Sleep Stages

During this stage of sleep, you drift in and out of sleep and can be easily awakened.

• Stage 1

• Stage 2

• Stage 3

• Stage 4

During this stage of sleep, muscle activity and eye movements completely stop, and you become difficult to awaken.

• Stage 1

• Stage 2

• Stage 3

• Stage 4

There are ______ stages of non REM sleep.

• 1

• 2

• 3

• 4

How many stages of sleep does a person go through each night?

• 2
• 3
• 4
• 5

REM stands for

• Rapid eye movement
• Rapid eye motion
• Rage eye movement
• Random eye movement

Sleep is usually measured in cycles of:

• 30 minutes

• 60 minutes

• 90 minutes

• 120 minutes

This stage of sleep is considered deep sleep and has almost exclusively delta waves.

• 1
• 2
• 4
• 5

This stage of sleep is considered light sleep and the individual may feel as if they are falling.

• 1
• 2
• 3
• 4

REM stands for

• Rapid eye movement
• Rapid eye motion
• Rage eye movement
• Random eye movement

REM sleep is also known as paradoxical sleep because:

• Measures of the brain activity closely resemble waking consciousness, but the person is incapable of moving.
• Measures of the brain activity closely resemble waking consciousness, but the person is in the deepest stage of sleep.
• The person’s heart rate is slower than when awake, but the person can sleepwalk or sleep talk.
• The person’s vital signs are very slow, but the person can get up and walk around.