Hipersomniya, normal fizyolojik bir durum olan yorgunluk ile karıştırılmamalıdır.[4] Gündüz uykusu en çok az etkileşimin gerekli olduğu durumlarda ortaya çıkar.[5]
^Reynolds (2013). "DSM-5 Sleep-Wake Disorders Classification: Overview for Use in Clinical Practice". The American Journal of Psychiatry. 170 (10): 1099-1101. doi:10.1176/appi.ajp.2013.13010058. PMID24084814. The aim is simply to acknowledge the bidirectional and interactive effects between sleep disorders and coexisting medical and psychiatric illnesses.
^"Sleep Disorders". American Psychiatric Association. 2015. 13 Ocak 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 12 Ocak 2017.
^Grossman, A., Barenboim, E., Azaria, B., Sherer, Y., & Goldstein, L. (2004). The maintenance of wakefulness test as a predictor of alertness in aircrew members with idiopathic hypersomnia. Aviation, space, and environmental medicine, 75(3), 281–283.
^Wise, M. S., Arand, D. L., Auger, R. R., Brooks, S. N., & Watson, N. F. (2007). Treatment of narcolepsy and other hypersomnias of central origin. Sleep, 30(12), 1712–1727.