Cannabis Alters Brain Activity During Sleep, Study Reveals

WHO:

The Washington Post - Larry Mitchell, a cannabis user who experienced changes in his dream patterns.

WHAT:

The Washington Post - Cannabis use has been reported to alter brain activity during sleep, leading to a reduction in dream recall.

The Washington Post - After quitting cannabis, Larry Mitchell experienced a return of vivid dreams.

WHEN:

The Washington Post - Larry Mitchell quit smoking cannabis last summer.

WHY:

The Washington Post - The study suggests that cannabis may suppress REM sleep, which is the sleep stage associated with dreaming.

HOW:

The Washington Post - The alteration in brain activity during sleep due to cannabis use is linked to its effects on REM sleep cycles.

(UPDATED July 23, 2026 14:46 UTC)

A recent report from The Washington Post highlights the experiences of Larry Mitchell, a cannabis user who noticed significant changes in his dream patterns. After quitting cannabis last summer, he found that his vivid dreams returned, suggesting that cannabis may suppress REM sleep, the stage associated with dreaming. This alteration in brain activity during sleep is linked to the effects of cannabis on REM sleep cycles, leading to a reduction in dream recall.