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Independent support for corticopallidal contributions to schizophrenia-related functional impairment.
Schizophrenia Research ( IF 3.759 ) Pub Date : 2019-12-24 , DOI: 10.1016/j.schres.2019.12.006
Goda Tarcijonas,William Foran,Annie Blazer,Shaun M Eack,Beatriz Luna,Deepak K Sarpal

BACKGROUND Abnormalities between the prefrontal cortex and basal ganglia have been described by numerous studies of schizophrenia (SZ). We recently reported that individuals with first episode SZ who develop greater vocational and social impairments show lower baseline functional connectivity between the globus pallidus (GP) and regions of the intrinsic salience network. Here we extend these findings to probe the integrity of this system in individuals with chronic illness. METHODS All data were obtained from a publicly available Center of Biomedical Research Excellence dataset (http://fcon_1000. PROJECTS nitric.org/indi/retro/cobre.html) that included resting-state fMRI and structural scans, and an array of clinical and neuropsychological measures. Participants with SZ were divided into high- or low-functioning groups based on scores across measures of psychopathology and cognitive functioning. Corticopallidal functional connectivity was examined between low- and high-functioning individuals with SZ and matched healthy control participants. We focused on connectivity between GP structures and a priori regions of the salience network that were significant in our previous study. Exploratory voxel-wise analyses were also conducted. RESULTS Lower functioning individuals with SZ demonstrated less connectivity between bilateral GP externa and nodes within the salience network, relative to healthy controls. No connectivity differences were observed between low- and high-functioning individuals with SZ. Exploratory voxel-wise analyses highlighted additional large-scale corticopallidal abnormalities in lower-functioning participants with SZ. CONCLUSIONS These results confirm our previous work in a more chronic cohort of individuals with SZ. Our findings further advance corticopallidal connectivity as a biomarker of functional impairments in SZ and lay the groundwork for treatment-based studies.
更新日期:2019-12-24

 

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