Comparison of the fast Fourier transform and continuous wavelet transform for examining mechanomyographic frequency versus eccentric torque relationships

The purpose of this study was to compare the eccentric torque-related patterns for mechanomyographic (MMG) center frequencies (mean power frequency (MPF), median frequency (MDF), and average instantaneous mean power frequency (AIMPF)) determined by the fast Fourier transform (FFT) and continuous wavelet transform (CWT). Eight adults (mean+/-S.D. age=22.5+/-2.4 years) performed submaximal to maximal, eccentric isokinetic muscle actions of the biceps brachii on a Cybex 6,000 dynamometer. The mean MMG MPF, MDF, and AIMPF values for both the absolute and normalized data from 10 to 100% eccentric peak torque (PT) were highly intercorrelated at r=0.908-0.985. Linear models provided the best fit for the absolute MMG MPF (r=0.873), MDF (r=0.831), and AIMPF (r=0.924), as well as normalized MMG MPF (r=0.869), MDF (r=0.816), and AIMPF (r=0.920) versus percentage eccentric PT relationships. There were no significant differences (p>0.05) among the linear slope coefficients for the MMG MPF, MDF, and AIMPF versus percentage eccentric PT relationships for either the absolute or normalized data. These results suggested that Fourier or wavelet transform procedures can be used to examine the patterns of MMG responses during eccentric muscle actions of the biceps brachii.

[1]  P. Komi,et al.  Motor unit activation patterns during isometric, concentric and eccentric actions at different force levels. , 2003, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[2]  H P Clamann,et al.  Activity of single motor units during isometric tension , 1970, Neurology.

[3]  C Orizio,et al.  Muscle surface mechanical and electrical activities in myotonic dystrophy. , 1997, Electromyography and clinical neurophysiology.

[4]  Toshio Moritani,et al.  Mechanomyographic responses in human biceps brachii and soleus during sustained isometric contraction , 2004, European Journal of Applied Physiology.

[5]  D. Barry,et al.  Muscle sounds are emitted at the resonant frequencies of skeletal muscle , 1990, IEEE Transactions on Biomedical Engineering.

[6]  C. Orizio.  Muscle sound: bases for the introduction of a mechanomyographic signal in muscle studies. , 1993, Critical reviews in biomedical engineering.

[7]  Katsumi Mita,et al.  Mechanomyographic responses during voluntary ramp contractions of the human first dorsal interosseous muscle , 2003, European Journal of Applied Physiology.

[8]  A. Holbourn,et al.  The sounds from single motor units in a contracting muscle , 1948, The Journal of physiology.

[9]  Katsumi Mita,et al.  Time-frequency analysis of mechanomyogram during sustained contractions with muscle fatigue , 2004 .

[10]  Toshio Moritani,et al.  Characteristics of surface mechanomyogram are dependent on development of fusion of motor units in humans. , 2002, Journal of applied physiology.

[11]  T. Moritani,et al.  Assessment of lower-back muscle fatigue using electromyography, mechanomyography, and near-infrared spectroscopy , 2001, European Journal of Applied Physiology.

[12]  M. Akay,et al.  Analyzing surface myoelectric signals recorded during isokinetic contractions , 2001, IEEE Engineering in Medicine and Biology Magazine.

[13]  T. McMahon,et al.  The mechanism of low-frequency sound production in muscle. , 1987, Biophysical journal.

[14]  C. Orizio,et al.  Surface mechanomyogram reflects muscle fibres twitches summation. , 1996, Journal of biomechanics.

[15]  D T Barry,et al.  Fluid mechanics of muscle vibrations. , 1988, Biophysical journal.

[16]  Kenneth C. Mylrea,et al.  Investigation of Sounds Produced by Healthy and Diseased Human Muscular Contraction , 1986, IEEE Transactions on Biomedical Engineering.

[17]  T. Housh,et al.  Mechanomyographic amplitude and mean power frequency versus torque relationships during isokinetic and isometric muscle actions of the biceps brachii. , 2004, Journal of Electromyography & Kinesiology.

[18]  H Ramon,et al.  Validation of the wavelet spectral estimation technique in biceps brachii and brachioradialis fatigue assessment during prolonged low-level static and dynamic contractions. , 2004, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[19]  T J Housh,et al.  Mean power frequency and amplitude of the mechanomyographic and electromyographic signals during incremental cycle ergometry. , 2001, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[20]  T. R. Thompson,et al.  Recording sound from human skeletal muscle: Technical and physiological aspects , 1989, Muscle & nerve.

[21]  R. Perini,et al.  Muscular sound and force relationship during isometric contraction in man , 2006, European Journal of Applied Physiology and Occupational Physiology.

[22]  Anna Jaskólska,et al.  The effect of skinfold on frequency of human muscle mechanomyogram. , 2004, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[23]  J. Cram,et al.  Introduction to Surface Electromyography , 1998 .

[24]  A Kossev,et al.  Discharge pattern of human motor units during dynamic concentric and eccentric contractions. , 1998, Electroencephalography and clinical neurophysiology.

[25]  M. Stokes,et al.  Muscle sounds during voluntary and stimulated contractions of the human adductor pollicis muscle. , 1992, Journal of applied physiology.

[26]  T J Housh,et al.  Mechanomyographic time and frequency domain responses of the vastus medialis muscle during submaximal to maximal isometric and isokinetic muscle actions. , 2004, Electromyography and clinical neurophysiology.

[27]  H. Yack,et al.  Acoustic myography as an indicator of force during sustained contractions of a small hand muscle. , 1991, Journal of applied physiology.

[28]  E. Pedhazur.  Multiple Regression in Behavioral Research: Explanation and Prediction , 1982 .

[29]  M. Stokes,et al.  Acoustic Myography: Applications and Considerations in Measuring Muscle Performance , 1993 .

[30]  C. Orizio,et al.  The surface mechanomyogram as a tool to describe the influence of fatigue on biceps brachii motor unit activation strategy. Historical basis and novel evidence , 2003, European Journal of Applied Physiology.

[31]  T. Fukunaga,et al.  Non-uniform mechanical activity of quadriceps muscle during fatigue by repeated maximal voluntary contraction in humans , 1999, European Journal of Applied Physiology and Occupational Physiology.

[32]  B. Maton,et al.  Phonomyogram and electromyogram relationships with isometric force reinvestigated in man , 2004, European Journal of Applied Physiology and Occupational Physiology.

[33]  F Felici,et al.  Can Evoked Phonomyography Be Used to Recognize Fast and Slow Muscle in Man? , 1992, International journal of sports medicine.

[34]  E. Bichler,et al.  Mechanomyographic signals generated during unfused tetani of single motor units in the rat medial gastrocnemius muscle , 2001, European Journal of Applied Physiology.

[35]  Joseph P Weir,et al.  Comparison of Fourier and wavelet transform procedures for examining the mechanomyographic and electromyographic frequency domain responses during fatiguing isokinetic muscle actions of the biceps brachii. , 2005, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[36]  D. T. Barry,et al.  Time-frequency analysis of skeletal muscle and cardiac vibrations , 1996, Proc. IEEE.

[37]  T J Housh,et al.  Comparison of Fourier and wavelet transform procedures for examining mechanomyographic and electromyographic frequency versus isokinetic torque relationships. , 2005, Electromyography and clinical neurophysiology.

[38]  J. Basmajian.  Muscles Alive—their functions revealed by electromyography , 1963 .

[39]  O. Rioul,et al.  Wavelets and signal processing , 1991, IEEE Signal Processing Magazine.

[40]  C. Orizio,et al.  Spectral analysis of muscular sound during isometric contraction of biceps brachii. , 1990, Journal of applied physiology.

[41]  J. Hannerz,et al.  Discharge properties of motor units in relation to recruitment order in voluntary contraction. , 1974, Acta physiologica Scandinavica.

[42]  H. Devries,et al.  Mechanomyographic and electromyographic responses during submaximal cycle ergometry , 2000, European Journal of Applied Physiology.

[43]  D. Mealing,et al.  Vibromyographic recording from human muscles with known fibre composition differences. , 1996, British journal of sports medicine.

[44]  E. Bichler.  Mechanomyograms recorded during evoked contractions of single motor units in the rat medial gastrocnemius muscle , 2000, European Journal of Applied Physiology.

[45]  Katsumi Mita,et al.  Mechanomyogram and force relationship during voluntary isometric ramp contractions of the biceps brachii muscle , 2001, European Journal of Applied Physiology.

[46]  Kyle T Ebersole,et al.  Power Output, Mechanomyographic, and Electromyographic Responses to Maximal, Concentric, Isokinetic Muscle Actions in Men and Women , 2002, Journal of strength and conditioning research.

[47]  C Orizio,et al.  Spectral analysis of muscular sound at low and high contraction level. , 1988, International journal of bio-medical computing.

[48]  D. Mealing,et al.  Muscle Sound Frequency Analysis From Fast And Slow Twitch Muscle , 1991, Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991.

[49]  Jun Yu,et al.  Time-frequency analysis of myoelectric signals during dynamic contractions: a comparative study , 2000, IEEE Transactions on Biomedical Engineering.

[50]  P. Molenaar,et al.  Comparison between the Fourier and Wavelet methods of spectral analysis applied to stationary and nonstationary heart period data. , 2001, Psychophysiology.

[51]  T Moritani,et al.  The muscle sound properties of different muscle fiber types during voluntary and electrically induced contractions. , 1999, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[52]  D T Barry,et al.  Acoustic signals from frog skeletal muscle. , 1987, Biophysical journal.

[53]  M. Knaflitz,et al.  Analysis of myoelectric signals recorded during dynamic contractions , 1996 .