Frontal cortex gray matter volume alterations in pathological gambling occur independently from substance use disorder

Addiction Biology
Evangelos ZoisMira Fauth-Bühler

Abstract

Neuroimaging in pathological gambling (PG) allows studying brain structure independent of pharmacological/neurotoxic effects occurring in substance addiction. Because of high comorbidity of PG with substance use disorder (SUD), first results on structural deficits in PG are controversial. The current investigation is the first to examine gray matter (GM) volume alterations in PG controlling for the impact of SUD by comparing non-comorbid (PGPURE) and two comorbid (PGALCOHOLand PGPOLY) groups. Two hundred and five individuals were included in the analysis: 107 patients diagnosed with PG and 98 healthy controls (HCs). We employed voxel-based morphometry to look for GM volume differences between the groups controlling for age, smoking and depression. GM decreases in the superior medial and orbital frontal cortex occur independently of substance use in PGPUREcompared with HCs. The frontal pattern of GM decrease was comparable with PGALCOHOLgroup where additionally GM volume was decreased in the anterior cingulate but increased in the amygdala. Moreover, regions in PGALCOHOL + POLYwith reduced GM volume were the medial frontal, anterior cingulate and occipital lobe regions. PGALCOHOL + POLYnot only exhibited structural deficits in c...Continue Reading

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