Lynn09, could your sleep be disrupted by the summer version of seasonal affective disorder?

Besides the obvious conditions, circadian rhythm is regulated by hormones and light.

Sleep has been a life long issue. In my teens, I developed non 24 hour circadian rhythm disorder. My 'body clock' is set to a 26 hour day rather than the standard 24. Every day or two my sleep times are pushed back about 2 hours, even if I go to bed at the same time as the previous night. In about 3 or 4 weeks I make my way around the clock.

This is chronic and difficult to treat. My sleep patterns dictate my life. It is not that bad right now, since I am attending university. My staggered class schedule makes it bearable. A job with set hours would be very difficult.

The changing seasons don't affect it at all.