Prediction of outcome after rectus femoris surgery in cerebral palsy: The role of cocontraction of the rectus femoris and vastus lateralis

Henry Chambers, Anna Lisa Lauer, Kenton Kaufman, J. Marc Cardelia, David Sutherland

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

Rectus femoris surgery was performed on 70 patients with cerebral palsy and stiff-knee gait. Fifty-three patients underwent distal rectus transfer, and 17 patients had distal rectus release with complete muscle mobilization. Gait analysis was performed preoperatively and postoperatively at a minimum of 1 year. Swing-phase peak knee flexion (PKF) was improved in the transfer group, allowing improved foot clearance and more efficient gait (p = 0.04). PKF in swing deteriorated slightly in the release group (p = 0.04). The presence of abnormal swing-phase electromyogram (EMG) activity in the rectus alone or abnormal combined rectus and vastus lateralis activity did not influence the PKF results in either surgery (p > 0.05). The Ely test had no predictive value in identifying patients with abnormal EMG activity (p > 0.05). Preoperative knee range of motion was not a significant variable in determining relative success of rectus surgery. No deleterious effects were observed in stance phase in either group (p > 0.05).

Original languageEnglish (US)
Pages (from-to)703-711
Number of pages9
JournalJournal of Pediatric Orthopaedics
Volume18
Issue number6
DOIs
StatePublished - Nov 1 1998

Keywords

  • Cerebral palsy
  • Electromyography
  • Gait analysis
  • Rectus femoris
  • Stiff-knee gait

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Orthopedics and Sports Medicine

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