Morning headaches affect about one person in 13 in the general population and are associated with depression and anxiety disorders, according to an article in the January 12 issue of The Archives of Internal Medicine, one of the JAMA/Archives journals.
According to the article, waking up with a headache is traditionally associated with sleep disorders. Studies have reported a high association between morning headache and obstructive sleep apnea syndrome, and snoring. The prevalence of morning headache in the general population is not known, although according to a Swedish study, 5 percent of the population often experiences morning headache.
Maurice M. Ohayon, M.D., D.Sc., Ph.D., of Stanford University School of Medicine, Palo Alto, Calif., investigated the prevalence of chronic morning headaches (CMH) in the general population, and their relationship to sociodemographic characteristics, controlled substance use, and clinical, sleep and mental disorders.
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Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
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