Volumetric brain abnormalities in polysubstance use disorder patients

Area of Science:

• Neuroimaging
• Addiction Psychiatry
• Neuroscience

Background:

• Polysubstance use disorder is prevalent in addiction treatment centers in Turkey.
• Limited understanding exists regarding the structural brain abnormalities associated with polysubstance use.

Purpose of the Study:

• To investigate structural brain differences between polysubstance use disorder patients and healthy controls.
• To utilize voxel-based morphometry to identify gray matter abnormalities in polysubstance users.

Main Methods:

• Structural magnetic resonance imaging (MRI) scans were acquired from 46 male polysubstance use disorder patients in early abstinence.
• 30 healthy male controls were included for comparison.
• Voxel-based morphometry (VBM) analysis was employed to compare gray matter volume.

Main Results:

• Polysubstance users exhibited significantly smaller gray matter (GM) volumes in multiple brain regions.
• Affected areas included the thalamus, temporal pole, superior frontal gyrus, cerebellum, gyrus rectus, occipital lobe, anterior cingulate cortex, superior temporal gyrus, and postcentral gyrus.

Conclusions:

• Individuals with polysubstance use disorder demonstrate widespread reductions in gray matter volume.
• These structural differences are observed across frontal, temporal, occipital, and parietal lobes, as well as the cerebellum and anterior cingulate cortex.