Increase in BMI (increased risk of obesity due to increased appetite).Increased risk of motor vehicle accidents.Ther affects of having too little sleep can include: Adults spend approx 20% of sleep in this stage compared to Infants who spend approx 50%.ĭement and Kleitman (1957) found that people report dreams when woken during REM so dreaming takes place during however others reported dreams when woken during NREM. REM sleep stimulates learning and an increase in proteins. Also, individuals experience sensory blockade which is when all incoming sensory information is stopped. Characteristics of this stage include: Irregular breathing, Eyes jerking, Movement inhibition (paralysed muscles), an increase in heart rate and blood pressure and dreaming. REM is the deepest stage of sleep and people spend approx. Can experience sleepwalking or night terrors. Heart and breathing rate continue to fall. Theta brainwaves slow down but bursts of brain activity. Stage 2Įye movements stop, Body temperature drops and heart rates slows. Sense of falling is common or sudden muscle jerk.Īlpha brain activity is resting and theta shows periods between wake and sleep. Muscles are less active, slow eye movements. Sleep and Dreaming: Why do we need to sleep and dream? What is sleep?Ī condition of body and mind which typically recurs for several hours every night, in which the nervous system is inactive, the eyes closed, the postural muscles relaxed, and consciousness practically suspended.
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