https://scitechdaily.com/new-mri-stu...eakens-memory/
New MRI study reveals how cannabis alters brain activity and weakens memory.
quote:
Researchers analyzed over 1,000 young adults and found that both heavy lifetime use and recent cannabis consumption significantly reduced brain activity during working memory tasks. This impairment was linked to worse performance on tasks requiring focus, problem-solving, and instruction-following. Brain imaging revealed that key regions responsible for decision-making and attention were affected.