Sunday, 21 November 2010

Sleeping with light on 'can cause depression'

People who like to sleep with the light on may think twice as it could lead to depression, according to new research.
Light at night, even from a TV, causes changes in the brain linked to depressive disorders, scientists revealed.
Female Siberian hamsters exposed to dim light every night for eight weeks showed significant changes in a part of the brain called the hippocampus. ‘Even dim light at night is sufficient to provoke depressive-like behaviours in hamsters, which may be explained by the changes we saw in their brains after eight weeks of exposure,’ said Tracy Bedrosian, co-author of the study by Ohio State University.
‘The hippocampus plays a key role in depressive disorders, so finding changes there is significant.’
The night-time light used in the study was not bright – the equivalent of having a television on in a darkened room.
Read the full article here

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