Nicholson Kristen F, Russo Stephanie A, Kozin Scott H, Zlotolow Dan A, Hulbert Robert L, Rowley K Michael, Richards James G
Biomechanics and Movement Science Program, University of Delaware, Newark, DE.
J Appl Biomech. 2014 Feb;30(1):128-33. doi: 10.1123/jab.2012-0180.
Several studies have described using an acromion marker cluster for measuring scapular orientation in healthy adults performing planar motions. It is unknown whether the acromion marker cluster method will provide the same level of accuracy in children with brachial plexus birth palsy. This study compared this method to palpation for calculating scapular orientation in children with brachial plexus birth palsy performing clinically relevant movements. Scapular orientation in ten patients was determined by palpation and an acromion marker cluster in neutral and six Modified Mallet positions. RMSEs and mean relative errors were calculated. Resultant RMSEs ranged from 5.2 degrees to 21.4 degrees. The averages of the mean relative errors across all positions for each axis were 177.4% for upward/downward rotation, 865.0% for internal/external rotation, and 166.2% for anterior/posterior tilt. The acromion marker cluster method did not accurately measure scapular rotation relative to the total movement on an individual or group basis in the population. With most relative errors over 100%, the acromion marker cluster method often produced errors larger than the actual measured motion. The accuracy of the acromion marker cluster method limits its use as a clinical tool for measuring scapular kinematics on children with brachial plexus birth palsy.
多项研究描述了在进行平面运动的健康成年人中使用肩峰标记簇来测量肩胛骨方向。对于患有臂丛神经产瘫的儿童，肩峰标记簇方法是否能提供相同水平的准确性尚不清楚。本研究将该方法与触诊法进行了比较，以计算患有臂丛神经产瘫的儿童在进行临床相关运动时的肩胛骨方向。通过触诊和肩峰标记簇确定了10例患者在中立位和六个改良马利特位时的肩胛骨方向。计算了均方根误差（RMSE）和平均相对误差。所得RMSE范围为5.2度至21.4度。每个轴上所有位置的平均相对误差平均值在向上/向下旋转时为177.4%，在向内/向外旋转时为865.0%，在前倾/后倾时为166.2%。肩峰标记簇方法在个体或群体基础上相对于总体运动不能准确测量肩胛骨旋转。由于大多数相对误差超过100%，肩峰标记簇方法产生的误差往往大于实际测量的运动。肩峰标记簇方法的准确性限制了其作为测量臂丛神经产瘫儿童肩胛骨运动学的临床工具的应用。
