手で操作する義手のユーザーによるリーチの事例

A case study of reaching by a user of a manually-operated artificial hand.

• C Fraser
• A W Wing

抄録

リーチには、物体に向かって手を運ぶことと、物体に到着する前に手を適切な量だけ開くことの両方が含まれます。人手で操作した人工左手の動作を、熟練者の自然な右手の動作と比較しました。物体を拾い上げる動作は義手の方が遅いが，両手の開き動作や搬送動作には類似性が見られた．人工手と自然手では運動を支えるシステムに大きな機械的な違いがあるものの、親指と指の別々の動きにまで類似性が見られた。本研究で採用された人工手の制御戦略について議論し、人工手の新規ユーザーのトレーニングに関連した研究を行った。

Reaching involves both transport of the hand toward an object and opening of the hand by an appropriate amount before arrival at the object. Movements of a manually-controlled artificial left-hand are compared with movements of the natural right-hand of a proficient user of an artificial hand. Although picking up of objects was slower with the artificial hand, similarities in opening and transport movements were observed in the two hands. Depsite major mechanical differences in the systems subserving movement in the artificial and natural hands, the similarities extended to the separate movements of the thumb and finger. The strategy of artificial hand control employed by this subject is discussed and related to training new users of artificial hands.