Genetically engineered mouse models with Alzheimer's-like symptoms that were given synthetic tetrahydrocannabinol for six weeks had reduced loss of brain cells and 20% less Alzheimer's-related brain plaque than those who received placebo and had similar memory test performance as mice without Alzheimer's, according to a study presented at the Society for Neuroscience annual meeting. The findings indicate that THC may benefit Alzheimer's patients, but other rodent studies presented at the meeting showed that prenatal, adolescent and adult exposure to THC resulted in impaired thinking and memory.
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