在奖励处理过程中,任务诱导的停用功能障碍与严重抑郁症可能的亚型中的低自尊有关
Antonia K Jüllig1, Sandi Hebib1, Helena Metzker1
1Section for Experimental Psychopathology and Neuroimaging, Department of General Psychiatry, University Hospital Heidelberg, Heidelberg, Germany.
Brain and behavior
|June 14, 2024
概括
大型抑郁症 (MDD) 的低自尊与前前带皮层 (pgACC) 的大脑活动受损有关. 在MDD患者中这种功能障碍可能是与奖励处理相关的特定亚型的特征.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 医疗成像医学成像
背景情况:
- 低自尊是主要抑郁障碍 (MDD) 的常见症状.
- 以前的研究表明,自尊不高与默认模式网络中的大脑活动变化之间存在联系,特别是前前带皮层 (pgACC).
- 已经确定了一种独特的MDD亚型,在奖励处理过程中在pgACC和腹状条纹体中过度激活.
研究的目的:
- 通过功能磁共振成像 (fMRI) 来研究MDD中低自尊的神经基础.
- 为了确定患有低自尊心的MDD患者是否表现出明显的病理生理学.
- 测试假设,鉴定到的MDD亚型与pgACC和腹部条状过激活的特征是低自尊.
主要方法:
- 八十三名MDD患者在执行欲望-理由困境任务时接受了fMRI.
- 罗森伯格自尊度量 (RSES) 和蒙哥马利-奥斯伯格抑郁评分度量进行了管理.
- 在奖励处理过程中的大脑活动与RSES分数相关分析,控制抑郁症严重程度.
主要成果:
- 包括pgACC和腹状条纹体在内的前额-状状网络中的活动与RSES得分有负相关性,即使控制了抑郁症严重程度.
- 患有受损任务诱导的pgACC失活的MDD患者报告说,与保持失活的患者相比,他们的自尊心显著降低.
结论:
- 在MDD中,低自尊与任务诱导的pgACC失活的功能障碍有关.
- 这些发现表明,自尊心低的MDD患者可能代表一种特定的亚型,其特点是改变了奖励处理电路.
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