Those in a manic state are more emotionally sensitive and show less inhibition about attitudes, which could create greater expression. Studies performed at Harvard looked into the amount of original thinking in solving creative tasks. Bipolar individuals, whose disorder was not severe, tended to show greater degrees of creativity".The relationship between depression and creativity appears to be especially strong among poets. See also
Personality disorder

References
Cited textsAmerican Psychiatric Association (2000). Diagnostic and statistical manual of mental disorders, Fourth Edition, Text Revision: DSM-IV-TR. Washington, DC: American Psychiatric Publishing, Inc. ISBN 978-0-89042-025-6. American Psychiatric Association (2013). Diagnostic and statistical manual of mental disorders, Fifth Edition, Text Revision: DSM-5. Washington, DC: American Psychiatric Association, Inc. ISBN 978-0-89042-554-1. Carlson, Neil R.; Heth, C. Donald (2007). Psychology the science of behaviour (4th ed.). Pearson Education Inc. ISBN 978-0-205-64524-4. Collier, Judith; Longmore, Murray (2003). "4". In Scally, Peter (ed.). Oxford Handbook of Clinical Specialties (6th ed.). Oxford University Press. ISBN 978-0-19-852518-9. Nesse, Randolphe M.; Williams, George C. (1994). Why We Get Sick: The New Science of Darwinian Medicine. Vintage Books. ISBN 0-8129-2224-7. Nolen-Hoeksema, S (2013). Abnormal Psychology (6th ed.). McGraw-Hill Higher Education. ISBN 9780077499693. Retrieved 5 December 2014. Parker, Gordon; Hadzi-Pavlovic, Dusan; Eyers, Kerrie (1996). Melancholia: A disorder of movement and mood: a phenomenological and neurobiological review. Cambridge: Cambridge University Press. ISBN 978-0-521-47275-3. Sadock, Benjamin J.; Sadock, Virginia A. (2002). Kaplan and Sadocks Synopsis of Psychiatry: Behavioral Sciences/Clinical Psychiatry (9th ed.). Lippincott Williams & Wilkins. ISBN 978-0-7817-3183-6. Semple, David; Smyth, Roger; Burns, Jonathan; Darjee, Rajan; McIntosh, Andrew (2007) [2005]. "13". Oxford Handbook of Psychiatry.
As with alcohol, the effects of benzodiazepine on neurochemistry, such as decreased levels of serotonin and norepinephrine, are believed to be responsible for the increased depression. Additionally, benzodiazepines can indirectly worsen mood by worsening sleep (i.e., benzodiazepine-induced sleep disorder). Like alcohol, benzodiazepines can put people to sleep but, while asleep, they disrupt sleep architecture: decreasing sleep time, delaying time to REM sleep, and decreasing deep sleep (the most restorative part of sleep for both energy and mood). Just as some antidepressants can cause or worsen anxiety in some patients due to being activating, benzodiazepines can cause or worsen depression due to being a central nervous system depressant—worsening thinking, concentration and problem solving (i.e., benzodiazepine-induced neurocognitive disorder). However, unlike antidepressants, in which the activating effects usually improve with continued treatment, benzodiazepine-induced depression is unlikely to improve until after stopping the medication.In a long-term follow-up study of patients dependent on benzodiazepines, it was found that 10 people (20%) had taken drug overdoses while on chronic benzodiazepine medication despite only two people ever having had any pre-existing depressive disorder. A year after a gradual withdrawal program, no patients had taken any further overdoses.Just as with intoxication and chronic use, benzodiazepine withdrawal can also cause depression. While benzodiazepine-induced depressive disorder may be exacerbated immediately after discontinuation of benzodiazepines, evidence suggests that mood significantly improves after the acute withdrawal period to levels better than during use. Depression resulting from withdrawal from benzodiazepines usually subsides after a few months but in some cases may persist for 6–12 months.