Trunk and hip muscle activation patterns are different during walking in young children with and without cerebral palsy.

TitleTrunk and hip muscle activation patterns are different during walking in young children with and without cerebral palsy.
Publication TypeJournal Article
Year of Publication2010
AuthorsProsser LA, Lee SCK, VanSant AF, Barbe MF, Lauer RT
JournalPhys Ther
Volume90
Issue7
Pagination986-97
Date Published2010 Jul
ISSN1538-6724
KeywordsAnthropometry, Biomechanical Phenomena, Cerebral Palsy, Chi-Square Distribution, Child, Child, Preschool, Electromyography, Feedback, Sensory, Female, Gait Disorders, Neurologic, Hip, Humans, Male, Muscle, Skeletal, Physical Therapy Modalities, Posture, Statistics, Nonparametric, Thorax, Time Factors, Video Recording
Abstract

BACKGROUND: Poor control of postural muscles is a primary impairment in people with cerebral palsy (CP).

OBJECTIVE: The purpose of this study was to investigate differences in the timing characteristics of trunk and hip muscle activity during walking in young children with CP compared with children with typical development (TD).

METHODS: Thirty-one children (16 with TD, 15 with CP) with an average of 28.5 months of walking experience participated in this observational study. Electromyographic data were collected from 16 trunk and hip muscles as participants walked at a self-selected pace. A custom-written computer program determined onset and offset of activity. Activation and coactivation data were analyzed for group differences.

RESULTS: The children with CP had greater total activation and coactivation for all muscles except the external oblique muscle and differences in the timing of activation for all muscles compared with the TD group. The implications of the observed muscle activation patterns are discussed in reference to existing postural control literature.

LIMITATIONS: The potential influence of recording activity from adjacent deep trunk muscles is discussed, as well as the influence of the use of an assistive device by some children with CP.

CONCLUSIONS: Young children with CP demonstrate excessive, nonreciprocal trunk and hip muscle activation during walking compared with children with TD. Future studies should investigate the efficacy of treatments to reduce excessive muscle activity and improve coordination of postural muscles in CP.

DOI10.2522/ptj.20090161
Alternate JournalPhys Ther
PubMed ID20430948
PubMed Central IDPMC2897131
Grant ListR03 NS048875 / NS / NINDS NIH HHS / United States
R01 HD043859 / HD / NICHD NIH HHS / United States
/ / Intramural NIH HHS / United States
R01HD043859 / HD / NICHD NIH HHS / United States
R03NS048875 / NS / NINDS NIH HHS / United States