Why Do Animals Sleep? | Vlad Vyazovskiy | 202

Send us a text Short Summary: A deep dive into the enigmatic world of sleep, exploring its biological functions, evolutionary origins, and the diverse manifestations across different species. Note: Podcast episodes are fully available to paid subscribers on the M&M Substack and on YouTube. Partial versions are available elsewhere. About the Guest: Vlad Vyazovskiy, PhD is a Professor of Sleep Physiology at the Department of Physiology, Anatomy, and Genetics at Oxford University. Key Takeaways:Sleep as a Mystery: Despite extensive research, the fundamental reason why animals sleep remains elusive, with no comprehensive theory yet agreed upon.Local Sleep Phenomenon: Sleep might not be a whole-brain event; even within a sleeping brain, different areas can be in different states of activity or rest.Sleep in Animals: Sleep varies widely among species, from micro-sleeps in penguins to unihemispheric sleep in dolphins, suggesting sleep could serve multiple, context-dependent functions.Synaptic Homeostasis: The hypothesis suggests that sleep could be crucial for renormalizing synaptic connections formed during wakefulness, although this idea is still under scrutiny.Hibernation & Torpor: These states relate to sleep but involve significant metabolic changes, possibly acting as survival mechanisms by conserving energy and reducing detectability by predators.Psychedelics & Sleep: Research shows psychedelics like 5-MeO-DMT can induce states where animals show signs of sleep in their brain activity while physically active, hinting at complex interactions between brain states and consciousness. Related episodes:M&M #43: Sleep, Dreaming, Deep Neural Networks, Machine Learning & Artificial Intelligence, Overfitted Brain Hypothesis, Evolution of Fiction & Art | Erik HoelM&M #16: Sleep, Dreams, Memory & the Brain | Bob Stickgold *Not medical advice. Support the show All episodes (audio & video), show notes, transcripts, and more at the M&M Substack Affiliates: MASA Chips—delicious tortilla chips made from organic corn and grass-fed beef tallow. No seed oils or artificial ingredients. Use code MIND for 20% off. Lumen device to optimize your metabolism for weight loss or athletic performance. Use code MIND for 10% off. Athletic Greens: Comprehensive & convenient daily nutrition. Free 1-year supply of vitamin D with purchase. KetoCitra—Ketone body BHB + potassium, calcium & magnesium, formulated with kidney health in mind. Use code MIND20 for 20% off any subscription. Learn all the ways you can support my efforts