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Psychedelics change blood-flow signals in brain imaging — Level A1 — a colorful fireworks display in the dark

Psychedelics change blood-flow signals in brain imagingCEFR A1

15 Dec 2025

LevelA1
A2
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Adapted from Washington U. in St. Louis, Futurity • CC BY 4.0

Photo by BoliviaInteligente, Unsplash

Level A1 – Beginner
2 min
80 words
  • Scientists study a psychedelic drug for mood and addiction.
  • The drug can change how the brain works.
  • Blood flow in the brain is a common scan signal.
  • Researchers gave the drug to mice and watched effects.
  • Neural firing no longer matched blood flow after dosing.
  • A second medicine blocked a receptor and fixed blood flow.
  • They tested another psychedelic and saw similar changes.
  • Human brain scans showed similar blood-flow changes too.
  • This result matters for doctors using brain scans.

Difficult words

  • psychedelic — drug that changes perception and feelings
  • blood flow — movement of blood through the brain
    blood-flow
  • neural firing — electrical activity from brain cells
  • receptor — a protein on cells that binds molecules
  • addiction — strong need to keep using a substance
  • scan — medical images of the inside of the body
    scans

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Have you ever had a medical scan?
  • Would you take medicine to change mood?
  • Do you think brain scans are useful for doctors?

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