Decades after it was discovered, scientists might have finally figured out how LSD interacts with our body. As part of the study, a research team administered the psychedelic drug to 25 volunteers while scanning their brains. An intriguing finding was that the LSD allowed more information to flow from the thalamus, the part of the brain that serves as an information filter, to other parts of the brain. The discovery could play a major role in future research on psychiatric disorders and potentially help develop new medicines.