1 / 13

學號： N16941703 學生 : 洪振翔 指導教授 : 朱銘祥 林宙晴 實驗室：人機系統實驗室 2007/05/29

Paper Review Contribution of the extrinsic and intrinsic hand muscles to the moments in finger joints Z.M. Li, V.M. Zatsiorsky, M.L. Latash Clinical Biomechanics 15(2000). 學號： N16941703 學生 : 洪振翔 指導教授 : 朱銘祥 林宙晴 實驗室：人機系統實驗室 2007/05/29. Outline. Introduction Goals Methods

woods
Download Presentation

學號： N16941703 學生 : 洪振翔 指導教授 : 朱銘祥 林宙晴 實驗室：人機系統實驗室 2007/05/29

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Paper ReviewContribution of the extrinsic and intrinsic hand muscles to the moments in finger jointsZ.M. Li, V.M. Zatsiorsky, M.L. LatashClinical Biomechanics 15(2000) 學號：N16941703 學生: 洪振翔 指導教授: 朱銘祥 林宙晴 實驗室：人機系統實驗室 2007/05/29

  2. Outline • Introduction • Goals • Methods • Modeling • Results • Discussion

  3. Introduction(1) • Extrinsic muscles: originate outside the hand. - responsible for the primary functioning in a variety of tasks - extensor、flexor • Intrinsic muscles: originate and insert within the hand. -provide necessary balance and fine tuning of the multi-joints system

  4. Introduction(2) • In clinical practice the force of FDP is estimated subjectively. • If we want to calculate the moments at the finger joints in static conditions, both the magnitude and direction of the external force must known. • In this study, a novel measuring system (the suspension system) was developed.

  5. Goals • To develop a method of estimating force produced by the flexor digitorum profundus (FDP), flexor digitorum superficialis (FDS) and intrinsic muscles (INT). • To estimate the contribution of these muscles to the finger joint moments.

  6. Methods • Apparatus -the suspension system • Ten right-handed male • Experimental procedure 1. three location -ExpDP, ExpDIP, ExpPIP 2. press down maximally -the interphalangeal joints are fully extended 3. EMG of EDC (extensor digitorum communis)

  7. Modeling(1) • Finger joint moment • Muscles counterbalancing an external finger moment at the joints at different loop positions

  8. Modeling(2) • Analysis of muscle forces and their contribution to joint moment

  9. Results(1) • Contribution of muscle groups to joint moments For ExpDP, For ExpDP, For ExpDIP,

  10. Results(2) • Muscle forces The maximal forces produced by individual muscles depended on the experimental condition.

  11. Discussion(1) • The “suspension” design in this study is advantageous in that the orientation of force application can be pre-specified. • In this study the fingers were extended and the force was applied at the middle of the distal phalanx which might be similar to the pulp pinch posture. • In the model, the contribution of the INT to the extensor mechanism at the PIP and DIP joints was neglected.

  12. Discussion(2) • The dorsal and palmar interossei and lumbricals were lumped together and viewed a single muscle that produced a moment solely at the MCP joint. • The assumption is justified because in the experiments the fingers were extended. • As a result, the effects of extensor mechanism are relatively small when the point of force application is at distal position.

  13. Thanks for your attention

More Related