Document Type

Article

Publication Date

2018

DOI

10.1097/JPO.0000000000000197

Publication Title

Journal of Prosthetics and Orthotics

Volume

30

Issue

3

Pages

132-139

Abstract

Introduction

Skillful object manipulation in various activities of daily living requires accurate and economical modulation of grip force, yet experimental studies investigating grip force using a prosthesis are lacking. The purpose of this study was to compare grip force output between two types of upper-limb prosthetic prehensors. We hypothesized a relationship between grip force output and the muscular tension needed to control the prehensor.

Materials and Methods

Ten able-bodied participants attempted to produce a static target grip force using a voluntary opening and voluntary closing prosthetic simulator and their anatomical hand. The target forces were 0.49 N, 4 N, and 10.5 N. Each target force was produced three times, with and without augmented visual feedback. Performance was evaluated for error and variability.

Results

Using the voluntary closing device resulted in more accuracy and less variability for two of the three grip forces and followed the same trends as the anatomical hand, both of which performed inversely to the voluntary opening device.

Conclusions

Compared with the voluntary opening prosthesis, there may exist a more intuitive compatibility between the muscle tension used to control cable tension of a voluntary closing prosthesis and the resulting grip force of the prehensor that may benefit performance on some tasks.

Comments

This is a pre-copyedited, author-produced version of an article accepted for publication in Journal of Prosthetics and Orthotics. The published version of record

Trujillo, M. S., Russell, D. M., Anderson, D. I., & Mitchell, M. (2018). Grip force control using prosthetic and anatomical limbs. Journal of Prosthetics and Orthotics, 30(3), 132-139.

is available online at: https://doi.org/10.1097/JPO.0000000000000197

ORCID

0000-0001-9130-1172 (Russell)

Original Publication Citation

Trujillo, M. S., Russell, D. M., Anderson, D. I., & Mitchell, M. (2018). Grip force control using prosthetic and anatomical limbs. Journal of Prosthetics and Orthotics, 30(3), 132-139. https://doi.org/10.1097/JPO.0000000000000197

Download

Share

COinS