How Alcohol Affects Brain Chemistry
Alcohol quickly reaches the brain after consumption, altering neurotransmitter activity. It enhances the inhibitory effects of gamma-aminobutyric acid and suppresses excitatory glutamate signaling, which slows communication between neurons and produces sedation and impaired coordination.
Short-Term Cognitive and Behavioral Changes
Even moderate drinking can temporarily reduce reaction time, impair judgment, and affect memory formation. Heavy or binge drinking may cause blackouts, blurred vision, and difficulty with balance and speech.
Long-Term Risks to Brain Structure and Function
Chronic alcohol use is linked to brain shrinkage, reduced white matter integrity, and an increased risk of alcohol use disorder. Long-term effects can include persistent memory problems, reduced attention span, and higher vulnerability to mental health conditions. For more details, see the overview at https://www.niaaa.nih.gov/alcohol-health/overview-alcohol-consumption/effects-alcohol-brain.
