Marijuana's THC May Increase 'Noise' in Your Brain

Marijuana's main psychoactive compound, THC, may increase random neural activity — or neural noise — in the brain, according to a new study.

In the study, researchers gave THC to study participants through an IV, and found that the participants showed increased levels of random neural noise after the compound was administered. The participants also experienced a brief increase in such symptoms as having disorganized thoughts, and alterations in their perceptions of reality, the researchers found. These symptoms are associated with what researchers call psychosis — a condition that involves losing touch with the real word.

"At doses roughly equivalent to half or a single joint, [THC] produced psychosis-like effects and increased neural noise in humans,” senior study author Dr. Deepak Cyril D’Souza, a professor of psychiatry at Yale School of Medicine, said in a statement.

The new results suggest that the psychosis-like effects that...

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