Program in Occupational Therapy, University of Minnesota, Minneapolis, MN, USA.
Benedictine Living Community of St. Peter, St. Peter, MN, USA.
J Hand Ther. 2020 Jul-Sep;33(3):402-410.e2. doi: 10.1016/j.jht.2019.03.005. Epub 2019 Apr 19.
Descriptive normative.
Intrinsic hand strength can be impacted by hand arthritis, peripheral nerve injuries, and spinal cord injuries. Grip dynamometry does not isolate intrinsic strength, and manual muscle testing is not sensitive to change in grades 4 and 5. The Rotterdam Intrinsic Hand Myometer is a reliable and valid test of intrinsic hand strength; however, no adult normative data are available.
To describe age- and gender-stratified intrinsic hand strength norms in subjects aged 21 years and above and to determine if factors known to predict grip dynamometry also predict measures of intrinsic hand strength.
Three trials of 5 measures of maximal isometric intrinsic strength were performed bilaterally by 607 "healthy-handed" adult males and females. Average strength values were stratified by age and gender. Data were analyzed to determine the influence of demographic and anthropometric variables on intrinsic strength.
Intrinsic strength generally followed age and gender trends similar to grip dynamometry. Age, gender, body mass index, and the interaction between gender and body mass index were predictors of intrinsic strength, whereas in most cases, the hand being tested did not predict the intrinsic strength.
With the addition of these findings, age- and gender-stratified hand intrinsic strength norms now span from age 4 through late adulthood. Many factors known to predict grip dynamometry also predict intrinsic myometry. Additional research is needed to evaluate the impact of vocational and avocational demands on intrinsic strength.
These norms can be referenced to evaluate and plan hand therapy and surgical interventions for intrinsic weakness.
描述性规范。
手部关节炎、周围神经损伤和脊髓损伤会影响手部固有力量。握力计无法分离固有力量，而手动肌肉测试对 4 级和 5 级的变化不敏感。鹿特丹手部内在力量测量仪是一种可靠且有效的手部固有力量测试方法；然而，目前尚无成人的标准数据。
描述年龄和性别分层的 21 岁及以上受试者的手部固有力量正常值，并确定已知可预测握力计测量值的因素是否也可预测手部固有力量的测量值。
通过 607 名“健康手”的男性和女性进行了 3 次 5 次最大等长固有力量的测量，双侧均进行了测量。根据年龄和性别对平均力量值进行分层。分析数据以确定人口统计学和人体测量学变量对固有力量的影响。
固有力量通常遵循类似于握力计测量值的年龄和性别趋势。年龄、性别、体重指数以及性别和体重指数之间的相互作用是固有力量的预测因素，而在大多数情况下，所测试的手并不能预测固有力量。
随着这些发现的增加，手部固有力量的年龄和性别分层正常值现在从 4 岁跨越到成年后期。许多已知可预测握力计测量值的因素也可预测内在肌测力。需要进一步研究评估职业和业余需求对内在力量的影响。
这些正常值可用于评估和计划手部固有力量减弱的手部治疗和手术干预。
