Roessingh Research and Development, Roessinghsbleekweg 33B, Enschede, The Netherlands.
J Neuroeng Rehabil. 2011 Mar 24;8:15. doi: 10.1186/1743-0003-8-15.
The majority of stroke survivors have to cope with deficits in arm function, which is often measured with subjective clinical scales. The objective of this study is to examine whether circle drawing metrics are suitable objective outcome measures for measuring upper extremity function of stroke survivors.
Stroke survivors (n = 16) and healthy subjects (n = 20) drew circles, as big and as round as possible, above a table top. Joint angles and positions were measured. Circle area and roundness were calculated, and synergistic movement patterns were identified based on simultaneous changes of the elevation angle and elbow angle.
Stroke survivors had statistically significant lower values for circle area, roundness and joint excursions, compared to healthy subjects. Stroke survivors moved significantly more within synergistic movement patterns, compared to healthy subjects. Strong correlations between the proximal upper extremity part of the Fugl-Meyer scale and circle area, roundness, joint excursions and the use of synergistic movement patterns were found.
The present study showed statistically significant differences in circle area, roundness and the use of synergistic movement patterns between healthy subjects and stroke survivors. These circle metrics are strongly correlated to stroke severity, as indicated by the proximal upper extremity part of the FM score.In clinical practice, circle area and roundness can give useful objective information regarding arm function of stroke survivors. In a research setting, outcome measures addressing the occurrence of synergistic movement patterns can help to increase understanding of mechanisms involved in restoration of post stroke upper extremity function.
大多数中风幸存者都需要应对手臂功能的缺陷，而这通常通过主观的临床量表进行测量。本研究的目的是检验圆绘度量是否适合作为测量中风幸存者上肢功能的客观结果测量指标。
中风幸存者（n=16）和健康受试者（n=20）在桌面上方尽可能大且圆地绘制圆圈。测量关节角度和位置。计算圆的面积和圆度，并根据提升角度和肘部角度的同时变化识别协同运动模式。
与健康受试者相比，中风幸存者的圆面积、圆度和关节活动度的数值明显较低。与健康受试者相比，中风幸存者在协同运动模式中移动的幅度明显更大。在 Fugl-Meyer 量表的近端上肢部分与圆面积、圆度、关节活动度和协同运动模式的使用之间发现了强烈的相关性。
本研究表明，健康受试者和中风幸存者之间在圆面积、圆度和协同运动模式的使用方面存在统计学上的显著差异。这些圆度量指标与中风严重程度密切相关，如 FM 评分的近端上肢部分所示。在临床实践中，圆面积和圆度可以为中风幸存者的手臂功能提供有用的客观信息。在研究环境中，针对协同运动模式发生的结果测量指标可以帮助增加对中风后上肢功能恢复所涉及机制的理解。
