The relationship between spasticity and muscle volume of the knee extensors in children with cerebral palsy.

TitleThe relationship between spasticity and muscle volume of the knee extensors in children with cerebral palsy.
Publication TypeJournal Article
Year of Publication2012
AuthorsPierce SR, Prosser LA, Lee SCK, Lauer RT
JournalPediatr Phys Ther
Volume24
Issue2
Pagination177-81; discussion 182
Date Published2012 Summer
ISSN1538-005X
KeywordsAdolescent, Cerebral Palsy, Child, Female, Humans, Knee, Magnetic Resonance Imaging, Male, Muscle Spasticity, Muscle Strength, Muscle Strength Dynamometer, Muscle, Skeletal, Organ Size, Range of Motion, Articular, Reflex, Retrospective Studies
Abstract

PURPOSE: The purpose of this study was to examine the relationship between spasticity and muscle volume in children with cerebral palsy (CP), using isokinetic dynamometry and magnetic resonance imaging.

METHODS: A retrospective sample of 8 children with diplegic CP was analyzed. One set of 10 passive knee flexion movements was completed at a velocity of 180° per second with concurrent surface electromyography of the medial hamstrings (MH) and vastus lateralis (VL) to assess knee extensor spasticity. Magnetic resonance imaging was used to measure maximum cross-sectional area and muscle volume of the quadriceps femoris.

RESULTS: The quadriceps femoris muscle volume was positively correlated with MH reflex activity, VL reflex activity, MH/VL co-contraction, and peak knee extensor passive torque (P < .05).

CONCLUSION: The present findings suggest that higher levels of knee extensor muscle spasticity are associated with greater quadriceps muscle volume in children with spastic diplegic CP.

DOI10.1097/PEP.0b013e31824cc0a9
Alternate JournalPediatr Phys Ther
PubMed ID22466388
PubMed Central IDPMC3718076
Grant ListR03 NS048875 / NS / NINDS NIH HHS / United States
R01 HD043859 / HD / NICHD NIH HHS / United States
R03-NS048875 / NS / NINDS NIH HHS / United States
L40 HD045169 / HD / NICHD NIH HHS / United States
R01-HD043859 / HD / NICHD NIH HHS / United States