Medicine: Capsules, Dec. 27, 1971

> Smoking marijuana is frequently called a mind-blowing experience, and that description may be more than a metaphor. A team of British researchers has reported in the Lancet that ten habitual marijuana users were found to be suffering from cerebral atrophy, or irreversible shrinkage of the brain tissue. The patients, all between 18 and 28, were under treatment for various neurological symptoms and drug abuse. Using a special X-ray technique to measure the volume of the patient's brain tissue, the physicians found all ten to have significant atrophy, a condition frequently found in...

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