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It continues to occur in developing countries although resurgence is being reported from developed countries. Characteristic features include progressive neuropsychiatric issues, myoclonus, seizures, movement disorders and visual impairment. Electroencephalography (EEG) typically shows periodic generalized discharges, and elevated CSF anti\u2010measles antibodies are diagnostic. Movement disorders are being increasingly recognized as part of the clinical spectrum, and range from hyperkinetic (chorea, dystonia, tremor, tics) to hypokinetic (parkinsonism) disorders and ataxia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p>This article aims to comprehensively review the spectrum of movement disorders associated with SSPE.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A literature search was conducted in PubMed and EMBASE databases in December 2023 and articles were identified for review.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Movement disorders reported in SSPE included hyperkinetic (chorea, dystonia, tremor and tics), hypokinetic (parkinsonism), ataxia and extraocular movement disorders. Myoclonus, a core clinical feature, was the most frequent \u201cabnormal movement.\u201d Movement disorders were observed in all clinical stages, and could also be a presenting feature, even sans myoclonus. Hyperkinetic movement disorders were more common than hypokinetic movement disorders. An evolution of movement disorders was observed, with ataxia, chorea and dystonia occurring earlier, and parkinsonism later in the disease. Neuroradiological correlates of movement disorders remained unclear.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>A wide spectrum of movement disorders was observed throughout the clinical stages of SSPE. Most data were derived from case reports and small case series. Multicentric longitudinal studies are required to better delineate the spectrum and evolution of movement disorders in SSPE.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mdc3.14062","type":"journal-article","created":{"date-parts":[[2024,5,15]],"date-time":"2024-05-15T13:59:21Z","timestamp":1715781561000},"page":"770-785","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Movement Disorders in Patients with Subacute Sclerosing Panencephalitis: A Systematic Review"],"prefix":"10.1002","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0532-3370","authenticated-orcid":false,"given":"Divyani","family":"Garg","sequence":"first","affiliation":[{"name":"Department of Neurology All India Institute of Medical Sciences  New Delhi India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2951-9223","authenticated-orcid":false,"given":"Sahil","family":"Patel","sequence":"additional","affiliation":[{"name":"Department of Neurology P. 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