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Electronics in the Bedroom: Why it’s Necessary to Turn Off Before You Tuck In

Let’s face it –electronics are a part of life in the 21st century. Pros and cons to our increasing connectivity certainly exist; we are able to stay engaged with the world from the privacy of our own homes late into the evening. However, in doing so we are exposed to the light that our devices emit; and both mental activity and light exposure promote wakefulness.

Living in our 24/7 society, there is a loss of the evening reduction in light that has traditionally cued our brains to “wind down” for sleep.

Experts Helene Emsellem, MD and Taylor Bos, BA, give us a review of what the latest literature says around electronics and the impact on sleep, highlighting how the use of electronic devices in the bedroom further disrupts the natural pattern of the sleep-wake cycle.

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Electronics, Light and the Science of Sleep

There is robust scientific data documenting the role of light in promoting wakefulness. Photoreceptors in the retina sense light and dark, signaling our brain about the status of the outside world and aligning our circadian rhythms (centered in a small region of the hypothalamus called the suprachiasmatic nucleus) to the external day-night cycle. This signaling of light and dark helps us to be alert in the morning and be able to fall asleep at the appropriate time at night. The power of light as an alerting agent is easily conceptualized when we think of the sun, but may be more difficult to appreciate when considering the light emitted from a tablet or smartphone.

Nonetheless, careful studies have shown that even our small electronic devices emit sufficient light to miscue the brain and promote wakefulness. As adults we are subject to these influences and our children are particularly susceptible.

Children, Electronics and Sleep

The increasing prevalence of electronics in children’s bedrooms creates a culture of evening engagement and light exposure that negatively impacts sleep time, sleep quality and daytime alertness. Literature shows that:

  • Children using electronic media as a sleep aid to relax at night have been shown to have later weekday bedtimes, experience fewer hours of sleep per week and report more daytime sleepiness.
  • Adolescents with a bedroom television have later bedtimes, more difficulty initiating sleep and shorter total sleep times.
  • Texting and emailing after lights outs, even once per week, dramatically increases self-reported daytime sleepiness among teens.
  • Not all electronic usage is recreational as the burden of homework is great for many of our children and their work is often completed on the computer, a significant light source late in the evening. 
  • Increased academic demands, busy social and extracurricular schedules and the lure of entertainment conspire to keep our children electronically engaged at night.

Many children are not fulfilling basic sleep requirements and adequate sleep is essential for growth, learning, mood, creativity and weight control.  Understanding the influence of light and evening engagement on sleep is the first step in helping parents address the dilemma of electronics in the bedroom. 

 

Citations:

  1. Figueiro M, Bierman A, Plitnick B, Rea M. Preliminary evidence that both blue and red light can induce alertness at night. BMC Neuroscience 2009;10(1):105.
  2. Eggermont S, Van den Bulck J. Nodding off or switching off? The use of popular media as a sleep aid in secondary-school children. J Paediatr Child Health 2006;42(7-8):428-433.
  3. Shochat T, Flint-Bretler O, Tzischinsky O. Sleep patterns, electronic media exposure and daytime sleep-related behaviours among Israeli adolescents. Acta Paediatr 2010;99(9):1396-1400.
  4. Van den Bulck J. Adolescent use of mobile phones for calling and for sending text messages after lights out: results from a prospective cohort study with a one-year follow-up. Sleep 2007;30(9):1220-3.

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Electronics in the Bedroom: Why it’s Necessary to Turn Off Before You Tuck In

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