Sleep is altered in a variety of mental disorders, both as a consequence of the illness and secondary to pharmacological treatment. Mania and anxiety disorders can lead to sleep decrease, whereas anergic depression and negative-symptoms schizophrenia can lead to increases in the duration of sleep. As one of the few objective parameters to be investigated during a psychiatric interview, sleep may be viewed as the "temperature" of the psychiatric clinical exam. The extreme phenotype of narcolepsy has led to the identification of a family of brain peptides called hypocretins as involved in sleep regulation. Another promising line of research is represented by clock genes. Clock genes regulate circadian rhythms, are highly conserved from plants to man  and may be molecular substrates mediating the interface of sleep and psychiatric syndromes.
Was this article helpful?
It seems like you hear it all the time from nearly every one you know I'm SO stressed out!? Pressures abound in this world today. Those pressures cause stress and anxiety, and often we are ill-equipped to deal with those stressors that trigger anxiety and other feelings that can make us sick. Literally, sick.