This article presented an assessment of quantitative measures of workspace (WS) attributes under simulated proximal interphalangeal (PIP) joint arthrodesis of the index finger. Seven healthy subjects were tested with the PIP joint unconstrained (UC) and constrained to selected angles using a motion analysis system. A model of the constrained finger was developed in order to address the impact of the inclusion of prescribed joint arthrodesis angles on WS attributes. Model parameters were obtained from system identification experiments involving flexion–extension (FE) movements of the UC and constrained finger. The data of experimental FE movements of the constrained finger were used to generate the two-dimensional (2D) WS boundaries and to validate the model. A weighted criterion was formulated to define an optimal constraint angle among several system parameters. Results indicated that a PIP joint immobilization angle of 40–50 deg of flexion maximized the 2D WS. The analysis of the aspect ratio of the 2D WS indicated that the WS was more evenly distributed as the imposed PIP joint constraint angle increased. With the imposed PIP joint constraint angles of 30 deg, 40 deg, 50 deg, and 60 deg of flexion, the normalized maximum distance of fingertip reach was reduced by approximately 3%, 4%, 7%, and 9%, respectively.
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Research-Article
Assessment of Workspace Attributes Under Simulated Index Finger Proximal Interphalangeal Arthrodesis
Paul G. Arauz,
Paul G. Arauz
Manufacturing and Automation Laboratory,
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: paul.arauz@stonybrook.edu
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: paul.arauz@stonybrook.edu
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Sue A. Sisto,
Sue A. Sisto
Professor
Rehabilitation Research and Movement
Performance Laboratory,
School of Health Technology and Management,
Stony Brook University,
Stony Brook 11794, NY
e-mail: sue.sisto@stonybrook.edu
Rehabilitation Research and Movement
Performance Laboratory,
School of Health Technology and Management,
Stony Brook University,
Stony Brook 11794, NY
e-mail: sue.sisto@stonybrook.edu
Search for other works by this author on:
Imin Kao
Imin Kao
Professor
Manufacturing and Automation Laboratory,
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: imin.kao@stonybrook.edu
Manufacturing and Automation Laboratory,
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: imin.kao@stonybrook.edu
Search for other works by this author on:
Paul G. Arauz
Manufacturing and Automation Laboratory,
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: paul.arauz@stonybrook.edu
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: paul.arauz@stonybrook.edu
Sue A. Sisto
Professor
Rehabilitation Research and Movement
Performance Laboratory,
School of Health Technology and Management,
Stony Brook University,
Stony Brook 11794, NY
e-mail: sue.sisto@stonybrook.edu
Rehabilitation Research and Movement
Performance Laboratory,
School of Health Technology and Management,
Stony Brook University,
Stony Brook 11794, NY
e-mail: sue.sisto@stonybrook.edu
Imin Kao
Professor
Manufacturing and Automation Laboratory,
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: imin.kao@stonybrook.edu
Manufacturing and Automation Laboratory,
Department of Mechanical Engineering,
Stony Brook University,
Stony Brook 11790, NY
e-mail: imin.kao@stonybrook.edu
1Corresponding author.
Manuscript received October 12, 2015; final manuscript received March 8, 2016; published online March 25, 2016. Assoc. Editor: Zong-Ming Li.
J Biomech Eng. May 2016, 138(5): 051005 (11 pages)
Published Online: March 25, 2016
Article history
Received:
October 12, 2015
Revised:
March 8, 2016
Citation
Arauz, P. G., Sisto, S. A., and Kao, I. (March 25, 2016). "Assessment of Workspace Attributes Under Simulated Index Finger Proximal Interphalangeal Arthrodesis." ASME. J Biomech Eng. May 2016; 138(5): 051005. https://doi.org/10.1115/1.4032967
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