脳血管障害右片麻痺者の書字動作分析—書字の作業特性と作業中の筋電図および関節運動との関連

An analysis of handwriting activity on right adult hemiplegia: The relation between character of handwriting and muscle power, changing joint angles

要旨：脳血管障害による右片麻痺者の健手(左手)，および健常者の右手，左手，全て右利き者，における書字動作について，書字の正確さ，速度，筆圧を測定すると同時に，表面筋電図と電気角度計を用いて動作の解析を行いその関連を求めた．

　結果は，片麻痺者の動作は，末梢の動きが少なく，より中枢側を使用していることが明らかになった．その結果，速度，筆圧において劣っており，動作の変化に対応して筋肉をうまく使えないことも明らかになった．この結果は片麻痺者における巧緻動作の特徴とも考えられる．

　これらの検討を踏まえ，実用性の視点から見た書字練習の方法が示唆された．

　This study was designed to investigate handwriting activity of left hand on right adult hemiplegia caused by a cerebral vascular accident. The target group was examined against a controlled group of healthy adults. The handwriting activities of both the right and left hands of these adults were the subject of the research. The speed, accuracy, pressure, changing joint angles and muscle power of handwriting were measured, and the relation between these factors were studied.

　In hemiplegia, distal joints moved little, and distal muscle power was weaker than in the controlled group. Therefore, the pressure of handwriting was weaker and speed was also slower. In addition, they lacked in accuracy as compared to the controlled group.

　The results indicate that poor ability of using muscles appears to be charactaristic of fine movement in hemiplegia. It suggests a method of handwriting with practical use.