Module 23: Sleep Patterns and Sleep Theories

Question 1

What is the biological clock; regular bodily rhythms (for example, of temperature and wakefulness) that occur on a 24-hour cycle?

Answer 1

Circadian Rhythm

Question 2

What is the rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur. The muscles are relaxed (except for minor twitches) but other body systems are active?

Answer 2

REM sleep

Question 3

What is REM sleep also known as?

Answer 3

Paradoxical sleep

Question 4

What are the relatively slow brain waves of a relaxed, awake state?

Answer 4

Alpha waves

Question 5

What is the periodic, natural loss of consciousness—as distinct from unconsciousness resulting from a coma, general anesthesia, or hibernation?

Answer 5

Sleep

Question 6

What are false sensory experiences, such as seeing something in the absence of an external visual stimulus.?

Answer 6

Hallucinations

Question 7

What are the large, slow brain waves associated with deep sleep?

Answer 7

Delta waves

Question 8

What is non–rapid eye movement sleep; that encompasses all sleep stages except for REM sleep?

Answer 8

NREM sleep

Question 9

What is the pair of cell clusters in the hypothalamus that controls circadian rhythm? In response to light, it causes the pineal gland to adjust melatonin production, thus modifying our feelings of sleepiness.

Answer 9

Suprachiasmatic nucleus (SCN)

Question 10

Which part of the sleep cycle do dreams mostly occur in?

Answer 10

REM stage

Question 11

We cycle through four distinct sleep stages about every how many minute?

Answer 11

90 minutes