Background/Aims: Many motor impairments are present in older adults with cognitive decline. One of them is the impairment of hand dexterity and bimanual coordination that result in poor functional ability in the activities of daily living (ADL). This study investigated the effects of hand dexterity and bimanual coordination declination on the sub-domains of ADL in older adults with mild cognitive impairment (MCI). Methods: Thirty-one senior individuals with MCI were recruited in this study. The Purdue Pegboard Test was used to measure hand dexterity, and bimanual coordination was assessed by the continuous circle-drawing task. Their ADL were assessed with the General Activity Daily Living questionnaire. Results: The correlations analysis showed an association between the dominant hand and bimanual dexterity with the domestic domain of ADL and all conditions of hand dexterity with the complex domain of ADL. Moreover, the multiple regression analysis showed that the predictor of the greatest effect for domestic and complex domains was dominant hand dexterity. Discussion/Conclusion: These results revealed that dominant hand dexterity strongly affected domestic and complex ADL in older adults with MCI. There were age-related changes regarding lateral asymmetrical motor reduction, especially in cognitive tasks. However, complex tasks involving cognitive function may need dominant, nondominant and bimanual hand dexterity.
Dement Geriatr Cogn Disord Extra 2022;12:24–32

中文翻译：

---

手部灵巧度与双手协调对轻度认知障碍老年人日常生活活动的相关性

背景/目的：认知能力下降的老年人中存在许多运动障碍。其中之一是手灵巧性和双手协调能力受损，导致日常生活活动 (ADL) 的功能能力差。本研究调查了手灵活性和双手协调偏角对轻度认知障碍 (MCI) 老年人 ADL 子域的影响。方法：本研究招募了 31 名患有 MCI 的老年人。Purdue Pegboard Test 用于测量手的灵活性，并通过连续画圈任务评估双手协调性。他们的 ADL 使用一般活动日常生活问卷进行评估。结果：相关性分析表明，惯用手和双手灵巧与 ADL 的国内领域以及手灵巧的所有条件与 ADL 的复杂领域之间存在关联。此外，多元回归分析表明，对国内和复杂领域影响最大的预测因素是主导手灵巧度。讨论/结论：这些结果表明，主要手灵巧对患有 MCI 的老年人的家庭和复杂 ADL 有很大影响。横向不对称运动减少存在与年龄相关的变化，尤其是在认知任务中。然而，涉及认知功能的复杂任务可能需要显性、非显性和双手灵巧性。
Dement Geriatr Cogn Disord Extra 2022；12：24–32