Li Jiwen, Wang Shuai, Du Tengfei, Tang Jianchao, Yang Juan
Faculty of Psychology, Southwest University, No. 2 Tiansheng Street, Beibei District, Chongqing 400715, China.
Key Laboratory of Cognition and Personality, Southwest University, Chongqing 400715, China.
Brain Sci. 2024 Jul 22;14(7):736. doi: 10.3390/brainsci14070736.
Self-ambivalence, a prevalent phenomenon in daily life, has been increasingly substantiated by research. It refers to conflicting self-views and evaluations, primarily concerning self-worth and morality. Previous behavioral research has distinguished self-worth and moral ambivalence, but it remains unclear whether they have separable neural bases. The present study addressed this question by examining resting-state brain activity (i.e., the fractional amplitude of low-frequency fluctuations, fALFF) and connectivity (i.e., resting-state functional connectivity, RSFC) in 112 college students. The results found that self-worth ambivalence was positively related to the fALFF in the orbitofrontal cortex (OFC) and left superior parietal lobule (SPL). The RSFC strength between the SPL and precuneus/posterior cingulate cortex (PCC) was positively related to self-worth ambivalence. Moral ambivalence was positively associated with the fALFF in the left SPL (extending into the temporoparietal junction) and right SPL. The RSFC strengths between the left SPL/TPJ and OFC, as well as the RSFC strengths between the right SPL as a seed and the bilateral middle and inferior temporal gyrus, were associated with moral ambivalence. Overall, the neural bases of self-worth and moral ambivalence are associated with the SPL and OFC, involved in attentional alertness and value representation, respectively. Additionally, the neural basis of moral ambivalence is associated with the TPJ, responsible for mentalizing.
自我矛盾心理是日常生活中一种普遍存在的现象，越来越多的研究证实了这一点。它指的是相互冲突的自我认知和评价，主要涉及自我价值和道德。以往的行为研究区分了自我价值矛盾心理和道德矛盾心理，但它们是否具有可分离的神经基础仍不清楚。本研究通过检测112名大学生的静息态脑活动（即低频波动分数振幅，fALFF）和脑连接性（即静息态功能连接，RSFC）来解决这个问题。结果发现，自我价值矛盾心理与眶额皮质（OFC）和左侧顶上小叶（SPL）的fALFF呈正相关。SPL与楔前叶/后扣带回皮质（PCC）之间的RSFC强度与自我价值矛盾心理呈正相关。道德矛盾心理与左侧SPL（延伸至颞顶联合区）和右侧SPL的fALFF呈正相关。左侧SPL/颞顶联合区与OFC之间的RSFC强度，以及以右侧SPL为种子点与双侧颞中回和颞下回之间的RSFC强度，均与道德矛盾心理有关。总体而言，自我价值和道德矛盾心理的神经基础分别与参与注意力警觉和价值表征的SPL和OFC相关。此外，道德矛盾心理的神经基础与负责心理化的颞顶联合区有关。
