Arm and Trunk Movement Kinematics During Seated Reaching Within and Beyond Arm%26apos;s Length in People With Stroke: A Validity Study

作者：Wu Ching yi; Liing Rong jiuan; Chen Hsieh ching; Chen Chia ling; Lin Keh chung^*

来源：Physical Therapy, 2014, 94(6): 845-856.

DOI：10.2522/ptj.20130101

Background. Kinematic analysis is commonly used to objectively measure upper extremity movement performance after stroke. However, the concurrent validity and predictive validity of arm-trunk kinematics during reaching within and beyond arm%26apos;s length have not been studied. %26lt;br%26gt;Objective. The aim of this study was to estimate the concurrent validity of kinematic measures before and after treatment and the predictive validity for reaching within and beyond arm%26apos;s length after stroke. %26lt;br%26gt;Design. This was a. secondary analysis study. %26lt;br%26gt;Methods. Ninety-seven participants with stroke (mean age=55.9 years [SD=10.9]) received intensive treatment every weekday for 3 to 4 weeks. Kinematic reaching tasks and the Wolf Motor Function Test (WMFT) were used before and after treatment. The validity of the kinematic measures was estimated in relation to WMFT scores. %26lt;br%26gt;Results. Of the 8 kinematic variables that were measured, index movement time before treatment (R-2=.227-.362) and trunk movement time and trunk displacement after treatment (R-2=.095-.346) had the strongest association with the WMFT at both reaching distances. Trunk movement time and trunk displacement before treatment explained 6.9% to 14.9% of the variance in the WMFT after treatment. Kinematic variables explained 6.9% to 49.3% and 9.4% to 38.7% of the variance in the WMFT during a task within arm%26apos;s length and beyond arm%26apos;s length, respectively. %26lt;br%26gt;Limitations. The study has limited generalizability. %26lt;br%26gt;Conclusions. Different kinematic variables may partially reflect motor function before and after treatment to a limited degree. Although the predictive validity was modest, trunk movement may be considered a prognostic determinant of motor function after treatment. A reaching task within arm%26apos;s length may be a more suitable measure of kinematic performance for describing motor function than a reaching task beyond arm%26apos;s length.

• 出版日期2014-6
• 单位长春大学