Experimentally verified model of mechanomyograms recorded during single motor unit contractions

Kaczmarek, Piotr; Celichowski, Jan; Kasiński, Andrzej

doi:10.1016/j.jelekin.2005.03.005

Cited by 15 publications

(14 citation statements)

References 19 publications

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“…1A. This remark has been partially supported already by the results obtained with the membrane model of the muscle presented in our previous paper (Kaczmarek et al, 2005).…”

Section: Introductionsupporting

confidence: 70%

“…Therefore, the muscle model should reflect both the local surface deformation caused by a single MU activity (Kaczmarek et al, 2005), the whole muscle displacement and shortening. For the sake of simplicity the muscle model of a medial gastrocnemius (MG) muscle of a rat has been described here with a muscle longitudinal cross-section (Fig.…”

Section: Modelling Issuesmentioning

confidence: 99%

“…This discrepancy can be explained by the fact that piezotransducer records pressure wave which reflects the muscle surface acceleration whereas the laser sensor records the muscle surface position. Moreover, it was shown (Kaczmarek et al, 2005) that the pressure wave recorded by the microphone was modified by the paraffin-oil medium, so the muscle surface displacement, which is the source of the pressure wave, cannot be easily computed. The experiments showed that three main types of the MMG signals correspond to the variable locations of MUs in a pennate muscle, additionally, relatively to a position of the laser distance sensor.…”

Section: Experiments In Vivomentioning

confidence: 99%

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The image of motor units architecture in the mechanomyographic signal during the single motor unit contraction: in vivo and simulation study

Kaczmarek

Celichowski

Drzymała‐Celichowska

et al. 2009

Journal of Electromyography and Kinesiology

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“…1A. This remark has been partially supported already by the results obtained with the membrane model of the muscle presented in our previous paper (Kaczmarek et al, 2005).…”

Section: Introductionsupporting

confidence: 70%

Section: Modelling Issuesmentioning

confidence: 99%

Section: Experiments In Vivomentioning

confidence: 99%

See 1 more Smart Citation

The image of motor units architecture in the mechanomyographic signal during the single motor unit contraction: in vivo and simulation study

Kaczmarek

Celichowski

Drzymała‐Celichowska

et al. 2009

Journal of Electromyography and Kinesiology

Self Cite

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“…Kaczmarek et al proposed a model of an MMG using a stiff finite-element method [5]. Their model could reproduce the MMG signals and twitch force, but it assumed that shortening of muscle fibers of a pennate muscle directly caused the deformation of the skin surface.…”

Section: Introductionmentioning

confidence: 99%

System identification of the mechanomyogram from single motor units during voluntary isometric contraction

Uchiyama

Hashimoto

2011

Med Biol Eng Comput

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A mechanomyogram (MMG) from single motor units of the anconeus muscle in voluntary isometric contraction was recorded from seven subjects using a spike-triggered averaging technique. The MMG system, in which the input was an ideal impulse and the output was the MMG detected with an acceleration sensor, was identified as the fifth-order model by the subspace-based state-space model identification method. The transfer function of the MMG system was factorized to the second- and the first-order models. The second-order model was compared to the standard form of the second-order model, and its resonance frequency was calculated. The resonance frequencies of the second-order models were 166 ± 61 and 93 ± 27 Hz, which were within the range of the values estimated from mechanical impedance in the literature. The equivalent mechanical model of the MMG system of the single motor unit was proposed on the basis of the fifth-order model. The model might be useful to evaluate the visco-elastic properties of the anconeus muscle.

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“…In the case of the MMG from a single motor unit, transducers attached to the skin have been used. As contact type transducers, microphones [13], piezoelectric sensors [14], and acceleration sensors [15] have all been previously used. An acceleration sensor is the smallest and lightest sensor among them.…”

Section: Discussionmentioning

confidence: 99%

System Identification of Mechanomyogram at Various Levels of Motor Unit Recruitment

Uchiyama

Tamura

2014

SICE Journal of Control, Measurement, and System Integration

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: The mechanomyogram from a single motor unit and the induced mechanomyogram at various levels of recruitment were measured with an acceleration sensor. The transfer functions between motor unit action potential (or electrical stimulation) and the mechanomyogram were identified using the singular value decomposition method. The purpose of this study is to clarify how the model order of the transfer function depends on the recruitment level. The second-to tenth-order transfer functions were calculated, and the difference between the observed and the estimated mechanomyograms using the transfer function, the fitness, was calculated. The relationship between the model order and the fitness was tested using the Holm-Bonferroni multiple comparison. At low levels (single motor unit, 20, and 40%) of recruitment, there were significant differences between the fourth-and higher-order models, but there were no significant differences between the fifth-and higher-order models. In contrast, at high levels (60, 80, and 100%) of recruitment, the fourth-order model did not show significant differences between the fifth-or higher-order models. As a result, the fifthand fourth-order models were appropriate at low and high recruitment levels, respectively. The differences in the order might be caused by interactions between active and resting motor units.

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Experimentally verified model of mechanomyograms recorded during single motor unit contractions

Cited by 15 publications

References 19 publications

The image of motor units architecture in the mechanomyographic signal during the single motor unit contraction: in vivo and simulation study

The image of motor units architecture in the mechanomyographic signal during the single motor unit contraction: in vivo and simulation study

System identification of the mechanomyogram from single motor units during voluntary isometric contraction

System Identification of Mechanomyogram at Various Levels of Motor Unit Recruitment

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