Sleep

4. The hypothesis concerning the clearance and removal of waste from the brain during sleep
6. Anxiety over sleep quality, a variation of insomnia caused by technology
7. Your body’s internal clock, which regulates regular bodily functions like the sleep schedule
9. A neurotransmitter that affects mood and motivation, kept balanced by good sleep
10. The cellular level where the "new science of sleep" explores connections
11. The hormone suppressed by blue-enriched light, signaling when it's time to sleep
13. The type of light from screens that confuses the circadian rhythm
15. One of the things connected to sleep, along with decreased adaptability to stimuli
16. The stage of sleep during which the brain undergoes "overnight therapy" and processes emotions
17. Acronym for the structured therapy that changes thought patterns and behaviors interfering with sleep
18. Threat Simulation Theory suggests dreaming is this type of function from an evolutionary perspective
20. A factor in busy lives that leads to burnout and has been linked to "Karoshi"

1. The brain's learning center where memory formation is hurt by lost sleep
2. The theory suggesting dreams rehearse threatening experiences, proposed by Revonsuo
3. Dreaming about threats strengthens the neural systems responsible for this against danger
5. The brain's emotional alarm center that becomes overactive after a sleepless night
8. A sleep disorder that doubles the risk of developing depression
12. The subarea of sleep science focusing on how brain networks create sleep rhythms
14. The part of the brain that organizes random signals into a coherent story during the Activation-Synthesis theory of dreams
19. A neurotransmitter, along with serotonin, that is balanced by sleeping well