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New Study Reveals Harmful Effects of Dim Light Exposure During Sleep

sleeping room

Story at-a-glance -

  • Exposure to very dim light during sleep — even if it does not noticeably impair your sleep — may affect your brain function and cognition during the day
  • Sleeping under 10 lux light conditions decreased activation in a brain region involved in response inhibition, attentional control and the detection of relevant cues when performing a task the following day
  • Animal research found that nighttime exposure to 5 lux for three weeks in a row produced depression-like symptoms and impaired cognition

By Dr. Mercola

Inside the suprachiasmatic nucleus (SCN) of your brain, which is part of your hypothalamus, resides your master biological clock. Based on signals of light and darkness, your SCN tells your pineal gland when it's time to secrete melatonin, and when to turn it off.


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