Summary
Highlights
Long-term alcohol and drug abuse physically changes the brain, causing it to shrink and damaging its information processing ability. The limbic system, which controls emotion, behavior, motivation, memory, and olfaction, is significantly affected. When someone uses drugs or alcohol, the limbic system releases dopamine, causing a feeling of pleasure. However, with prolonged abuse, the brain reduces dopamine production, leading to a diminished ability to experience pleasure from any source, causing individuals to lose interest in activities they once enjoyed.
The frontal lobe of the brain also shrinks and its function is impaired. This area is crucial for decisions, choices, and distinguishing between right and wrong. When the frontal lobe is compromised, impulse control for drinking or drug use is lost. The amygdala, the brain's emotional center, is normally regulated by the frontal lobe. Without proper control, it becomes hypersensitive to stress, leading to extreme mood swings, panic, and constant worry, making many addicts and alcoholics perpetually fearful.
Heavy drinking and drug use also damage the brain's cellular structure. Gray cells control thinking and feeling, while white cells facilitate communication between them. Persistent substance abuse destroys white cells, severing communication pathways and disrupting proper information flow. Although the brain can reroute these pathways using remaining white cells, it requires complete abstinence and time for this healing process to occur.
Despite the frightening negative effects, there is hope for recovery. If an individual completely stops drinking and taking drugs, the brain begins to heal. Cognitive function can improve, brain shrinkage can be reversed, and new neural pathways can form, allowing for a return to normal brain function. With sustained abstinence, full physical recovery is possible.