{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T19:10:05Z","timestamp":1792005005733,"version":"4.4.0"},"reference-count":35,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2006,1,1]],"date-time":"2006-01-01T00:00:00Z","timestamp":1136073600000},"content-version":"vor","delay-in-days":426,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2004,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>To answer the question whether the muscle contracture in patients with cerebral palsy is caused by overstretching of in\u2010series sarcomeres we studied the active and passive force\u2013length relationship of the flexor carpi ulnaris muscle (FCU) in relation to its operating length range in 14 such patients with a flexion deformity of the wrist.<\/jats:p><jats:p>Force\u2013length relationship was measured intra\u2010operatively using electrical stimulation, a force transducer, and a data\u2010acquisition system. Muscle length was measured in maximally flexed and maximally extended position of the wrist.<\/jats:p><jats:p>The spastic FCU was found to exert over 80% of its maximum active force at maximal extension of the wrist and this indicates abundant overlap of the sarcomeres. At maximal wrist extension, FCU passive force corresponded with only 0.7\u201318% of maximum active force. Both findings imply that the FCU sarcomeres are not overstretched when the wrist is extended. We conclude that the overstretching of in\u2010series sarcomeres appears not to be the cause of contracture of the spastic FCU. \u00a9 2004 Orthopaedic Research Society. Published y Elsevier Ltd. All rights reserved.<\/jats:p>","DOI":"10.1016\/j.orthres.2004.04.006","type":"journal-article","created":{"date-parts":[[2004,6,11]],"date-time":"2004-06-11T20:16:34Z","timestamp":1086984994000},"page":"1331-1335","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["Overstretching of sarcomeres may not cause cerebral palsy muscle contracture"],"prefix":"10.1002","volume":"22","author":[{"given":"Mark J. C.","family":"Smeulders","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michiel","family":"Kreulen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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