Structural and cognitive deficits in chronic carbon monoxide intoxication: a voxel-based morphometry study.

Area of Science:

• Neuroscience
• Radiology
• Toxicology

Background:

• Carbon monoxide (CO) intoxication can lead to delayed encephalopathy (DE), characterized by fluctuating neurological and psychiatric symptoms.
• The relationship between brain structural changes and neuropsychological deficits in DE remains unclear.

Purpose of the Study:

• To investigate the association between gray matter volume (GMV) differences and cognitive impairments in patients with CO intoxication.
• To compare brain morphology and cognitive function in CO patients with and without DE.

Main Methods:

• Magnetic resonance imaging (MRI) and neuropsychological tests were used.
• Compared GMV and cognitive function in 11 CO patients with DE, 11 CO patients without DE, and 15 healthy controls.
• Correlated GMV with cognitive performance.

Main Results:

• CO patients exhibited reduced GMV in basal ganglia, amygdala, hippocampus, and frontal/parietal lobes compared to controls.
• Lower GMV in specific brain regions correlated with impaired perceptual organization and processing speed.
• CO patients with DE showed significantly lower GMV and cognitive function than those without DE.

Conclusions:

• Chronic CO intoxication is associated with poorer cognitive and morphological outcomes, particularly in patients with DE.
• Structural gray matter abnormalities are implicated in the pathophysiology of DE in chronic CO-intoxicated individuals.