Neurobiology of Addiction

Addiction is a complex neurological disorder that involves changes in the brain’s reward system, particularly the mesolimbic dopamine pathway. Substances like alcohol, drugs, and even behaviors such as gambling trigger the release of dopamine, reinforcing the behavior and leading to compulsive use. Over time, repeated exposure to addictive substances alters the brain’s chemistry and circuitry, making it difficult for individuals to stop. This neurobiological process is linked to changes in brain regions involved in motivation, decision-making, and impulse control, such as the prefrontal cortex and amygdala. Advances in the neurobiology of addiction are helping to identify new therapeutic targets, including medications that can modulate dopamine receptors, and behavioral interventions designed to rewire the brain’s reward system.

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