Stages of Sleep

This set of flashcards covers key concepts related to the stages of sleep, including characteristics, effects, and physiological changes.

What are the characteristics of Stage 1 sleep?

High and mixed frequency, low amplitude.

What type of waves are associated with Stage 3 sleep?

Lower frequency, high amplitude delta waves.

How long does a full cycle of sleep stages take?

Approximately 90-120 minutes.

What percentage of the night's sleep is typically REM sleep?

About 25% of the night's sleep.

How does deep sleep distribution change throughout the night?

More deep sleep occurs early, with longer bouts of REM sleep later.

What happens to the body's physiological activity during early stages of sleep, particularly stage 3?

The body relaxes, and EEG activity, heart rate, and breathing all slow.

What is the significance of REM sleep in terms of muscle activity?

Many muscles are paralyzed, preventing sleepwalking.

How are dreams during REM sleep characterized?

Dreams are more vivid, long-lasting, and detailed.

What happens to REM sleep as we age?

We have more trouble sleeping through the night and get less REM sleep.

What are some effects of sleep deprivation?

Cognitive and motor impairment, difficulty concentrating, irritability, moodiness, and increased risk of depression.