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Systemic physiological noise in fMRI has clinical relevance
2025-08-24
psychiatry and clinical psychology
Title + abstract only
View on medRxiv
Show abstract
Functional magnetic resonance imaging (fMRI) is central to studying neurobiological mechanisms, yet fMRI has limited clinical utility, highlighting the need for novel approaches. We show that a component of the fMRI signal--the systemic low-frequency oscillation (sLFO), linked to blood flow and physiological measures of arousal--indexes trait- and state-level drug use phenotypes. In individuals who chronically use nicotine, sLFO amplitude increased during abstinence and correlated with heightene...
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