The Mind Trivia
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Wander inward with trivia on the mind, covering neuroscience, sleep science, dream interpretation, consciousness, and the neuroscience of addiction. Why we dream, how we focus, and what makes us aware remain some of science's most tantalizing mysteries. Tune into your inner world and see how well you know the thing doing the knowing.
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This stage of rest produces sawtooth waves on an EEG and features your most vivid nocturnal experiences, yet your skeletal muscles remain paralyzed.
- REM sleep
- Stage 2 sleep
- Stage 3 sleep
- Stage 1 sleep
This hormone, produced by the pineal gland when darkness falls, signals your body that nighttime has arrived and helps regulate your internal clock.
- Melatonin
- Cortisol
- Serotonin
- Dopamine
The typical adult cycles through all stages of rest approximately four to six times per night, with each complete cycle lasting about this many minutes.
- 45 minutes
- 90 minutes
- 120 minutes
- 60 minutes
When someone repeatedly stops breathing during rest due to throat muscles relaxing and blocking the airway, they suffer from this common disorder.
- Obstructive sleep apnea
- Central sleep apnea
- Restless leg syndrome
- Narcolepsy
This stimulant blocks adenosine receptors in the brain, which is why consuming it in the afternoon can make falling asleep at night more difficult.
- Nicotine
- Caffeine
- Alcohol
- Sugar
Blue wavelengths of light are especially effective at suppressing this hormone, which is why screen use before bed can delay your body's readiness for rest.
- Melatonin
- Growth hormone
- Cortisol
- Prolactin
Most adults require between seven and nine hours of nightly rest, but this age group needs significantly more—typically fourteen to seventeen hours daily.
- Toddlers
- School-age children
- Newborns
- Teenagers
This deepest stage of rest, also called slow-wave rest, is when your body releases growth hormone and performs most of its physical restoration.
- Stage 1
- Stage 2
- REM
- Stage 3
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