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Brief (&lt; 50 ms) myoclonic electromyographic discharges showed a time\u2010locked relationship to a focal premovement electroencephalographic potential. Somatosensoryevoked potentials were not enlarged and long\u2010latency reflexes were not grossly exaggerated. This pattern of electrophysiological findings can be distinguished from those previously found in other parkinsonian syndromes. These results provide evidence for a cortical origin of the myoclonus seen in these patients.<\/jats:p>","DOI":"10.1002\/mds.870130327","type":"journal-article","created":{"date-parts":[[2005,5,28]],"date-time":"2005-05-28T20:42:04Z","timestamp":1117312924000},"page":"540-544","source":"Crossref","is-referenced-by-count":27,"title":["Cortical myoclonus in levodopa\u2010responsive parkinsonism"],"prefix":"10.1002","volume":"13","author":[{"given":"John N.","family":"Caviness","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charles H.","family":"Adler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephanie","family":"Newman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard J.","family":"Caselli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manfred D.","family":"Muenter","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2004,11,4]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0025-6196(11)63006-1"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1001\/archneur.1975.00490470075011"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.38.10.1520"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1136\/jnnp.48.6.506"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/117.4.835"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/117.5.1197"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1097\/00002826-198604000-00013"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/115.6.1875"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/108.1.193"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.410340213"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/mds.870110409"},{"key":"e_1_2_1_13_2","first-page":"395","volume-title":"Neuropsychological Assessment","author":"Lezak MD.","year":"1988"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1097\/00004691-199104000-00007"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/mus.880110902"},{"key":"e_1_2_1_16_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.40.10.1561"},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.42.6.1142"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.47.5.1113"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1001\/archneur.1993.00540020018011"},{"key":"e_1_2_1_20_2","first-page":"239","article-title":"Receptor changes in the neocortex of post\u2010mortem tissue in Parkinson's disease and Alzheimer's disease","volume":"3","author":"Griffiths PD","year":"1992","journal-title":"Dementia"}],"container-title":["Movement Disorders"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fmds.870130327","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/movementdisorders.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/mds.870130327","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T14:48:26Z","timestamp":1760971706000},"score":1,"resource":{"primary":{"URL":"https:\/\/movementdisorders.onlinelibrary.wiley.com\/doi\/10.1002\/mds.870130327"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1998,5]]},"references-count":19,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1998,5]]}},"alternative-id":["10.1002\/mds.870130327"],"URL":"https:\/\/doi.org\/10.1002\/mds.870130327","archive":["Portico"],"relation":{},"ISSN":["0885-3185","1531-8257"],"issn-type":[{"value":"0885-3185","type":"print"},{"value":"1531-8257","type":"electronic"}],"subject":[],"published":{"date-parts":[[1998,5]]}}}