EMG-torque estimation of constant-posture, quasi-constant-torque contractions at varied joint angles

Author

Liu, Pu ; Liu, Lukai ; Martel, Francois ; Rancourt, Denis ; Clancy, Edward A.

Author_Institution

Worcester Polytech. Inst., Worcester, MA, USA

fYear

2011

fDate

1-3 April 2011

Firstpage

1

Lastpage

2

Abstract

This paper describes an experimental study which relates the simultaneous biceps/triceps surface electromyogram (EMG) of 12 subjects to elbow torque at seven joint angles during constant-posture, quasi-constant-torque contractions. Advanced EMG amplitude (EMGσ) estimation processors were investigated, and an EMG-torque model considering agonist and antagonist co-contractions was evaluated at each joint angle. Preliminary results show that advanced (i.e., whitened, multiple-channel) EMGσ processors lead to improved joint torque estimation and that the EMGσ torque relationship may only change by a scaling factor as a function of joint angle.

Keywords

biomechanics; electromyography; estimation theory; medical signal processing; torque; EMG torque estimation; EMGσ processors; biceps; constant posture; joint angle; joint torque estimation; quasiconstant torque contractions; surface electromyogram; triceps; Electromyography; Estimation; Joints; Muscles; Polynomials; Program processors; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference (NEBEC), 2011 IEEE 37th Annual Northeast

Conference_Location

Troy, NY

ISSN

2160-7001

Print_ISBN

978-1-61284-827-3

Type

conf

DOI

10.1109/NEBC.2011.5778635

Filename

5778635