Kristina Sabaroedin, Adeel Razi, Sidhant Chopra, Nancy Tran, Andrii Pozaruk, Zhaolin Chen, Amy Finlay, Barnaby Nelson, Kelly Allott, Mario Alvarez-Jimenez, Jessica Graham, Hok P Yuen, Susy Harrigan, Vanessa Cropley, Sujit Sharma, Bharat Saluja, Rob Williams, Christos Pantelis, Stephen J Wood, Brian O'Donoghue, Shona Francey, Patrick McGorry, Kevin Aquino, Alex Fornito
Dysfunction of fronto-striato-thalamic (FST) circuits is thought to contribute to dopaminergic dysfunction and symptom onset in psychosis, but it remains unclear whether this dysfunction is driven by aberrant bottom-up subcortical signalling or impaired top-down cortical regulation. We used spectral dynamic causal modelling of resting-state functional MRI to characterize the effective connectivity of dorsal and ventral FST circuits in a sample of 46 antipsychotic-naïve first-episode psychosis patients and 23 controls and an independent sample of 36 patients with established schizophrenia and 100 controls...
January 5, 2023: Brain