Study reveals altered prefrontal connectivity in OCD during abstract sequence processing

Summary

This study examines neural circuitry differences in abstract sequential processing between individuals with Obsessive-compulsive disorder (OCD) and healthy controls. Using task-based functional and effective connectivity analyses, researchers found that while both groups share a common circuit architecture involving the rostrolateral prefrontal cortex (RLPFC), anterior cingulate cortex/dorsolateral prefrontal cortex (ACC/DLPFC), supplementary motor area (SMA), middle temporal gyrus (MTG), and temporo-occipital junction (TOJ), the functional coordination within this circuit differs significantly. Healthy controls showed stronger prefrontal control and coordination, while individuals with OCD exhibited increased direct connectivity between the RLPFC and posterior regions (MTG). The ACC/DLPFC and MTG function as central hubs of information flow, with task inputs entering via the TOJ and propagating through the circuit. These findings contribute to neurobiological models of OCD by identifying a novel circuit supporting abstract sequencing.