Changes in brain gray matter in abstinent heroin addicts

English: Middle frontal gyrus. 日本語: 中前頭回。前頭葉にあ...

English: Middle frontal gyrus. (Photo credit: Wikipedia)

A few years ago, Bill White called for research on the neurobiology of recovery. (He noted that all of our research efforts have been focused on understanding addiction without any research on understanding recovery.)

Well, some Chinese researchers have made a contribution. Good news for heroin addicts.

Background

Previous neuroimaging studies have documented changes in the brain of heroin addicts. However, few researches have detailed whether such changes can be amended after short-term abstinence.

Methods

We used magnetic resonance imaging (MRI) to investigate gray matter volume in 20 heroin-dependent patients at 3 days and at 1 month after heroin abstinence; 20 normal subjects were also included as controls.

Results

Decreased gray matter density in frontal cortex, cingulate and the occipital regions were found in heroin users after three days of abstinence. In contrast, after 1-month abstinence, no significant difference was found in superior frontal gyrus between heroin addicts and controls, but changes in other brain regions, including right middle frontal gyrus, left cingulate gyrus and left inferior occipital gyrus, still remained.

Conclusion

Our findings illustrate that abnormal gray matter in some brain regions of heroin addicts can return to normal after one-month abstinence.

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