Brain Scans Can Predict Which Alcoholics Are Most Likely to Relapse

For any addiction, external cues and stress can trigger cravings that are hard to resist, and the latest research points to an area of the brain that might be responsible for sabotaging recovery.

The study, which was published in JAMA Psychiatry, found that those with elevated activity in a region called the ventromedial prefrontal cortex (vmPFC) even while they were at rest were eight times more likely to drink again within 90 days than those whose vmPFC was calmer when they were feeling relaxed.

The findings are “a major contribution,” to understanding alcohol addiction, said Dr. Nora Volkow, director of the National Institute on Drug Abuse, in a co-written editorial that accompanied the research.

The authors, led by Rajita Sinha, professor of psychiatry at Yale University, studied the brain activity of 45 recovering alcoholics who were in a treatment program based on the 12 steps of Alcoholics Anonymous, during three different experiences - a stressful one, one that enticed them to drink, and a neutral, relaxing situation. The scientists compared their brain activity patterns to those of 30 social drinkers of similar age, intelligence and gender. The participants in the rehabilitation program were abstinent for four to eight weeks.

In order to generate the three experiences, the researchers asked all of the participants to describe recent stressful events, situations in which they ended up drinking, and circumstances that helped them to feel relaxed (such as sitting on a beach and listening to the waves). These were compiled into personalized two-minute videos that the team played back to the volunteers while they were brains were scanned using functional MRI. The scenarios induced the desired emotional states; heart rates rose during the stressful experiences and fell during the more relaxing ones.

But while the alcoholics appeared to be relaxed while picturing themselves on sunlit beaches, their brains - specifically the vmPFC - told a different story. “With relaxation, social drinkers relax their prefrontal cortex. It’s deactivation,” says Sinha, “For the alcoholic brain, what we found in this region was hyperactivity, as if it were stuck and primed and ready to go.” The alcoholics also showed elevated activity in an area linked with craving reward and pleasure even while they were relaxed.

Under stress, these regions also looked very different in the two groups. “[The stress response in] social drinkers goes up and responds as [it] needs to do when faced with a challenge: you want the system regulated to get ready for stress and to calm down afterwards. In the alcoholic brain, that [response] was flat or blunted,” Sinha says.

The discrepancy suggests that a more sensitive or active vmPFC could be making alcoholics vulnerable to drinking cues or to seeking out the satisfaction that comes from alcohol - a set-up for relapse. “The most important finding is the identification of a functional disruption in the brain that predicts who is most at risk for relapse,” Sinha says.