LI.1.22 & LI.1.24: Sleep-Wake Cycle (REM & N-REM)

What is the average duration of one cycle of NREM and REM sleep in adults?

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During which stage of NREM sleep are hallucinatory images, such as flashes of light and vivid images, most likely to occur?

• Stage 1
• Stage 2
• Stage 3
• Stage 4

Scenario: Jamie often wakes up feeling disoriented and unable to move for a few seconds. This happens during the early morning hours. Which stage of sleep is Jamie most likely experiencing this phenomenon?

• REM sleep
• Stage 3 NREM sleep
• Stage 4 NREM sleep
• Stage 2 NREM sleep

Scenario: Alex, a teenager, notices that they have a delayed sleep phase compared to their younger sibling. What theory explains this change?

• Restoration theory
• Evolutionary theory
• Circadian rhythm theory
• Sleep-wake shift theory

What are the primary differences between NREM and REM sleep?

• NREM sleep involves rapid eye movement, while REM does not
• REM sleep is a deeper sleep stage compared to NREM
• Dreaming occurs only during REM sleep
• NREM sleep is associated with physiological changes like increased heart rate

Which hormone is primarily responsible for regulating the sleep-wake cycle?

• Cortisol
• Adrenaline
• Melatonin
• Serotonin

What is the main characteristic of Stage 3 NREM sleep?

• Light sleep
• Dreaming
• Muscle relaxation
• Rapid eye movement

During which stage of sleep does dreaming primarily occur?

• Stage 1 NREM
• Stage 3 NREM
• REM sleep
• Stage 4 NREM

What is the term used to describe the 24-hour biological cycle in humans?

• Circadian rhythm
• Ultradian rhythm
• Infradian rhythm
• Homeostatic rhythm

Which stage of NREM sleep is known as 'deep sleep'?

• Stage 1
• Stage 2
• Stage 3
• Stage 4