Theory of mind performance and prefrontal connectivity in adolescents at clinical high risk for psychosis. (April 2021)

• Record Type: Journal Article
• Authors: Ilzarbe, Daniel; Baeza, Inmaculada; de la Serna, Elena; Fortea, Adriana; Valli, Isabel; Puig, Olga; Masias, Mireia; Borras, Roger; Pariente, Jose C.; Dolz, Montserrat; Castro-Fornieles, Josefina; Sugranyes, Gisela
• Is Part Of: Developmental cognitive neuroscience. Volume 48(2021)
• Publication Date: 2021-04
• Subjects: DMN default mode network -- CHR participants at clinical high risk for psychosis -- CHR-nt participants at clinical high risk who did not transition to psychosis -- CHR-t participants at clinical high risk who transitioned to psychosis -- HV healthy volunteers -- RMET reading-the-mind-in-the-eyes test -- fMRI functional magnetic resonance imaging -- gIQ global intelligence quotient -- ToM theory of mind; Adolescence -- High-risk studies -- Psychosis -- Theory of mind -- Functional neuroimaging; Cognitive neuroscience -- Periodicals; Developmental neurobiology -- Periodicals; Neuropsychology -- Periodicals; Neuropsychiatry -- Periodicals; 612.8233
• DOI: 10.1016/j.dcn.2021.100940
• Languages: English
• ISSNs: 1878-9293

Abstract

Highlights: Onset of psychosis was linked to a lack of age-related improvement in theory of mind. Reduced prefrontal connectivity preceded onset of psychosis in high risk youth. High risk youth with lower prefrontal connectivity were at greatest risk of psychosis. Abstract: Theory of mind(ToM) impairment is a key feature of psychotic disorders and has been documented in individuals at clinical high-risk for psychosis (CHR), suggesting that it may predate illness onset. However, no study to date has examined brain functional correlates of ToM in individuals at CHR during adolescence. The "Reading-the-Mind-in-the-Eyes" test was used to measure ToM performance in 50 CHR youth, 15 of whom transitioned to psychosis (CHR-t) at follow-up (12 ± 6 months) and 36 healthy volunteers. Resting-state functional MRI was acquired to evaluate functional connectivity within the default mode network. Group by age interaction revealed an age-positive association in ToM performance in healthy volunteers, which was not present in adolescents at CHR-t. Intrinsic functional connectivity in the medial prefrontal cortex was reduced in adolescents at CHR-t relative to those who did not transition and to healthy volunteers. Survival analyses revealed that participants at CHR with lower medial prefrontal cortex connectivity were at greatest risk of developing psychosis at follow-up. We demonstrate that lack of age-related maturation of ToM and reduced medial prefrontal cortex connectivity both precede the onset of psychosis during adolescence. Medial prefrontal cortex connectivity holds potential as a brain-based marker for the early identification of transition to psychosis.