The Muscular Funct
The Muscular Function for Human
Knee Movement Revealed from Electromyography: A Preliminary Study
Y.-P. Sun1*,
K.-T. Yen1, H.-K. Kung1, Y.-C. Tsai1, K.-C. Lu1, C. M.
Du1, Y. C. Liang2
1Department of Mechanical Engineering, Cheng Shiu
University, TAIWAN, ROC
2Department of Aeronautics and Astronautics, R.O.C. Air
Force Academy, TAIWAN, ROC
*Corresponding author, E-mail: [email protected]
Abstract: The
electromyography (EMG) of a male teenager performing isokinetic exercise is
conducted to realize the characteristics of femoral muscles in human knee
movement. The raw EMG data of rectus femoris muscle and biceps femoris muscle
are full-wave rectified to demonstrate the electromechanical delay that ranges
from 50 to 100 ms. The mean of biceps femoris EMG in isokinetics knee flexion
is approximately 3-4 times as much as that of rectus femoris EMG in isokinetics
knee extension. The rectified EMG signals are smoothed by using moving average
method to receive a linear envelope that outlines the mean trend of EMG
signals. It gives a clear perspective to observe the relation between the
micro-scale EMG signal and the macro-scale kinetic data. This paper presents an
important basis to establish a mechanical model of muscle for human knee
movement.
[Y.-P. Sun, K.-T. Yen, H.-K. Kung, Y.-C. Tsai, K.-C. Lu, C. M. Du, Y. C.
Liang. The Muscular Function for Human Knee Movement Revealed from
Electromyography: A Preliminary Study. Life Sci J
2012;9(1):453-456] (ISSN:1097-8135).http://www.lifesciencesite.com. 67
Keywords electromyography, isokinetic exercise, rectus femoris,
biceps femoris, moving average Full Text 67
