Both homeostatic and circadian sleep abnormalities are thought to play a role in bipolar disorder (Plante and Winkelman 2008).
Polysomnographic studies of unmedicated manic panics have found shortened total sleep time, shortened REM latency, and increased time awake in bed (Plante and Winkelman 2008).
**Harvey AG. Sleep and circadian rhythms in bipolar disorder: seeking synchrony, harmony, and regulation. Am J Psychiatry 2008;165(7):820-9.**
Harvey AG, Schmidt DA, Scarna A, Semler CN, Goodwin GM. Sleep-related functioning in euthymic patients with bipolar disorder, patients with insomnia, and subjects without sleep problems. Am J Psychiatry 2005;162(1):50-7.
Mehl RC, O’Brien LM, Jones JH, Dreisbach JK. Correlates of sleep and pediatric bipolar disorder. Sleep 2006;29(2):193-7.
**Plante DT, Winkelman JW. Sleep disturbance in bipolar disorder: therapeutic implications. Am J Psychiatry 2008;165(7):830-43.**
The above is excerpted from an article I wrote on Sleep Disorders and Mental Illness for Medlink Neurology.