Flexor tendon force ratios affect grip force and finger joint motion on power grip: A cadaver model

Shi Hyun Park, Jesun Hwang, Andris Freivalds

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We studied the effect of flexor tendon force ratio with regard to the grip force and the finger joint angle on power grip motion in a cadaver model using the hand motion simulator. The hand motion simulator was developed with a force delivery unit and data acquisition system. The simulator controlled both flexor tendon forces (FDP and FDS) ranged from 1:1 to 1:6 of FD:FDP. 40% of FDS force to total tendon force (i.e. 3:2 FDP to FDS) showed the highest grip force. Also, the internal tendon force was 5.3 times higher than externally applied grip force, and the efficiency of the forces was best at the 3:2 FDP to FDS force ratio. The finger joint angles were changed according to the tendon force ratios of FDP to FDS. These results demonstrate that awkward finger motion and posture may lose the force efficiency between internal and external forces and cause higher internal impact that may be a risk factor causing carpal tunnel syndrome.

Original languageEnglish (US)
Title of host publicationErgonomics for All
Subtitle of host publicationCelebrating PPCOE's 20 Years of Excellence - Selected Papers of the Pan-Pacific Conference on Ergonomics, PPCOE 2010
Pages55-59
Number of pages5
StatePublished - Dec 1 2011
Event9th Pan-Pacific Conference on Ergonomics, PPCOE 2010 - Kaohsiung, Taiwan, Province of China
Duration: Nov 7 2010Nov 10 2010

Publication series

NameErgonomics for All: Celebrating PPCOE's 20 Years of Excellence - Selected Papers of the Pan-Pacific Conference on Ergonomics, PPCOE 2010

Other

Other9th Pan-Pacific Conference on Ergonomics, PPCOE 2010
CountryTaiwan, Province of China
CityKaohsiung
Period11/7/1011/10/10

All Science Journal Classification (ASJC) codes

  • Human Factors and Ergonomics

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