Alcohol-induced brain deficit in alcohol dependence

Area of Science:

• Neuroscience
• Medical Imaging
• Addiction Research

Background:

• Alcohol dependence has severe health and behavioral consequences.
• The underlying neurobiological mechanisms of alcohol dependence are not fully understood.

Purpose of the Study:

• To investigate the neurobiological deficits in alcohol dependence using Percent Amplitude of Fluctuation (PerAF).
• To assess the potential of PerAF as a biomarker for identifying brain activity differences in alcohol dependence.

Main Methods:

• Recruited 29 patients with alcohol dependence and 29 healthy controls.
• Applied PerAF to analyze regional brain activity.
• Utilized Receiver Operating Characteristic (ROC) curve analysis to evaluate diagnostic accuracy.

Main Results:

• Alcohol dependence showed decreased PerAF in the left orbitofrontal cortex, right higher visual cortex, right supramarginal gyrus, right postcentral gyrus, and bilateral cerebellum posterior lobe.
• Decreased PerAF demonstrated high diagnostic accuracy (AUC=0.953, sensitivity=96.6%, specificity=86.2%) in distinguishing patients from controls.
• Daily alcohol consumption negatively correlated with activity in the right cerebellum posterior lobe and right higher visual cortex.

Conclusions:

• Alcohol dependence disrupts the cerebellar-visual-orbitofrontal circuit.
• PerAF is a promising biomarker for detecting regional brain activity deficits in alcohol dependence.