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Pediatr Phys Ther. 2013 Fall;25(3):278-89. doi: 10.1097/PEP.0b013e31828dc3b6.

Muscle activation patterns in infants with myelomeningocele stepping on a treadmill.

Author information

  • 1Developmental Neuromotor Control Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, Michigan 48109, USA. jksansom@umich.edu

Abstract

PURPOSE:

To characterize how infants with myelomeningocele (MMC) activate lower limb muscles over the first year of life, without practice, while stepping on a motorized treadmill.

METHODS:

Twelve infants with MMC were tested longitudinally at 1, 6, and 12 months. Electromyography was used to collect data from the tibialis anterior, lateral gastrocnemius, rectus femoris, biceps femoris.

RESULTS:

Across the first year, infants showed no electromyographic activity for approximately 50% of the stride cycle with poor rhythmicity and timing of muscles, when activated. Single muscle activation predominated; agonist-antagonist coactivation was low. Probability of individual muscle activity across the stride decreased with age.

CONCLUSIONS:

Infants with MMC show high variability in timing and duration of muscle activity, few complex combinations, and very little change over time.

Comment in

PMID:
23685739
[PubMed - indexed for MEDLINE]
PMCID:
PMC3706031
[Available on 2014/10/1]
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