Neural basis of associative learning in Trichotillomania and skin-picking disorder

Autor: Darin D. Dougherty, Amy T. Peters, Jon E. Grant, Tara S. Peris, Emily J. Ricketts, Marta Migó, Tina Chou, Joseph O’Neill, Dan J. Stein, Christine Lochner, Nancy Keuthen, John Piacentini, Thilo Deckersbach
Rok vydání: 2022
Předmět:
Zdroj: Behav Brain Res
ISSN: 0166-4328
DOI: 10.1016/j.bbr.2022.113801
Popis: Disorders such as Trichotillomania (TTM) and skin-picking disorder (SPD) are associated with reduced flexibility and increased internally focused attention. While the basal ganglia have been hypothesized to play a key role, the mechanisms underlying learning and flexible accommodation of new information is unclear. Using a Bayesian Learning Model, we evaluated the neural basis of learning and accommodation in individuals with TTM and/or SPD. Participants were 127 individuals with TTM and/or SPD (TTM/SPD) recruited from three sites (age 18-57, 84% female) and 26 healthy controls (HC). During fMRI, participants completed a shape-button associative learning and reversal fMRI task. Above-threshold clusters were identified where the Initial Learning-Reversals BOLD activation contrast differed significantly (p 
Databáze: OpenAIRE