Text Size
Smaller
Bigger
Depression

Overnight TV or Computer Monitor Light Increases Risk of Depression

posted 10:00 PM EST, Mon July 30, 2012
-- filed under: | |

Sleeping while exposed to low levels of artificial light, like from a TV or computer screen in a darkened room, likely increases your risk of depression, as well as obesity and certain cancers.

Researchers say overnight exposure to low levels of artificial light – like from a TV or computer monitor in a darkened room – likely increases your risk for depression.

And even staying up late at the computer or in front of the TV might elevate your odds of the disorder.

The Study

Researchers at Ohio State University separated a group of female hamsters into two study groups.

  1. The first group lived in an environment with 16 hours of full light and 8 hours of darkness
  2. The second group lived with 16 hours of full light and 8 hours of dim light – equivalent to the light emitted from a TV in a darkened room or the ambient overnight light level of a major city

After 4 weeks, all hamsters were tested for animal measures of depression:

  • Appetite for sugar and willingness to swim when placed in water
  • Neurochemical measures

The Results

  • Hamsters exposed to dim overnight lighting had less appetite for sugar water and were less willing to swim for survival when placed in water.
  • The brains of the hamsters exposed to dim light showed evidence of inflammation (which is strongly associated with depression) a reduction in the release of melatonin and a reduction in the numbers of dendritic spines in the hippocampus.
  • Symptoms of depression in the dim light group were reversed after 2 weeks of sleeping again in full darkness.

Commentary

The researchers say that rising rates of depression over the last 50 years may be partly attributable to the huge increase in overnight light exposure over that same period.

But the good news, according to doctoral student and lead researcher Tracy Bedrosian,is that "people who stay up late in front of the television and computer may be able to undo some of the harmful effects just by going back to a regular light-dark cycle and minimizing their exposure to artificial light at night."

Read the full study results in Molecular Psychiatry.

Email It Send this page Print It Print friendly page Subscribe Subscribe to this topic category
Story Highlights
  • Artificial Overnight Light and Depression: Sleeping exposed to diffuse artificial light may increase your risk of depression
  • Easily Reversed: Research suggests that you can reverse the depression inducing effects of overnight artificial lights by darkening your sleeping environment
Creative Commons License
Copyright Notice
We welcome republishing of our content on condition that you credit Choose Help and the respective authors. This article is licensed under a Creative Commons License.

Join Thousands of Readers

who receive our weekly recovery newsletter.

Call Now for
Rehab Options
Insurance Accepted
(Except Medicare)
Helpful Information
Overcoming Depression: Feeling Good Again with Mindfulness
Mindfulness and Depression: Learning to Feel Good Again © Premasagar
How Mindfulness can overcome depression, teach us how to ignore unwanted thoughts and help us choose what is healthy for ourselves. Read Article
Depression Treatment July 07, 2015 (1)
Use Gut Bacteria to Fight Anxiety and Depression
Gut Bacteria Protect Your Mental Health. Learn How to Protect Your Microbiome © NIAID
Imbalanced gut bacteria may increase your risk of anxiety, depression, obesity and a host of other diseases. Learn how digestive bacteria can cause anxiety and find out how dietary changes can help you instill or protect an optimal balance of beneficial bacteria. Read Article
Co-Occurring Disorders May 26, 2016
Dealing with Depression and Chronic Pain Learn how opioids can lead to depression, how depression worsens pain and what to do when you have both pain and depression. Read Article
Pain & Opioid Issues April 07, 2015
Like Our Site? Follow Us!

This website is certified by Health On the Net Foundation. Click to verify. This site complies with the HONcode standard for trustworthy health information:
verify here.