Mechanomyography is more sensitive than EMG in detecting age-related sarcopenia

Tian, Shuo; Liu, Yu; Li, Li; Fu, Weijie; Peng, Chieh Yu

doi:10.1016/j.jbiomech.2009.09.034

Cited by 28 publications

(23 citation statements)

References 33 publications

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“…Some authors 2,6,19 suggest that torque and angular velocities are directly related in eccentric action, with the inverse occurring for the concentric action. However, in the present study, no differences were observed between the torque values of the two velocities studied (i.e., 60 o /s and 120 o /s) which is in accordance with the literature which reports that angular velocity does not exert influence on force generation during concentric 23,37 and eccentric actions 2,7,16 . Concerning myoelectrical activity, Babault et al 36 , studying young subjects, observed a lower motor unit activation level during the concentric exercise at 60 o /s.…”

Section: Discussionsupporting

confidence: 93%

“…As well, the similarities observed in the torque and EMG activity, despite the two different velocities, could be also related to the aging process since it is accompanied by muscular fiber loss (mainly type II fibers) which is directly correlated to the EMG signal. This finding indicates that the lower firing rates of the motor units, resulting from age-related neuromuscular changes 37 , or the EMG signal was not sensible to identify this adaptations in older men during dynamic contractions 37,38 given the small differences between the two studied velocities.…”

Section: Discussionmentioning

confidence: 90%

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Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men

Quitério¹,

Melo²,

Takahashi³

et al. 2011

Rev. bras. fisioter.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 90%

Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men

Quitério¹,

Melo²,

Takahashi³

et al. 2011

Rev. bras. fisioter.

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“…Five studies focused on patients with spinal cord injuries [109][110][111][112][113], two on patients with Parkinson's disease [27,114] and with chronic obstructive pulmonary disease [115,116], one study on patients with myopathy [117]. The other six studies were conducted on healthy, able-body participants [20,28,30,[118][119][120].…”

Section: Mmg In the Rehabilitation Fieldmentioning

confidence: 99%

“…Tian et al [28] investigated the effects of age-related sarcopenia on the time-and frequency-domain properties of lower extremity muscles' MMG activities. Compared to the young subjects, the elderly had significantly less lean thigh volume, absolute and relative maximal force and power.…”

Section: Mmg In the Rehabilitation Fieldmentioning

confidence: 99%

“…The application fields of MMG are numerous and increasing: they span from the assessment of muscle function during isometric or dynamic contractions under different physiological conditions, such as fatigue [16][17][18], muscle temperature manipulation [19,20], stretching [21][22][23], ageing [24], training [25,26], to the analysis of the effects of rehabilitation programs [27,28], the development of prosthesis [29], and/or the use of the MMG as a triggering signal [30].…”

Section: Introductionmentioning

confidence: 99%

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Novel insights into skeletal muscle function by mechanomyography: from the laboratory to the field

2015

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Purpose The review aimed to provide a wider overview on the new application fields of MMG signal. A particular emphasis on measurements reliability and sensitivity was also given. Methods Five electronic databases were searched for eligible studies published between 2000 and 2014. Two authors assessed selected articles. Several domains (sensor types, participants' characteristics, experimental protocols, investigated muscle/s, measured parameters, and main results) were extracted for analysis. From a total of 1326 citations, 170 were selected for evaluation and 111 studies were identified. Results From the analysis of the literature it resulted that MMG signal (a) has a high level of reliability, especially for the parameters calculated during isometric contractions; (b) can be used to examine muscle mechanical activation and motor unit recruitment strategies under several types of exercise paradigms; (c) is influenced by the mechanical characteristics of cross-bridges and series elastic components, and may provide deeper insights into their behaviour under several physiological models; (d) could be a useful biomarker for triggering orthosis or multifunction access devices, and for the evaluation of patients presenting alterations in muscle function. Conclusions The MMG approach has been proficiently applied in several fields ascribable to both exercise physiology and clinical settings. This approach can provide deeper insights into muscle mechanical behaviour under several physiological models and for the evaluation of patients with altered muscle function.

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Portable acoustic myography - a realistic noninvasive method for assessment of muscle activity and coordination in human subjects in most home and sports settings

2013

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Muscle sound gives a local picture of muscles involved in a particular movement and is independent of electrical signals between nerve and muscle. Sound recording (acoustic myography) is a well-known noninvasive technique that has suffered from not being easily applicable, as well as not being able to register at sufficient sampling speed. With modern amplifiers and digital sound recording this has changed, and such assessment during movement outside a laboratory setting may be possible. Our aim was to develop a setup for muscle-sound assessment, which could be reliably applied in any local setting. A group of healthy subjects were assessed during standing, stair climbing, walking, and running. Piezoelectric microphones were applied to the skin using contact gel. A digital sound recorder enabled sampling speeds of around 96,000 Hz. Surface electromyography was measured in parallel as a comparison. The recorded signals were assessed and described in terms of signal frequency (Hz) and peak-to-peak amplitude (mV) using Chart software. Bioimpedance of the involved muscles was measured. Sound recording was shown to be an easy noninvasive method for assessment of muscle function during movement with the possibility of being applied in most clinical, sports, and home settings. Muscle sound gives a representation of the work of each muscle group during a complex movement, illustrated here by a step test, which revealed both concentric and eccentric activity. The method in the presented new setup has great potential for assessment of function in patients with musculoskeletal complaints in out-of-clinic settings, as well as in sports.

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Mechanomyography is more sensitive than EMG in detecting age-related sarcopenia

Cited by 28 publications

References 33 publications

Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men

Torque, myoeletric sygnal and heart rate responses during concentric and eccentric exercises in older men

Novel insights into skeletal muscle function by mechanomyography: from the laboratory to the field

Portable acoustic myography - a realistic noninvasive method for assessment of muscle activity and coordination in human subjects in most home and sports settings

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