Background Default network (DN) abnormalities have been identified in patients with chronic schizophrenia using “resting state” functional magnetic resonance imaging (R-fMRI). Here, we examined the integrity of the DN in patients experiencing their first episode of psychosis (FEP) compared with sex- and age-matched healthy controls. Methods We collected R-fMRI data from 19 FEP patients (mean age 24.9±4.8 yrs, 14 males) and 19 healthy controls (26.1±4.8 yrs, 14 males) at 3 Tesla. Following standard preprocessing, we examined the functional connectivity (FC) of two DN subsystems and the two DN hubs (P<0.0045, corrected). Results Patients with FEP exhibited abnormal FC that appeared largely restricted to the dorsomedial prefrontal cortex (dMPFC) DN subsystem. Relative to controls, FEP patients exhibited weaker positive FC between dMPFC and posterior cingulate cortex (PCC) and precuneus, extending laterally through the parietal lobe to the posterior angular gyrus. Patients with FEP exhibited weaker negative FC between the lateral temporal cortex and the intracalcarine cortex, bilaterally. The PCC and temporo-parietal junction also exhibited weaker negative FC with the right fusiform gyrus extending to the lingual gyrus and lateral occipital cortex, in FEP patients, compared to controls. By contrast, patients with FEP showed stronger negative FC between the temporal pole and medial motor cortex, anterior precuneus and posterior mid-cingulate cortex. Conclusions Abnormalities in the dMPFC DN subsystem in patients with a FEP suggest that FC patterns are altered even in the early stages of psychosis.

In the context of the COVID-19 pandemic and the state of emergency that the government of Spain declared, the rapid adaptation of health services is of paramount importance to preserve access to and continuity of service delivery. This research note underscores the importance of ensuring a sufficient quantity of methadone take-home doses for patients on methadone maintenance treatment (MMT) to maximize their adherence to government-imposed lockdown restrictions and social distancing measures designed to curtail the spread of SARS-CoV-2. We evaluate the impact of COVID-19 on take-home medication (number of days provided) in a methadone clinic in Barcelona (Catalonia, Spain). This work conveys that we should consider maintaining the take-home practices that we adopted in response to the pandemic, even after the pandemic has abated.

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