If your child is cranky or stressed, cut texting.

Tammy Jones knew something was wrong when she found herself struggling to wake her son Casey, 17, for school and found him cranky, stressed and in a bad mood when he ultimately did get up. The Rowlett, Texas, mom, 39, got a clue to the source of the problem when he sent her a text late at night, long after he was supposed to be asleep, thinking he was texting someone else. She quickly texted back, “Casey, this is your mother. Go to bed.” Fifty-six percent of teens, ages 13-18, bring their cellphones into their bedrooms and use them, with texting especially popular in the hour before trying to go to sleep, according to the 2011 Sleep in America Poll from the National Sleep Foundation. The mission of the nonprofit, based in Washington DC, is to alert the public, health care providers and policymakers to the importance of adequate sleep. The study noted a correlation between those who text in the hour before trying to go to sleep at least a few nights a week, with 51 percent less likely to report getting a good night’s sleep, 65 percent more likely to wake up feeling unrefreshed, 17 percent more likely to be categorized as sleepy during the day and 63 percent more likely to drive drowsy. That doesn’t surprise Dr Kara Starnes, a pediatrician with Texas Health Presbyterian Hospital of Allen. “One of the first questions I ask parents of adolescents is: Do they have any questions about their child’s sleep or sleepiness in class? If they do, the answer I usually get is that they’re texting all night.” A lack of sleep can have immense repercussions for children, she says. It can affect their reasoning ability, causing them to do poorly on tests and impairing their judgment in social situations. It can even affect their physical growth as the growth hormone secretes mostly and sometimes only when a child sleeps. Plus, it’s not uncommon for a child to be assessed by schools and parents as having attention-deficit hyperactivity disorder and find the symptoms go away after the child is put on a sleep routine, she says. It’s important to rule out lack of sleep before settling on this diagnosis because ADHD medications are stimulants that can exacerbate sleep problems. In addition to the problem of texting when a child should be sleeping, the act of looking at screens right before bed can make sleeping more difficult, according to John Herman, Ph.D., associate director of the Sleeping Disorders Clinic at Children’s Medical Center. The pineal gland is a small endocrine gland in the brain that begins to secrete melatonin, a hormone that helps regulate sleep and wake cycles, two hours before the onset of sleep. That secretion can be impaired by moderate light emitted by cellphones, computers and television screens, explains Herman, also a professor of psychiatry and pediatrics at the University of Texas Southwestern Medical Center. In fact, the more screens in a child’s bedroom, the more sleep problems the child is likely to have, he says. From: Kuwait times