The sleep cycle is divided into five stages:
•Stage 1 and 2 of the non-random eye movement has the following characteristics:
Conscious sleep.
The movement of the eye is slowly stopped.
Heart rate decreases.
•Stage 2 and 3 of the non-random eye movement is the deepest stage of sleep. In this, the delta wave is produced.
•REM or stage 5 is the only stage of random eye movement. In this, the movement of the eye occurs; slowly increase in blood pressure and irregular heart rate.
Further Explanation:
Sleep is a state of relaxation that is characterized by an inhibited sensory activity and state of consciousness. While sleeping, an individual goes through different stages of sleep. Sleep is divided into two stages, which are further divided into sub-stages. The two stages are:
REM (Random eye movement)
NREM (Non-random eye movement)
An individual moves through the sleep cycle at night four to five times. Each cycle takes around ninety minutes. Every stage of sleep provides a unique function, such as hormone regulation and muscle recovery. Without having a sleep of seven-eight hours, an individual is deprived of crucial elements that are required by the body to conquer the day.
NREM stage 1: This stage is also referred to as the transitional phase. In this stage, an individual is partially awakened and feeling drowsiness. In this stage, muscle and eye movement are slow down and the sensation of falling occurs.
NREM stage 2: This stage is the lightest stage of sleep. In this stage, the temperature of the body decrease and the heart rate is slow down. Also, the movement of the eye is stopped.NREM stage 3 and 4: In both the stage three and four deeper sleep has occurred because slow brain waves are named as delta waves. In this stage, an individual may experience night terrors and sleepwalk. As an individual goes through from three to four stages, the delta wave increases, and faster wave decreases. This stage is extremely rejuvenating and produces a hormone that helps in the growth of an individual. REM stage 5: It is referred to as random eye movement sleep. In this stage, eye dart in a different direction, but the muscle and limbs are temporarily paralyzed. This stage account twenty percent of sleep in adult and fifty percent of sleep in infants.
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Answer Details:
Grade: High School
Subject: Health
Topic: sleep cycle
Keywords:
NREM, REM, stage, sleep, deeper, delta waves, infants, falling, percent, sleepwalk, rejuvenating, paralyzed, muscle, eye.
