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Electrophysiological sex-dimorphism as early risk markers of alcohol use in adolescence

<title>Abstract</title> Heavy drinking during adolescence is associated to alterations in the electrophysiology of the brain. However, some of these alterations are observable at pre-consumption stages. To identify the brain activity profiles associated with alcohol consumption and to address its causes, we examined the power spectra and functional excitation-inhibition ratio in a cohort of 55 adolescents within a two-stage study separated by a two-year follow-up. Our results indicate that power-spectra in beta-band showed a positive correlation with alcohol use during both phases of the study (1st: rho = 0.34, p = 0.042; 2nd: rho = 0.37; p = 0.02) and a negative correlation with excitation-inhibition ratio (1st: p &lt; 0.05; rho=-0.30; 2nd: p &lt; 0.01; rho = -0.43). Finally, biological sex …

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