{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T10:18:21Z","timestamp":1780568301308,"version":"3.54.1"},"reference-count":10,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2023,12,9]],"date-time":"2023-12-09T00:00:00Z","timestamp":1702080000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["movementdisorders.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Movement Disord Clin Pract"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Five cases of tremor only upon smiling have been reported where no facial tremor is present at rest, when talking, or with full smile.<\/jats:p><\/jats:sec><jats:sec><jats:title>Cases<\/jats:title><jats:p>This report highlights four cases of tremor upon partial smiling, discusses the phenomenology of smiling tremor, and reviews the current literature. Four subjects with lower facial tremor present only upon smiling underwent movement disorders evaluation with video. Tremor frequencies were determined by parsing the video clips into 1\u2010second intervals and averaging the number of oscillations per interval and were determined to be high\u2010frequency 8 to 10\u2009Hz irregular facial tremors with harmonic variations upon moderate effort in all cases. Slight or full\u2010effort smiling did not elicit facial muscle oscillations. Subjects had no other signs of tremor, dystonia, or parkinsonism on examination or in family history.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Tremor upon smiling only, or isolated smiling tremor, is a unique task\u2010 and position\u2010specific tremor of the facial musculature.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mdc3.13938","type":"journal-article","created":{"date-parts":[[2023,11,25]],"date-time":"2023-11-25T05:54:30Z","timestamp":1700891670000},"page":"171-174","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["A Case Series of Isolated Smiling Tremor: What Is the Phenomenology?"],"prefix":"10.1002","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9275-5341","authenticated-orcid":false,"given":"Sara","family":"Radmard","sequence":"first","affiliation":[{"name":"Department of Neurology, Division of Movement Disorders Albany Medical Center  Albany New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian Johannes","family":"Amlang","sequence":"additional","affiliation":[{"name":"Department of Neurology, Division of Movement Disorders Columbia University Irving Medical Center  New York City New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Louis","family":"Weimer","sequence":"additional","affiliation":[{"name":"Department of Neurology, Division of Neuromuscular Columbia University Irving Medical Center  New York City New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seth L.","family":"Pullman","sequence":"additional","affiliation":[{"name":"Department of Neurology, Division of Movement Disorders Columbia University Irving Medical Center  New York City New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,12,9]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.21776"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10439-016-1765-5"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1136\/jnnp.50.4.489"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.22666"},{"issue":"14","key":"e_1_2_7_6_1","article-title":"Tremor on smiling","volume":"84","author":"Kalra D","year":"2015","journal-title":"Neurology"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.26815\/acn.2019.00241"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.1063"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.neulet.2017.01.016"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.27121"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40734-016-0035-x"}],"container-title":["Movement Disorders Clinical Practice"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/movementdisorders.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/mdc3.13938","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T10:29:43Z","timestamp":1760956183000},"score":1,"resource":{"primary":{"URL":"https:\/\/movementdisorders.onlinelibrary.wiley.com\/doi\/10.1002\/mdc3.13938"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,12,9]]},"references-count":10,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2024,2]]}},"alternative-id":["10.1002\/mdc3.13938"],"URL":"https:\/\/doi.org\/10.1002\/mdc3.13938","archive":["Portico"],"relation":{},"ISSN":["2330-1619","2330-1619"],"issn-type":[{"value":"2330-1619","type":"print"},{"value":"2330-1619","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,12,9]]},"assertion":[{"value":"2023-08-25","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-11-12","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-12-09","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}