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Estimation of gastrocnemius Muscle Volume Using Ultrasonography in Children with Spastic Cerebral Palsy

 Eun Sook Park  ;  Eungeol Sim  ;  Dong-Wook Rha  ;  Soojin Jung 
 YONSEI MEDICAL JOURNAL, Vol.55(4) : 1115-1122, 2014 
Journal Title
Issue Date
Cerebral Palsy/diagnostic imaging ; Cerebral Palsy/pathology* ; Child ; Child, Preschool ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Muscle, Skeletal/diagnostic imaging ; Muscle, Skeletal/pathology* ; Ultrasonography
Gastrocnemius muscle ; cerebral palsy ; magnetic resonance imaging ; ultrasound imaging ; volume
PURPOSE: This study aimed to investigate useful parameters for estimating gastrocnemius (GCM) muscle volume (MV) using ultrasonography (US) and anthropometry in children with spastic cerebral palsy (CP).
MATERIALS AND METHODS: Eighteen legs from nine children with spastic CP aged 2 to 6 years were investigated in this study. Tibial length (TL) of each leg was measured and muscle thickness (MT) and anatomical cross-sectional area (aCSA) of GCM muscles were assessed using US. The volume of the GCM was measured by magnetic resonance imaging (MRI) scans. The relationship of TL, MT, and aCSA with MV measured by MRI was investigated. Simple and multiple regression analyses were performed to establish muscle volume prediction equations.
RESULTS: Resting MT, aCSA, and TL were highly related to MV of both medial and lateral head of GCM determined by MRI. The MV prediction equation based on simple regression analysis resulted in r² values ranging from 0.591 to 0.832 (p<0.05). The r² values were higher using aCSA as independent variable than using MT. The MV prediction equation based on multiple regression analysis resulted in r² values ranging from 0.779 to 0.903 (p<0.05). However, the relatively high standard error of the estimate values ranged from 18.0-33.6% on simple regression and 15.5-25.6% on multiple regression. The contribution of aCSA was higher than that of MT for predicting MV of GCM.
CONCLUSION: Our study demonstrated the suitability of US assessment of aCSA and MT combined with TL for estimating MV of GCM in children with spastic CP and showed that aCSA is more useful parameter than MT.
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1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실) > 1. Journal Papers
Yonsei Authors
Rha, Dong Wook(나동욱) ORCID logo https://orcid.org/0000-0002-7153-4937
Park, Eun Sook(박은숙) ORCID logo https://orcid.org/0000-0002-9144-3063
Sim, Eun Geol(심은결)
Jung, Soo Jin(정수진)
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