:the stage when vital signs (blood pressure, heart rate, and body temperature) reach their lowest normal levels. 2. rem: indicated by movement of the eyes under the lids; dreaming occurs. 3. : theta and delta waves begin to appear. 4. nrem stage 1: very easy to awaken; eeg shows alpha waves; may even deny being asleep. 5. nrem stage 2: typified by sleep spindles. 6. : begins about 90 minutes after the onset of sleep. 7. rem: may allow the brain to work through emotional problems in dream imagery.

1. Answer;

NREM-Stage 4

Is the stage when vital signs (blood pressure, heart rate, and body temperature) reach their lowest normal levels.

Explanation;

-During stage 4 of NREM, deep sleep continues as the brain produces delta waves almost exclusively. People roused from this state feel disoriented for a few minutes.

2. Answer;

NREM-Stage 3

Theta and delta waves begin to appear.

Explanation;

-In this stage of NREM, there is extremely slow brain waves called delta waves are interspersed with smaller, faster waves. This is deep sleep. It is during this stage that a person may experience sleepwalking, night terrors, talking during one’s sleep, and bedwetting. These behaviors are known as parasomnias, and tend to occur during the transitions between non-REM and REM sleep.

3. Answer;

NREM-Stage 1

Very easy to awaken; EEG shows alpha waves; may even deny being asleep.

Explanation;

It is the light sleep where you drift in and out of sleep and can be awakened easily. In this stage, the eyes move slowly and muscle activity slows. During this stage, many people experience sudden muscle contractions preceded by a sensation of falling.

4. Answer;

NREM-Stage 2

Typified by sleep spindles.

Explanation;

-In this stage of NREM, the eye movement stops and brain waves become slower with only an occasional burst of rapid brain waves. The body begins to prepare for deep sleep, as the body temperature begins to drop and the heart rates slows.

5. Answer;

REM

-Indicated by movement of the eyes under the lids; dreaming occurs

-Begins about 90 minutes after the onset of sleep.

-Necessary for emotional health; may be neural ʺdebugging.ʺ

-May allow the brain to work through emotional problems in dream imagery.

-During REM (rapid eye movement) sleep, brain waves resembles activity during the waking state. The eyes remain closed but move rapidly from side-to-side, perhaps related to the intense dream and brain activity that occurs during this stage.

sadness is not good

explanation: