dmPFC 更大的功能耦合。负过度泛化植根于编码时的杏仁核和 mPFC 调制以及检索时的模式完成。
更新日期:2021-07-16
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