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The present review focuses on sleep disorders and the results of polysomnographic studies performed in patients with ET. For this purpose we performed a systematic review crossing the search term \u201cessential tremor\u201d with \u201csleep,\u201d \u201csleep disorders,\u201d \u201csleep disturbances\u201d and \u201cpolysomnography,\u201d and with specific sleep disorders, according to the International Classification of the Sleep Disorders\u2014Third Edition, using the PubMed, EMBASE, MEDLINE, and Web of Science Databases. The most frequent sleep problems reported by patients with ET were the bad quality of sleep and excessive daytime somnolence (the latter could be related to drugs commonly used for the treatment of ET). Probable rapid eye movement sleep behavior disorder, coexistent restless legs syndrome, insomnia, and nocturia were not infrequent complaints, while the presence of other sleep disorders in patients with ET was restricted to anecdotal reports or not described. Meta-analyses of previous reports showed that patients with ET (according to the PRISMA and MOOSE guidelines) showed higher scores in the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale than controls and lower scores than those of patients diagnosed with Parkinson\u2019s disease. Studies using polysomnography in patients with ET are scarce and do not permit to establish valid conclusions regarding polysomnographic features in this disorder.<\/jats:p>","DOI":"10.1093\/sleep\/zsaa039","type":"journal-article","created":{"date-parts":[[2020,3,12]],"date-time":"2020-03-12T18:27:25Z","timestamp":1584037645000},"source":"Crossref","is-referenced-by-count":23,"title":["Sleep disorders in essential tremor: systematic review and meta-analysis"],"prefix":"10.1093","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7558-7323","authenticated-orcid":false,"given":"F\u00e9lix Javier","family":"Jim\u00e9nez-Jim\u00e9nez","sequence":"first","affiliation":[{"name":"Section of Neurology, Hospital Universitario del Sureste, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hortensia","family":"Alonso-Navarro","sequence":"additional","affiliation":[{"name":"Section of Neurology, Hospital Universitario del Sureste, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elena","family":"Garc\u00eda-Mart\u00edn","sequence":"additional","affiliation":[{"name":"University Institute of Molecular Pathology Biomarkers, UNEx. ARADyAL Instituto de Salud Carlos III, C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 A G","family":"Ag\u00fandez","sequence":"additional","affiliation":[{"name":"University Institute of Molecular Pathology Biomarkers, UNEx. 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