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Clinical and preclinical studies have implicated serotonin (5-HT) and the 5-HT2A receptor (5-HT2AR) in the pathogenesis of medication-overuse headache (MOH). However, with no appropriate animal model to study this phenomenon it is difficult to differentiate the effects of chronic exposure to analgesics from the consequences of frequent headache attacks(More)
Neuromyelitis optica spectrum disorder (NMOSD) is an inflammatory central nervous system syndrome, and encephalitis associated with anti-N-methyl-d-aspartate receptor (NMDAR) antibodies is an autoimmune encephalopathy. A patient with both diseases, separately or simultaneously, is rare as a clinical phenomenon, but cannot be ignored. We report the clinical(More)
BACKGROUND Laughing is a rare precipitating factor for headaches, and the pathogenesis underlying laugh-induced headache (LH) remains unclear. METHODS Two cases of headache triggered predominantly by laughing were presented in this article. We also reviewed the published English literature regarding LH, summarized the clinical characteristics of LH, and(More)
Background Preclinical experimental studies revealed an acute alteration of pituitary adenylate cyclase-activating polypeptide in response to a single activation of the trigeminovascular system, which suggests a potential role of pituitary adenylate cyclase-activating polypeptide in the pathogenesis of migraine. However, changes in pituitary adenylate(More)
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