Biomechanical analysis of power grip in cadaver-arm experiment  

Oleh:

Kong, Yong-Ku ; Kang, Hyun-Sung ; Kim, Ji-Su ; Kim, Dae-Min

Jenis: Article from Proceeding
Dalam koleksi: The 14th Asia Pacific Industrial Engineering and Management Systems Conference (APIEMS), 3-6 December 2013 Cebu, Philippines, page 1-5.
Topik: Cadaver experiment; Grip span; Grip strength; Muscle strength; Tendon ratio
Fulltext: 1156.pdf (284.87KB)

Isi artikel

The purpose of this study was to biomechanically analyze the effect of different force ratios(1:1, 1:1.5, 1:2, 1:3) of tendons and grip spans(45, 50, 55, 60mm) on the total grip strength in target forces(70, 105, 140N) using cadaver arms. For this study, a system to fix the cadaver-arm, to control muscle force and to measure total grip strength was constructed. First, the cadaver-arm was fixed using the T-slotted profile. Second, for measuring muscle force, muscles were connected to a power cylinder by wires, and load cell was hanged in front of power cylinder. The last, the MFFM(Multi-Finger Force Measurement system) system was developed to evaluate individual and total finger forces when all fingers have identical grip spans as well as varying grip spans. As a result, Statistical analysis showed that the effect of target force and grip span on total grip strength was statistically significant. Total grip strength had a tendency of increase as the increase of tendon force which was statistically significant. In particular, target force of 70N led to the lowest level(25.5N) of total grip strength, where as target force of 140N led to the highest (37.3N) level. The target force was to 2.75 times from 3.75 times higher than the total grip strength. Total grip strength was different, according to grip span, and thus showed statistically significant differences, as well. According to the experiment, total grip strength was the largest at 33.7N, when grip span was 45mm. As a study on the process of building and applying a system for a cadaver experiment, this was conducted to develop and use a biomechanical model mathematically and simulative. In conclusion, for this objective, the limits of this research will be corrected and supplemented continuously.

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