{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,16]],"date-time":"2026-06-16T03:38:01Z","timestamp":1781581081458,"version":"3.54.5"},"reference-count":23,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2011,6,8]],"date-time":"2011-06-08T00:00:00Z","timestamp":1307491200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Movement Disorders"],"published-print":{"date-parts":[[2011,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Essential tremor is the most common movement disorder, typically characterized by the presence of both postural and kinetic tremor of the hand. In recent studies, we described the effects of altering force and load conditions on tremor amplitude and power in people with essential tremor. In the same participants, we also measured tremor\u2010related functional disability. In this article we report on the current study on correlations of measures of tremor severity with those of tremor\u2010related functional disability. Twenty\u2010one participants with essential tremor had tremor measured in their more tremorous hand. Power spectral and amplitude measures of tremor were calculated for each of 16 conditions: force tremor at 4 submaximal force levels, postural tremor in unloaded and 3 submaximal load conditions, and kinetic tremor in unloaded and 3 submaximal load conditions for each of concentric and eccentric contractions of the wrist extensors. Participants were rated on the hand items of the Fahn\u2010Tolosa\u2010Marin rating scale and timed on the unilateral hand tasks of the Test \u00c9valuant la Performance des Membres sup\u00e9rieurs des Personnes \u00c2g\u00e9es. The most consistently high and significant correlations were found between kinetic tremor measures and the hand task scores and tremor\u2010B scores (<jats:italic>r<\/jats:italic> = 0.548\u20130.780, <jats:italic>P<\/jats:italic> &lt; .01). Postural tremor measures correlated with disability measures only in loaded conditions, most consistently with the hand task measures (<jats:italic>r<\/jats:italic> = 0.640\u20130.725, <jats:italic>P<\/jats:italic> &lt; .01). Thus, measures of kinetic tremor and loaded postural tremor, but not unloaded postural tremor or force tremor, relate well to disability captured with dynamic tasks. \u00a9 2011 Movement Disorder Society<\/jats:p>","DOI":"10.1002\/mds.23811","type":"journal-article","created":{"date-parts":[[2011,6,8]],"date-time":"2011-06-08T10:33:54Z","timestamp":1307529234000},"page":"2088-2094","source":"Crossref","is-referenced-by-count":12,"title":["Tremor during movement correlates well with disability in people with essential tremor"],"prefix":"10.1002","volume":"26","author":[{"given":"Kathleen E.","family":"Norman","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shauna N.","family":"D'Amboise","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giovanna","family":"Pari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin E.","family":"H\u00e9roux","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2011,6,8]]},"reference":[{"issue":"3","key":"e_1_2_7_2_2","first-page":"2","article-title":"Ad Hoc Scientific Committee. 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