The bidirectional relationship between sleep and obsessive-compulsive spectrum disorders (OCSDs), chronic tic disorders (CTDs), and attention-deficit/hyperactivity disorder (ADHD) is not well understood. To better treat individuals with these co-occurring sleep and developmental neuropsychiatric conditions, it is necessary to determine the common neural underpinnings to then target with treatment. Research has implicated dysregulated cortico-striatal-thalamo-cortical (CSTC) neurocircuitry in the…