Answer:
1. Stage 4 sleep.
2. Rapid eye movement (REM) sleep.
3. Stage 3 sleep.
4. Stage 1 sleep.
5. Stage 2 sleep.
6. Stage 4 sleep.
7. Rapid eye movement (REM) sleep.
Explanation:
Hypothalamus can be defined as a small portion of the mammalian brain responsible for the secretion of hormones through the stimulation of the pituitary gland.
It is located between the midbrain and the thalamus. Also, hypothalamus is the most inferior portion in the diencephalon of the forebrain.
Basically, hypothalamus is the most important portion of the brain in vertebrates that controls various bodily functions. The functions of the hypothalamus includes;
I. Responding to temperature change.
II. Evoking nausea when a person is anxious.
III. Regulating the release of thyroid stimulating hormone in the body.
IV. Regulating sleep and wakefulness in living organisms.
Sleep can be defined as a biological recurring state in which the mind and body of a living organism is characterized by altered (partial or total) consciousness, lessened sensory and muscular activities, as well as reduced physical interaction with the environment.
Matching the various stages of sleep with their description, we have;
1. Stage 4 sleep: the stage when vital signs (blood pressure, heart rate, and body temperature) reach their lowest normal levels.
2. Rapid eye movement (REM) sleep: indicated by movement of the eyes under the lids; dreaming occurs.
3. Stage 3 sleep : theta and delta waves begin to appear.
4. Stage 1 sleep: very easy to awaken; electroencephalogram (EEG) shows alpha waves; may even deny being asleep.
5. Stage 2 sleep: typified by sleep spindles.
6. Stage 4 sleep: the sleep cycle where bed-wetting, night terrors, and sleepwalking may occur.
7. Rapid eye movement (REM) sleep: may allow the brain to work through emotional problems in dream imagery.
