Gayle Greene, the author of the book Insomniac, describes the physical consequences of insomnia.
Over the last few years I have inquired more aggressively into people's sleep patterns because I find that many of the symptoms they complain about that have been diagnosed as depression and anxiety disorders are related to their poor sleep.
There is a chicken and egg phenomenon in the sense that is the poor sleep a symptom of depression or is the depression a symptom of poor sleep.
Americans as compared to people from other cultures get about 1 hour per day less sleep.
Video lasts 3:24.