🧠 Tu CEREBRO inventa mundos cada noche… y aún no sabemos por qué

Ciencias de la Ciencia

Ciencias de la Ciencia

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What happens in your brain when you dream? Why does the body become almost immobile during REM sleep? Can someone respond from within a lucid dream?

In this episode, we explore the architecture of sleep, the NREM and REM phases, muscle atonia, and the mechanisms that allow the brain to construct experiences while reducing its conscious response to the environment. We distinguish between sleepwalking, night terrors, nightmares, sleep paralysis, and REM sleep behavior disorder.

We also review the discovery of REM sleep, the eye signals of lucid dreams, and the 2021 experiment that achieved limited two-way communication with sleeping individuals. We explain why dream memories tend to fade, what we know about sleep, memory, and emotion, and why theories about the function of dreaming remain open.

⏳ VIDEO SUMMARY:

0:00 The brain invents worlds while you sleep
3:04 The architecture of sleep: NREM and REM
4:13 How REM sleep was discovered
6:01 Atonia: why the body inhibits itself
7:31 Sleepwalking, nightmares, terrors, and REM sleep behavior disorder
9:48 Sleep paralysis and the sense of presence
11:24 Dreaming is not suffering from psychosis
13:11 The first communication from a lucid dream
16:01 The dialogue with dreamers achieved in 2021
17:21 Why we forget almost all our dreams
18:40 What is the purpose of sleep and what do we know about dreaming?
21:32 The major theories about dreams
24:07 What would happen if we eliminated REM sleep?

26:45 What Science Knows and What It Still Doesn't Know
27:31 Dreams, Pseudoscience, and Conclusion

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🔬 REFERENCES:

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Crick, F., & Mitchison, G. (1983). The function of dream sleep. Nature, 304, 111–114. https://doi.org/10.1038/304111a0

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Marzano, C., Ferrara, M., Mauro, F., et al. (2011). Recalling and forgetting dreams: Theta and alpha oscillations during sleep predict subsequent dream recall. Journal of Neuroscience, 31(18), 6674–6683. https://doi.org/10.1523/JNEUROSCI.041...

van der Helm, E., Yao, J., Dutt, S., Rao, V., Saletin, J. M., & Walker, M. P. (2011). REM sleep depotentiates amygdala activity to previous emotional experiences. Current Biology, 21(23), 2029–2032. https://doi.org/10.1016/j.cub.2011.10...

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Postuma, R. B., Iranzo, A., Hu, M., et al. (2019). Risk and predictors of dementia and parkinsonism in idiopathic REM sleep behavior disorder: A multicenter study. Brain, 142(3), 744–759. https://doi.org/10.1093/brain/awz030

Konkoly, K. R., Appel, K., Chabani, E., et al. (2021). Real-time dialogue between experimenters and dreamers during REM sleep. Current Biology, 31(7), 1417–1427.e6. https://doi.org/10.1016/j.cub.2021.01...

Hoel, E. (2021). The overfitted brain: Dreams evolved to assist generalization. Patterns, 2(5), 100244. https://doi.org/10.1016/j.patter.2021...

Eichenlaub et al. (2018). Incorporation of recent waking-life experiences in dreams correlates with frontal theta in REM sleep. SCAN, 13(6), 637–647. https://doi.org/10.1093/scan/nsy041

#Dreams #Brain #Neuroscience #Science