Lecture 19 – Sleep & Dreams

These flashcards cover essential vocabulary and concepts related to sleep and dreams, ideal for reviewing prior to the exam.

Circadian Rhythms

Natural, internal processes that regulate the sleep-wake cycle and repeat roughly every 24 hours.

Sleep Hygiene

Behavioral and environmental practices that promote better sleep quality and overall health.

Sleep Apnea

A sleep disorder characterized by pauses in breathing during sleep that can significantly impact health.

NREM Sleep

Non-Rapid Eye Movement sleep, consisting of stages N1, N2, and N3/4, where the body undergoes restorative processes.

REM Sleep

Rapid Eye Movement sleep, a stage characterized by increased brain activity and dream occurrence.

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles by promoting sleep during the dark.

Hypnagogic Hallucinations

Sensation of falling or seeing imaginary images that can occur in the transitional state from wakefulness to sleep.

Sleep Cycle

The progression through various stages of sleep (wake, N1, N2, N3/4, REM) that occurs multiple times a night.

Sleep Deprivation

Lack of adequate sleep, which can result in negative physical and cognitive health outcomes.