Mgbanwe ụra
Mgbanwe ụra ma ọ bụ mgbagwoju na ụdị nke ụwa họrọ site n'ime ụmụ gị anya ụra bụ mgbanwe nke omume ihi ụra. Ndị na-enwe ụra-mbilite n'anya na-agbanwere omume ehihie maka omume abalị, nke pụtara na ha na-arụsi ọrụ ike n'abalị ma na-ehi ụra n'ehihie. Mgbanwe n'ụra, mgbe ọ na-enweghị isi, nwere ike ịbụ ihe ịrịba ama nke nnukwu nsogbu.

Nkwupụta 
Ndị na-arịa ụdị ụra na-egbu oge nke nsogbu ahụ na-egosipụtakarị oge ụra na enweghị ike ịgbanwe oge ụra ha mgbe niile. Ha na-egosipụtakarị ụra n'oge ha chọrọ. Oge ochie nakwa n'oge kwesịrị dị ụra ha n'ezie dị mma. Ozugbo ha na-ehi ụra, ha na-anọ na-ebili ruo oge kwesịrị dị n'al ekwesị, ọ bụ ezie na oge nke na-amalite ma na-akwụsị n'oge na-adịghị mma.

Ihe Ndị Na-akpata ya 
Mgbanwe ụra nwere ike ịbụ mgbaàmà nke ọkwa ammonia dị elu n'ọbara ma na-abụkarị mgbaàmà mbụ nke ọrịa imeju. Mgbanwe ụra bụ ihe na-egosi trypanosomiasis nke Afrịka, mgbe nke ahụ gasịrị, ọrịa ahụ na-ewere aha ya, "ọrịa ụra nke Afrịka na ụdị nke ụwa họrọ"; nsogbu ụra-mbilite n'ọnwụ bụ ihe na'ahụkarị na ọrịa ahụ eruola ebe ọrịa ahụ gbasara n'ime usoro akwara etiti.

Hụkwa 

 Jet lag
 Nsogbu ihi ụra na-arụ ọrụ
 Ụda circadian
 Nsogbu ụra na-egbu oge
 Encephalitis na-adịghị ike
 Egwu Egwu

Ntụaka

Njikọ mpụga 

 American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 4th mbipụta, ederede e dezigharịrị. [Ihe e dere n'ala ala peeji]
 Buysse, Daniel J., Charles M. Morin, na Charles F. Reynolds nke Atọ. Nsogbu ihi ụra. Na Treatments of Psychiatric Disorders, nke Glen O. Gabbard dezigharịrị. mbipụta nke abụọ. [Ihe e dere n'ala ala peeji]
 Hobson, J. Allan, na Rosalia Silvestri. "Ụra na nsogbu ya. Na The Harvard Guide to Psychiatry, nke Armand M. Nicholi, Jr., M.D. Cambridge, MA: Belknap Press nke Harvard University Press, dezigharịrị, 1999.
 Thorpy, Michael J., M.D., na Jan Yager, Ph.D.The Encyclopedia of Sleep and Sleep Disorders. mbipụta nke abụọ. New York: Facts on File, 2001.
 American Sleep Disorders Association 6301 Bandel Road NW, Suite 101, Rochester, MN 55901.
 http://www.minddisorders.com/Br-Del/Circadian-rhythm-sleep-disorder.html#ixzz3tkBVLE9P