Why You Forget Your Dreams (Your Brain Deletes Them on Purpose)

You dream almost every night — so why is it gone by breakfast? Your brain might be deleting your dreams on purpose. In this video: • Why REM sleep is a busy brain with the "save" button switched off (noradrenaline goes quiet) • The 2019 discovery of MCH neurons that help the brain forget during REM sleep • Why some people remember dreams almost every morning (about 2 minutes awake seems to be the key) • A 2025 study of 217 people: daydreamers, light sleep, age, and even winter • "White dreams", and 4 simple steps to remember more of your dreams Subscribe to SyV Explains for short, beautifully animated explanations of how your mind works. CHAPTERS 0:00 You were flying 0:15 Why do dreams slip away? 0:22 Your brain in REM sleep 0:32 The "save it" chemical switches off 0:51 The 2019 forgetting neurons 1:13 Your brain taking out the trash 1:19 Why some people remember 1:34 The 2025 study of 217 people 1:54 White dreams 2:01 How to remember more 2:14 What will you keep? SOURCES • Izawa S. et al. (2019). REM sleep–active MCH neurons are involved in forgetting hippocampus-dependent memories. Science, 365(6459), 1308–1313. https://doi.org/10.1126/science.aax9238 • Vallat R. et al. (2017). Increased evoked potentials to arousing auditory stimuli during sleep: implication for the understanding of dream recall. Frontiers in Human Neuroscience, 11:132. https://doi.org/10.3389/fnhum.2017.00132 • Bernardi G. and colleagues, IMT School for Advanced Studies Lucca (2025). The individual determinants of morning dream recall. Communications Psychology. https://doi.org/10.1038/s44271-025-00... • Aston-Jones G. & Bloom F. E. (1981). Activity of norepinephrine-containing locus coeruleus neurons in behaving rats anticipates fluctuations in the sleep-waking cycle. Journal of Neuroscience, 1(8), 876–886. Visuals were created with AI image tools (ChatGPT / OpenAI image models) and animated by SyV Explains. Voice and music: ElevenLabs. This video is for education and is not medical advice. #dreams #sleep #neuroscience