Temporal characteristics of lower extremity moment generation in children with cerebral palsy

Andrea L. Downing, Kathleen J. Ganley, Deanne R. Fay, James J. Abbas

Research output: Contribution to journalArticle

12 Scopus citations


Lower extremity weakness has been documented in children with cerebral palsy (CP). However, the temporal characteristics of moment generation have not been characterized, and they may be important to function. This study tested ankle, knee, and hip flexion and extension moment generation capabilities in children with CP and in able-bodied children. Maximum voluntary isometric contractions (MVIC), the maximum rates of moment development and relaxation, and the time to produce and reduce the moments were quantified. Relationships between the temporal measures, Gross Motor Function Measure-66 (GMFM-66), and MVICs were also examined. Children with CP had significantly reduced MVICs, maximum development, and relaxation rates, and increased times to produce and reduce moments. The maximum rates of moment development and relaxation at some joints were correlated with the GMFM-66 and MVICs. These results suggest that both the magnitude and temporal characteristics of moment generation need to be targeted during therapeutic interventions for children with CP.

Original languageEnglish (US)
Pages (from-to)800-809
Number of pages10
JournalMuscle and Nerve
Issue number6
StatePublished - Jun 2009



  • Cerebral palsy
  • Impairments
  • Joint moment
  • Lower extremity
  • Weakness

ASJC Scopus subject areas

  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)
  • Physiology

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