Sleep

Question 1

What is REM sleep?

Answer 1

Rapid eye movement sleep where vivid dreams occur and muscles are relaxed while the body system is active

Also known as paradoxical sleep.

Question 2

What characterizes NREM 1 sleep?

Answer 2

Nonrapid eye movement sleep where a person is awake and lightly asleep, characterized by theta waves

This stage is typically brief.

Question 3

What happens during NREM 2 sleep?

Answer 3

Transition between light sleep and deep sleep, includes sleep spindles indicating bursts of brain activity

People typically enter and exit deep sleep from this stage twice.

Question 4

What is NREM 3 sleep known for?

Answer 4

Deep sleep that includes sleepwalking and replenishes the brain and body, characterized by delta waves

It is essential for restorative processes.

Question 5

What are alpha waves?

Answer 5

Slow brain waves associated with an awake, relaxed state

These waves are not primarily associated with sleep stages.

Question 6

What are delta waves?

Answer 6

Large, slow brain waves that are part of NREM 3 sleep

They indicate deep sleep activity.

Question 7

What is the order of sleep stages?

Answer 7

NREM 1 -> NREM 2 -> NREM 3 -> REM

You fluctuate between NREM 2 and REM sleep.

Question 8

What is the role of the super chiasmatic nucleus (SCN)?

Answer 8

Controls the circadian rhythm and adjusts melatonin production in the pineal gland in response to light changes

Located in the hypothalamus.

Question 9

Define circadian rhythm.

Answer 9

Regular body rhythms that follow a 24-hour and 11-minute cycle

These rhythms regulate sleep-wake cycles and other physiological processes.

Question 10

What is the activation synthesis theory?

Answer 10

Theory that dreams result from random brain activity being interpreted and synthesized into meaningful experiences

This theory emphasizes the brain’s role in creating narratives from spontaneous neural firing.