Sleep & Child Development
Children especially need to sleep well as several essential bodily restorative changes occur during slumber. Inadequate sleep can result in height challenged, obese, unhealthy children prone to frequent infections and poor academic performance Adequate and restful sleep is critically important to physical and mental well-being. While sleep is the body’s time to recover from the day’s activities, recharge and get ready for the next day, it is also the time when your body heals and repairs heart and blood vessels and crucial brain development occurs. In children, inadequate sleep results in poor growth and fatigue which makes them vulnerable to viral and other infections. Stages of sleep Sleep is defined as “a naturally occurring reversible blissful state of suspended animation when consciousness is absent”. As we fall asleep, we experience three stages of non-REM (Rapid Eye Movement) sleep, each lasting 10-15 minutes. During this period the sleep is light, the person is rousable, but the heart rate slows and body temperature drops. Around an hour and a half later, REM sleep occurs, when the eyes move rapidly in different directions. The first cycle of REM lasts around 10 minutes. The non-REM-REM cycles repeat several times during the night. The length of REM sleep gets progressively longer and may last an hour or so. Dreams occur during this time. Infants spend 50 percent of their time in REM sleep. This progressively declines to 20 percent in adults. How much sleep does a child need? • Infants (upto two years) need 11-14 hours of sleep • Preschoolers (two to six years) 10-13 hours • Six to 13-year-olds: Nine to 11 hours • Teenagers: Eight-ten hours (Adults (above 18) need a minimum seven to nine hours) If all this is added together, we effectively spend a third of our lifetimes asleep. It may seem like a waste of precious productive hours, but several essential body restorative changes occur during slumber. For instance the space between the brain cells increases during sleep. This boosts the flow of cerebrospinal fluid between the cells and flushes out toxins. The growth hormone, which stimulates height growth, is secreted during sleep. Chronic sleep deprivation can result in children not realising their full height potential. Also, when children participate in physical activity, transmitter chemicals in the brain get depleted. This causes fatigue. These chemicals are replenished during sleep. Infection-fighting T cells in the blood are also formed during sleep. These remove the inflammation-causing cytokine chemicals from the blood. That’s why sleep-deprived children are more susceptible to viral and bacterial infections and take a longer time to recover. Infants naturally get the sleep they require. But school-going children often have a plethora of reasons to stay awake and fight ‘wasteful’ sleep. There’s the temptation to watch television or play games on electronic gadgets late into nights. Sleep deprivation consequences Adults who are sleep-deprived become drowsy and may nod off at inopportune moments. Children react more sharply to sleep deprivation — they become irritable, hyperactive, and throw temper…
