アルツハイマー型痴呆女性高齢者の利き手の優位性に関する研究—作業量の検討を通して

A study on the superiority of dominant-hand in female elderly with Alzheimer's dementia : Based on a quantitative activity analysis

要旨：アルツハイマー型痴呆女性高齢者の両手動作時の利き手と非利き手の作業量，及び認知症の重症度との関連性について検証した．認知症群，対照群各20名にスティック手織り(テキスタ)を用い，15分間の利き手と非利き手の作業量，及び認知症の重症度との関係を分析した．対照群は全例が利き手の作業量＞非利き手であったのに対し，認知症群では20名中9名で非利き手の作業量の方が有意(p＜0.05)に多かった．彼らの認知症重症度評価，CDRの得点を比較した結果，「問題解決と判断」で9名に有意な低下が認められたことから，非利き手の作業量が利き手を上まわった時期に，認知機能の「問題解決と判断」に低下が生じる可能性が示唆された．

　The purposes of this study were to examine the superiority of dominant-hand functions of bimanual activities, so called 'texture', and to study the level of dementia in female elderly with Alzheimer disease (AD). Twenty subjects with AD (ADgroup) and20 without AD (controlgroup) in a facility of health care services for the elderly participated in this study. The results were as follows : cTotal quantity of the activity showed no significant difference in the AD and control group. (2) All subjects in the control group showed a dominant hand > non-dominant (p＜0.01) quantity of activity. (3) 9 out of 20 in the AD group showed a non-dominant hand> dominant hand (p＜0.05). (4) 9 AD subjects showed a severe level of dementia (p＜0.01) when we analyzed the sub-items of CDR. These findings suggest that the non-dominant hand function will give us a key point for the study of the progression of dementia.