EXTERNAL FINGER FORCES IN SUBMAXIMAL 5-FINGER STATIC PINCH PREHENSION
EXTERNAL FINGER FORCES IN SUBMAXIMAL 5-FINGER STATIC PINCH PREHENSION
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DOI：
10.1080/00140139208967813
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发表时间：
1992-03-01
期刊：
影响因子：
2.4
通讯作者：
WEBSTER, JG
中科院分区：
文献类型：
--
作者：
RADWIN, RG;OH, SY;WEBSTER, JG
将小的导电聚合物力传感器连接到远端指骨垫，用于测量次最大静态捏期间施加的单个手指力。使用中性手腕姿势垂直抓握用于测量所得五指捏力的线性力求和应变计测力计。使用45 mm和65 mm的捏距，在固定的总捏力水平（最大自主用力的10%、20%和30%）下测量单个手指力。同样，在抓握测力计并支撑1.0 kg、1.5 kg、1.5 kg和1.5 kg固定重量时，和2.0公斤的负载，使用捏跨度为45毫米和65毫米。食指和中指施加超过3 N的平均力比无名指和小指的固定总捏力任务。在10%最大随意用力水平下未观察到显著的个体手指力差异，但是在30%最大随意用力水平下，食指和中指施加的力比无名指和小指大5 N以上。食指、中指、无名指和小指的平均贡献分别为33%、33%、17%和15%。当用力水平从10%增加到30%时，中指的贡献不是恒定的，从25%增加到38%。当负载重量从1.0 kg增加到2.0 kg时，总夹紧力从15 N增加到3 N。在静态提升任务期间，食指施加的平均力比中指大1N以上，并且比无名指和小指大3N以上。对于静态提升任务，食指、中指、无名指和小指的平均贡献分别为35%、26%、20%和19%。当负重从1.0 kg增加到2.0 kg时，食指的贡献不是恒定的，从38%下降到30%。
Small conductive polymer force sensors were attached to the distal phalangeal pads for measuring individual finger forces exerted during submaximal static pinch. A linear force summing strain gauge dynamometer for measuring resultant five-finger pinch force was grasped vertically using a neutral wrist posture. Individual finger forces were measured at fixed total pinch force levels of 10%, 20%, and 30% of maximum voluntary exertion using pinch spans of 45 mm and 65 mm. Total pinch force and individual finger forces were also measured while similarly grasping the dynamometer and supporting fixed weights for 1.0 kg, 1.5 kg, and 2.0 kg loads using pinch spans of 45 mm and 65 mm. The index and middle fingers exerted more than 3 N greater average force than the ring and small fingers for the fixed total pinch force task. No significant individual finger force differences were observed at the 10% maximum voluntary exertion level, however both the index and middle fingers exerted more than 5 N greater force than the ring and small fingers at the 30% maximum voluntary exertion level. The average contribution of the index, middle, ring, and small fingers were 33%, 33%, 17%, and 15%, respectfully, for the fixed total pinch force task. As exertion level increased from 10% to 30%, the contribution of the middle finger was not constant increasing from 25% to 38%. Total pinch force increased from 15 N to 3 N when the load weight increased from 1.0 kg to 2.0 kg. The index finger exerted more than 1 N greater average force than the middle finger, and more than 3 N greater average force than the ring and small fingers during the static lifting task. The average contribution of the index, middle, ring, and small fingers were 35%, 26%, 20%, and 19%, respectfully, for the static lifting task. As load weight increased from 1.0 kg to 2.0 kg, the contribution of the index finger was not constant, decreasing from 38% to 30%.