Based on the current model that increased FAAH is associated with dysfunction in the amygdala-PFC circuit believed to be impaired in BPD coupled with findings of lower AEA in BPD [33, 34], we hypothesized that FAAH levels, quantified using [11C]CURB positron emission tomography (PET), would be greater in the PFC and amygdala of BPD compared with healthy controls. Here, FAAH is linked to Borderline personality disorder.