The Link Between Mental Illness and Drug Addiction
Friday, December 14th, 2007
An often asked question is, “why do so many addicts suffer from other mental illnesses?" and also, “which came first, the mental illness or the addiction?” Researchers at the Indiana University Medical School are looking beyond the widespread conclusion that addiction is the result of ‘self-medication’ in response to an existing mental health challenge, and are investigating the function and health of the brain itself. Dual diagnosis is common yet difficult to treat. Clinical reports cite that at least half the people who seek help with addiction or mental-health treatment have co-occurring disorders. The research team led by Andrew Chambers, MD, has found that the link between addiction and mental illness may be isolated to a walnut-sized part of the brain, the ‘amygdala’ as related to its integrity and development. Their findings are promising, leading toward improved effectiveness in the treatments for dual diagnosis.
"Given that the experimental and control rats were raised in the same tightly controlled conditions, the only difference being their brain status, researchers concluded that the integrity of the amygdala was the root cause of both impaired fear behavior and heightened drug response."
