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Sleep Is Defined By Disconnection
- Sleep is marked by a loss of awareness of the external environment and internal states.
- Dragana Rogulja emphasizes that this disconnection, not mere rest, defines sleep.
Sleep Predates Complex Brains
- Simple animals like jellyfish and hydra exhibit sleep-like disconnection and reduced responsiveness.
- Dragana Rogulja argues this shows sleep is ancient and widespread across animal life.
Sleep Is A Whole-Body Phenomenon
- Sleep regulation and benefits extend beyond the brain to other body tissues and signals.
- Dragana Rogulja notes that signals from other body parts can both regulate and benefit sleep.