arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2602.07233eess.IVcs.CVcs.LGq-bio.NC
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从静息态fMRI中提取驱动心理障碍的根因性脑活动

Extracting Root-Causal Brain Activity Driving Psychopathology from Resting State fMRI

University of Pittsburgh(匹兹堡大学)

Eric V. Strobl

AI总结:

本文提出SOURCE方法,通过双层结构性因果模型从静息态fMRI中提取驱动心理障碍的根因性脑活动,提升症状维度的可解释性和解剖特异性。

摘要:

精神疾病影像学研究通常将影像模式与诊断标签或综合症状分数相关联,从而产生模糊的关联,掩盖了潜在的机制。我们相反地寻求识别根因性地图——局部BOLD扰动,这些扰动引发病理级联反应,并将它们选择性地与症状维度联系起来。我们引入了一个双层结构性因果模型,通过独立的潜在源将受试者间的症状结构与受试者内的静息态fMRI连接起来,这些潜在源具有局部的直接效应。基于此模型,我们开发了SOURCE(症状导向的根因性要素揭示)方法,该方法将可解释的症状轴与一组简洁的局部驱动因素联系起来。实验表明,SOURCE恢复了与根因性BOLD驱动因素一致的局部地图,并在可解释性和解剖特异性方面优于现有方法。

英文摘要:

Neuroimaging studies of psychiatric disorders often correlate imaging patterns with diagnostic labels or composite symptom scores, yielding diffuse associations that obscure underlying mechanisms. We instead seek to identify root-causal maps -- localized BOLD disturbances that initiate pathological cascades -- and to link them selectively to symptom dimensions. We introduce a bilevel structural causal model that connects between-subject symptom structure to within-subject resting-state fMRI via independent latent sources with localized direct effects. Based on this model, we develop SOURCE (Symptom-Oriented Uncovering of Root-Causal Elements), a procedure that links interpretable symptom axes to a parsimonious set of localized drivers. Experiments show that SOURCE recovers localized maps consistent with root-causal BOLD drivers and increases interpretability and anatomical specificity relative to existing comparators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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