Li Lin, Li YanXia, Jia Peng, Wang Shuyan, Wang Wanpeng, Liu Yuxiang
Department of Physical Education, Renmin University of China, Beijing, China.
College of Physical Education, Langfang Normal University, Langfang, Hebei, China.
Front Hum Neurosci. 2022 Oct 26;16:990431. doi: 10.3389/fnhum.2022.990431. eCollection 2022.
Pinch force sense plays an important role in the performance of daily finger movements, including tip, key, palmar pinch. The present study investigated the roles of pinch type in the sensation of pinch force among healthy participants in the ipsilateral force reproduction trial. This study instructed forty healthy adult subjects (20 women and 20 men) in producing reference forces at different levels [10, 30, 50% maximal voluntary isometric contraction (MVIC)] by adopting 3 pinch types (tip, key, and palmar pinches) and in reproducing the above force levels with the identical hand. Our study revealed that subjects are significantly more sensitive detecting alterations of pinching forces with tip pinch but not key or palmar pinch under high forces (30 and 50% MVIC) but not at lower force levels (10% MVIC).
捏力感知在日常手指运动表现中起着重要作用，包括指尖捏、钥匙捏、掌侧捏。本研究在同侧力再现试验中，调查了捏的类型对健康受试者捏力感觉的影响。本研究指导40名健康成年受试者（20名女性和20名男性）采用三种捏的类型（指尖捏、钥匙捏和掌侧捏）产生不同水平[10%、30%、50%最大自主等长收缩（MVIC）]的参考力，并用同一只手再现上述力水平。我们的研究表明，在高力水平（30%和50%MVIC）下，受试者对指尖捏力变化的检测明显更敏感，而对钥匙捏或掌侧捏力变化的检测则不然，但在低力水平（10%MVIC）下并非如此。
