259
Views
10
CrossRef citations to date
0
Altmetric
Rapid Communication

Finger Coordination Under Artificial Changes in Finger Strength Feedback: A Study Using Analytical Inverse Optimization

, &
Pages 229-235 | Received 05 Dec 2010, Accepted 21 Feb 2011, Published online: 20 Apr 2011
 

ABSTRACT

A recently developed method of analytical inverse optimization (ANIO) was used to compute cost functions based on sets of experimental observations in 4-finger pressing tasks with accurate total force and moment production. In different series, feedback on total force and moment was provided using the index finger force at its value, doubled, or halved. Finger force data across different force–moment combinations formed a plane. This allowed reconstructing cost functions as 2nd-order polynomials with linear terms. Changes in the coefficients of the cost function across the 3 series allowed the authors to offer a biomechanical interpretation related to constraints on finger forces with different lever arms. ANIO allows the authors to describe preferred regions within the space of solutions for redundant tasks in terms of cost functions.

ACKNOWLEDGMENTS

This research was supported in part by NIH grants AG-018751, NS-035032, and AR-048563. The authors are grateful to Dr. Alexander Terekhov for his help at different phases of this project. They are also grateful to the anonymous reviewer for suggesting us the example considered in the Discussion section.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.