title: Social-cognitive brain function and connectivity during visual perspective-taking in autism and schizophrenia.
abstract: Autism spectrum disorder (ASD) and schizophrenia are neurodevelopmental conditions that are characterized by significant social impairment. Emerging genomic and neurobiological evidence has increasingly pointed to shared pathophysiologic mechanisms in the two disorders. Overlap in social impairment may reflect similar underlying neural dysfunction in social-cognitive brain networks, yet few studies have directly compared brain function and communication between those with ASD and schizophrenia.
  
  
  
  Outpatients with schizophrenia (n=36), ASD (n=33), and healthy volunteers (n=37) completed a visual perspective-taking task during functional neuroimaging at 3T to assess similarities and differences in fronto-temporal brain function and connectivity during social-cognitive processing. Analyses employed general linear models to examine differences in amplitude of BOLD-signal response between disorder groups, and computed functional connectivity coefficients to investigate differences in the connectivity profiles of networks implicated in social cognition.
  
  
  
  Despite similar behavioral impairments, participants with ASD and schizophrenia evidenced distinct neural abnormalities during perspective-taking. Functional activation results indicated reduced temporo-parietal junction and medial prefrontal activity in ASD compared to schizophrenia (all Puncor<0.002). Functional connectivity analyses further revealed significantly greater local orbitofrontal connectivity in ASD than schizophrenia (all PFDR<0.028) during perspective-taking. Differences in brain activation and connectivity were unrelated to antipsychotic medication dose.
  
  
  
  Autism and schizophrenia are characterized by similar social-cognitive impairments that may stem from different underlying abnormalities in the functional organization and communication of the social brain.
authors.affiliation: School of Social Work, University of Pittsburgh, United States; Western Psychiatric Institute and Clinic, University of Pittsburgh School of Medicine, United States. Electronic address: sme12@pitt.edu.
authors.forename: Shaun M
authors.initials: SM
authors.lastname: Eack
authors.affiliation: School of Social Work, University of Pittsburgh, United States.
authors.forename: Jessica A
authors.initials: JA
authors.lastname: Wojtalik
authors.affiliation: Western Psychiatric Institute and Clinic, University of Pittsburgh School of Medicine, United States; Massachusetts Mental Health Center Public Psychiatry Division of the Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.
authors.forename: Matcheri S
authors.initials: MS
authors.lastname: Keshavan
authors.affiliation: Western Psychiatric Institute and Clinic, University of Pittsburgh School of Medicine, United States; Department of Neurology, University of Pittsburgh School of Medicine, United States.
authors.forename: Nancy J
authors.initials: NJ
authors.lastname: Minshew
mesh_terms: D000293:Adolescent; D000328:Adult; D001321:Autistic Disorder / Q000150:complications* / Q000000981:diagnostic imaging / Q000523:psychology*; D001921:Brain / Q000000981:diagnostic imaging / Q000503:physiopathology*; D001931:Brain Mapping; D003072:Cognition Disorders / Q000000981:diagnostic imaging / Q000209:etiology*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D009434:Neural Pathways / Q000000981:diagnostic imaging / Q000502:physiology; D010775:Photic Stimulation; D012559:Schizophrenia / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology*; D012565:Schizophrenic Psychology; D012919:Social Behavior; D014796:Visual Perception / Q000502:physiology; D055815:Young Adult
keywords: Autism; Fmri; Functional connectivity; RDoC; Schizophrenia; Social cognition