肌肉结构预测最大力量，并与脑瘫患者的活动水平相关。
Muscle architecture predicts maximum strength and is related to activity levels in cerebral palsy.
机构信息
Department of Health Professions, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC 29425, USA.
出版信息
Phys Ther. 2010 Nov;90(11):1619-30. doi: 10.2522/ptj.20090377. Epub 2010 Sep 16.
BACKGROUND
Muscle architecture is known to be predictive of muscle function. However, it is unknown whether this relationship is similar in children and adolescents with and without cerebral palsy (CP).
OBJECTIVE
The objective of this study was to determine whether the architecture of the rectus femoris (RF) and vastus lateralis (VL) muscles was predictive of maximum voluntary knee extensor torque in children and adolescents with and without CP and whether these measures were related to activity and participation levels.
DESIGN
A case-control design was used.
METHODS
Eighteen participants with CP (mean age=12.0 years, SD=3.2) at Gross Motor Function Classification System (GMFCS) levels I through IV and 12 age-matched peers with typical development (mean age=12.3 years, SD=3.9) were evaluated. Muscle thickness, fascicle length, and fascicle angle of the RF and VL muscles were measured with 2-dimensional, B-mode ultrasound imaging. The activity and participation measures used for participants with CP were the Pediatric
OUTCOMES
Data Collection Instrument (PODCI) and the Activities Scale for Kids, Performance Version (ASKp).
RESULTS
When age and GMFCS level were controlled for, VL muscle thickness was the best predictor of knee extensor isometric torque in the group with CP (R(2)=.85). This prediction was similar to the prediction from VL muscle thickness and age in participants with typical development (R(2)=.91). Rectus femoris muscle fascicle length was significantly correlated with the Sports and Physical Functioning Scale of the PODCI (ρ=.49), and VL muscle fascicle angle was correlated with the Transfers and Basic Mobility Scale of the PODCI (r=.47) and with ASKp Locomotion subdomain (r=.50).
LIMITATIONS
A limitation of this study was the small sample size.
CONCLUSIONS
Ultrasound measures of VL muscle thickness, adjusted for age and GMFCS level, were highly predictive of maximum torque and have the potential to serve as surrogate measures of voluntary strength (force-generating capacity) in children and adolescents with and without CP.
背景
肌肉结构已知可预测肌肉功能。然而，尚不清楚这种关系在患有和不患有脑瘫（CP）的儿童和青少年中是否相似。
目的
本研究的目的是确定股直肌（RF）和股外侧肌（VL）的结构是否可预测 CP 和非 CP 儿童和青少年的最大自主膝关节伸肌扭矩，以及这些测量值是否与活动和参与水平相关。
设计
采用病例对照设计。
方法
评估了 18 名 GMFCS 水平 I 至 IV 级的 CP 患儿（平均年龄 12.0 岁，标准差 3.2）和 12 名年龄匹配的正常发育同伴（平均年龄 12.3 岁，标准差 3.9）。使用二维、B 型超声成像测量 RF 和 VL 肌肉的肌肉厚度、肌束长度和肌束角度。CP 患儿使用的活动和参与测量工具是儿科结果数据采集工具（PODCI）和儿童活动量表，表现版（ASKp）。
结果
当控制年龄和 GMFCS 水平时，VL 肌肉厚度是 CP 组膝关节等长伸肌扭矩的最佳预测指标（R(2)=.85）。这种预测与正常发育参与者中 VL 肌肉厚度和年龄的预测相似（R(2)=.91）。股直肌肌束长度与 PODCI 的运动和身体功能量表显著相关（ρ=.49），VL 肌束角度与 PODCI 的转移和基本移动量表以及 ASKp 运动子域相关（r=.47 和 r=.50）。
局限性
本研究的一个局限性是样本量小。
结论
经年龄和 GMFCS 水平调整的 VL 肌肉厚度超声测量值高度预测最大扭矩，有可能成为 CP 和非 CP 儿童和青少年自主力量（产生力量的能力）的替代测量值。
Zotero 插件