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Simulation linking electro myographic power spectra to recruitment and rate coding


, : Simulation linking electro myographic power spectra to recruitment and rate coding. Computers in Biology & Medicine 9(3): 213-222

For muscles, a graded increase in motor unit size, with the number of fibers in the motor units forming an arithmetic progression, leads to a model consistent with experimental findings. This model was combined with electrical signal characteristics of activated muscle fibers, and the signal attenuation due to the spread of the electrical signal to bipolar surface electrodes. For the biceps brachii this electromechanical model links motor unit recruitment, rate coding and frequency shifts in the surface EMG power spectra. Motor unit degeneration results in an abnormally large high frequency EMG component.

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Related references

Guha, S.K.; Anand, S., 1979: Simulation linking EMG power spectra to recruitment and rate coding. Computers in Biology and Medicine 9(3): 213-221

Lindstrom L.; Magnusson R.; Petersen I., 1971: The dip phenomenon in power spectra of electro myographic signals. Electroencephalography & Clinical Neurophysiology 30(3): 259-260

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Cacioppo J.T.; Petty R.E.; Marshall Goodell B., 1984: Electro myographic specificity during simple physical and attitudinal tasks location and topographical features of integrated electro myographic responses. Integrated electromyographic (IEMG) activity was recorded using surface mini-electrodes placed over the corrugator supercilii, zygomatic major, levator labii superioris, masseter, obicularis oris and superficial forearm flexors muscle regions whil...

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Hilton Brown P.; Stalberg E., 1983: Motor unit size in muscular dystrophy a macro electro myographic and scanning electro myographic study. Patients with muscular dystrophy were investigated with macro-EMG [electromyography] to study activity from whole individual motor units, and with scanning EMG to study the distribution of activity within the motor unit. Macro motor unit potential...

Hilton Brown P.; Stalberg E., 1983: The motor unit in muscular dystrophy a single fiber electro myographic and scanning electro myographic study. Dystrophic muscle in patients shows increase in fiber density, abnormally low jitter in some recordings and more often increased jitter. The cross section of the motor unit has normal length. There are no signs of abnormal volume conduction charac...