Interaction between agonists in articulated motion of the thumb revealed by cadaveric simulations

2016 Fiscal Year Final Research Report

• Project/Area Number: 26280099
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Intelligent robotics
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Tada Mitsunori 国立研究開発法人産業技術総合研究所, 人間情報研究部門, 研究グループ長 (70392628)
• Co-Investigator(Kenkyū-buntansha): 中村 俊康 国際医療福祉大学, 保健医療学部, 教授 (70265859)
• Research Collaborator: KAWANO Yusuke ; KAMATA Yusaku
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 母指 / 運動解析 / 関節固定

Outline of Final Research Achievements

We investigated change in the thumb-tip motion before and after the trapeziometacarpal joint fusion in six cadavers. Tension was applied to the distal tendons of 4 extrinsic thumb muscles (extensor pollicis longus, flexor pollicis longus, abductor pollicis longus (APL), and extensor pollicis brevis) by the servomotors, while 4 intrinsic muscles (abductor pollicis brevis, opponens pollicis (OP), flexor pollicis brevis, and adductor pollicis) was applied tension by weights. Thumb-tip motion was measured by a motion capture system in six different intrinsic muscle tensions before and after the trapeziometacarpal joint fixation. The trapeziometacarpal joint fusion reduced the length when weighted the OP and pulled the APL most. After the joint fusion, the trajectory area of the thumb-tip was reduced to approximately 30% compared to the intact area. Area reduced due to the trapeziometacarpal arthrodesis was mostly found in a tolerable area in activity of daily life, however.

Free Research Field

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