Three-dimensional movement analysis of handwriting in subjects with hemiparesis and ataxia

点击翻译按钮获取中文摘要

Kinematic and morphological features of individual handwriting would be acquired after a long-term daily practice. Therefore, handwriting analysis gives us insight about characteristics of fine coordinated movement and motor learning. In this study, three dimensional movement analysis of the pen tip, finger and wrist was done while the subjects with hemiparesis or cerebellar ataxia were writing. Results indicated abnormally tight movement linkage of the pen tip and finger-wrist as well as decreased consistency of writing kinematics and morphology seen in the hemiparetic handwriting correlated with increase in writing time. Contrary, proximodistal movement dislinkage characteristic of the ataxic handwriting correlated with clinical severity of ataxia. Both tight linkage seen in the hemiparetic and dislinkage in the ataxic handwriting would result in poor handwriting. Regulation of the proximodistal movement linkage is important to control fine movements composed of multiple joints.