Differences in the release of the neurotransmitter dopamine may help explain why men are up to twice as likely as women to develop alcoholism, a new study says.
Dopamine, which plays a number of roles in the brain, provides a feeling of pleasure when it's released by experiences such as having sex or taking drugs.
How the study was done
The study included male and female college-age volunteers who underwent brain scans after consuming an alcoholic or non-alcoholic drink. After consuming similar amounts of alcohol, men showed greater dopamine release than women.
The increased release occurred in a part of the brain called the ventral striatum, which is strongly associated with pleasure, reinforcement and addiction formation, according to the researchers, from Columbia and Yale universities. Their findings were published in the journal Biological Psychiatry.
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