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Synergistic muscle activation during maximum voluntary contractions in children with and without spastic cerebral

Kristina Tedroff1, Loretta M Knutson, Gary L Soderberg

  • 1Neuropaediatric Unit, Department of Woman and Child Health, Karolinska Institutet, Stockholm, Sweden. kristina.tedroff@ki.se

Developmental Medicine and Child Neurology
|September 19, 2006
PubMed

Insights

Children with cerebral palsy (CP) exhibit distinct lower extremity muscle recruitment patterns during maximal voluntary contractions compared to typically developing children. These differences in muscle activation may inform new therapeutic strategies for motor control retraining.

Area of Science:

  • Neurology
  • Biomedical Engineering
  • Rehabilitation Science

Background:

  • Cerebral palsy (CP) affects motor function, impacting muscle coordination.
  • Understanding muscle recruitment is crucial for effective rehabilitation strategies.

Purpose of the Study:

  • To investigate and compare lower extremity (LE) muscle recruitment patterns in children with CP versus typically developing children.
  • To identify differences in voluntary muscle activation during maximum voluntary contractions.

Main Methods:

  • Surface electromyography (sEMG) was used to record activity from four proximal and distal LE muscles.
  • Participants included children with diplegic CP, hemiplegic CP, and a control group of typically developing children.
  • Muscle recruitment patterns were analyzed during maximal voluntary contractions.

Main Results:

  • Children with CP demonstrated altered muscle recruitment compared to controls.
  • CP groups more frequently activated non-prime mover muscles, particularly distal muscles.
  • Specific examples include tibialis anterior preactivation in hemiplegic CP during plantar flexion and hamstring coactivation in diplegic CP.

Conclusions:

  • Significant differences exist in voluntary LE muscle activation patterns between children with CP and typically developing children.
  • Altered muscle recruitment in CP suggests potential motor control deficits.
  • Further research into these patterns can guide the development of targeted motor control retraining and interventions.

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