Hypersomnia: Symptoms, causes &amp; treatment. Cleveland Clinic. (n.d.). Retrieved January 4, 2023, from https://my.clevelandclinic.org/health/diseases/21591-hypersomnia#symptoms-and-causes 

University of Texas at Austin

Although the causes of Hypersomnia are not clear yet, scientists are currently studying the roles of various neurotransmitters (specifically hypocretin/orexin, dopamine, histamine, serotonin and gamma-aminobutyric acid) in the brain and spinal cord. Genetic ties are also being currently studied as family history is present in up to 39% of people with idiopathic hypersomnia. The impact of the genes associated with the circadian rhythm are also being studied (genes that may be different for those that have idiopathic hypersomnia).

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