Heavy Alcohol Use May Slow Brain Growth: Study
Heavy use of alcohol may slow the rate of growth in developing brains, according to a study conducted in monkeys.
The study, published in the journal eNeuro, shows that heavy alcohol use reduced the rate of brain growth by 0.25 milliliters per year for every gram of alcohol consumed per kilogram of body weight.
In human terms, that is the equivalent of four beers per day, said researchers from the Oregon Health and Science University in the US.
"Chronic alcohol self-intoxication reduced the growth rate of brain, cerebral white matter and subcortical thalamus," researchers said in a statement.
They measured brain growth through magnetic resonance imaging of 71 rhesus macaques that voluntarily consumed ethanol or beverage alcohol.
The researchers precisely measured intake, diet, daily schedules and health care, thus ruling out other factors that tend to confound results in observational studies involving people.
The findings help validate previous research examining the effect of alcohol use on brain development in people.
Lead author Tatiana Shnitko, a research assistant professor at the Oregon Health and Science University, said previous research has shown the brain has a capacity to recover at least in part following the cessation of alcohol intake.
However, it is not clear whether there would be long-term effects on mental functions as the adolescent and young adult brain ends its growth phase, researchers said.