Muscle histopathology in children with spastic cerebral palsy receiving botulinum toxin type A

Journal article


Valentine, Jane P., Stannage, Katherine, Fabian, Vicki, Ellis, Kevin, Reid, Siobhan L., Pitcher, Christian Andrew and Elliott, Catherine M.. (2016). Muscle histopathology in children with spastic cerebral palsy receiving botulinum toxin type A. Muscle & Nerve. 53(3), pp. 407 - 414. https://doi.org/10.1002/mus.24763
AuthorsValentine, Jane P., Stannage, Katherine, Fabian, Vicki, Ellis, Kevin, Reid, Siobhan L., Pitcher, Christian Andrew and Elliott, Catherine M.
Abstract

Introduction: Botulinum toxin A ( BoNTA ) is routine treatment for hypertonicity in children with cerebral palsy ( CP ). Methods: This single-blind, prospective, cross-sectional study of 10 participants ( mean age 11 years 7 months ) was done to determine the relationship between muscle histopathology and BoNTA in treated medial gastrocnemius muscle of children with CP. Open muscle biopsies were taken from medial gastrocnemius muscle and vastus lateralis (control) during orthopedic surgery. Results: Neurogenic atrophy in the medial gastrocnemius was seen in 6 participants between 4 months and 3 years post-BoNTA. Type 1 fiber loss with type 2 fiber predominance was significantly related to the number of BoNTA injections ( r = 0.89, P < 0.001 ). Conclusions: The impact of these changes in muscle morphology on muscle function in CP is not clear. It is important to consider rotating muscle selection or injection sites within the muscle or allowing longer time between injections.

Keywordsbotulinum toxin; cerebral palsy; hypertonia; medial gastrocnemius; muscle histopathology; neurogenic atrophy
Year2016
JournalMuscle & Nerve
Journal citation53 (3), pp. 407 - 414
PublisherJohn Wiley & Sons, Inc.
ISSN0148-639X
Digital Object Identifier (DOI)https://doi.org/10.1002/mus.24763
Scopus EID2-s2.0-84956925894
Page range407 - 414
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
Publisher's version
File Access Level
Controlled
Place of publicationUnited States
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