What happens in Stage 1 of sleep?
Stage 1 is essentially the “dozing off” stage, and it normally lasts just one to five minutes. During N1 sleep, the body hasn’t fully relaxed, though the body and brain activities start to slow with periods of brief movements (twitches).
What are the stages of sleep in psychology?
Sleep has been traditionally divided into 4 categories: awake, light, deep, and REM sleep. Each one plays an essential role in maintaining your mental and physical health. Note: As you’re reading about sleep, you may also see the terms “NREM” or “Stages 1-4.” These are simply other terms for the phases of sleep.
What is the 1st stage of sleep is called?
Stage 1. The first stage of sleep, known as light stage sleep, is one of the shortest, lasting five to ten minutes on average. In this stage, the mind and body begin to ‘slow down,’ causing us to feel drowsy and relaxed.
What happens during stage 1 sleep psychology quizlet?
Stage 1 can be considered a transition period between wakefulness and sleep. In Stage 1, the brain produces high amplitude theta waves, which are very slow brain waves. This period of sleep lasts only a brief time (around 5-10 minutes).
What happens in stage 2 of sleep?
Stage 2 of non-REM sleep This is the stage where you are actually fully asleep and not aware of your surroundings. During stage 2, the heart rate and breathing regulate, the body temperature goes down, the eye movements either slow or stop completely.
What are the stages of sleep psychology quizlet?
Terms in this set (5)
- Stage 1: -Light sleep~ Theta sleep (4-7 CPS) -Hypnic jerk.
- Stage 2: -Light sleep, theta waves (4-7 CPS) -slightly deeper stage of sleep.
- Stage 3: -Deep sleep, Delta waves (less than 4 CPS)
- Stage 4: -Purely delta waves (close to 1 CPS) -the deepest stage of sleep.
- Stage 5: -Rapid Eye Movement.
What are the characteristics of Stage 1 sleep quizlet?
Stage 1 is when the sleeper may experience a hypnic jerk. Hypnic jerks are quite common in stage 1. Approximately 5-10 minutes. EEG pattern shows a decrease in ALPHA WAVE production as these brain waves are replaced by more irregular, medium frequency, THETA WAVES, which have a mixture of high and low amplitude.
What is Stage 2 of sleep called?
Stage 2: You are in light sleep. Your heart rate slows and your body temperature drops. Your body is getting ready for deep sleep. This can last for 10-25 minutes. Stages 3: This is the deep sleep stage.
What wave is characteristic of stage 1 sleep?
alpha waves
In terms of brain wave activity, stage 1 sleep is associated with both alpha and theta waves. The early portion of stage 1 sleep produces alpha waves, which are relatively low frequency (8–13Hz), high amplitude patterns of electrical activity (waves) that become synchronized ([link]).
What happens during stage 1 sleep quizlet respiration?
Terms in this set (11) What occurs during stage 1 sleep? Both our respiration and heartbeat slow down.
What happens in stage 3 of sleep?
During this stage, your muscles become more relaxed and you may begin to have slow-wave (delta) brain activity. Stage N3 is deep sleep and lasts about 20 to 40 minutes. During this stage, delta brain activity increases and a person may have some body movements. It is very hard to wake up someone in stage N3.
What happens in stage 4 of sleep?
By stage 4, the brain produces delta waves almost exclusively. It is very difficult to wake someone during stages 3 and 4, which together are called deep sleep. There is no eye movement or muscle activity. Some children experience bedwetting, night terrors, or sleepwalking during deep sleep.
What are the different stages of sleep actually mean?
Let’s take a closer look at all of them, starting with the non-REM group: Stage 1: the lightest form of sleep, kind of a transition between being awake and falling asleep. During this stage, you can drift off and wake up multiple times. Stage 2: the next stage of light sleep. At this point, your eyes stop moving, heart rate slows down a bit, and the body temperature decreases too. Stages 3 and 4: the deep sleep.
What is Stage 1 NREM sleep?
Stage 1 (NREM1 or N1) is the stage between wakefulness and sleep , sometimes referred to as somnolence or drowsy sleep , in which the muscles are still quite active and the eyes roll around slowly and may open and close from time to time.
What are the five stages of sleep?
Stage 1 is a light sleep. Typically,there are rolling eye movements,less blinking,and a gradual decrease in muscle tension.