Assessment of Muscular Activity by Mechanomyogram(MMG)
Background and aims Recordings of electrical activity in the muscle and surface electromyography (EMG) have been widely used in the field of applied physiology. In parallel to recording of the EMG, the detectable low-frequency vibration signal generated by the skeletal muscle has been known and...
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| Format: | Article |
| Language: | fas |
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Iran University of Medical Sciences
2006-10-01
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| Series: | Salāmat-i kār-i Īrān |
| Subjects: | |
| Online Access: | http://ioh.tums.ac.ir/browse.php?a_code=A-10-1-46&slc_lang=en&sid=1 |
| _version_ | 1811293660575170560 |
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| author | M. Saffar Dezfuli SH. Mosaddad N. Koleini Mamaghani |
| author_facet | M. Saffar Dezfuli SH. Mosaddad N. Koleini Mamaghani |
| author_sort | M. Saffar Dezfuli |
| collection | DOAJ |
| description | Background and aims Recordings of electrical activity in the muscle and surface electromyography (EMG) have been widely used in the field of applied physiology. In parallel to recording of the EMG, the detectable low-frequency vibration signal generated by the skeletal muscle has been known and well documented. As the nature of the signal has been progressively revealed, the term of mechanomyography (MMG) has been proposed by a recent review. The main mechanism of the MMG generation has been considered to be sound pressure waves due to the dimensional changes, i.e., lateral expansion of the activated muscle fibres. Methods Low-frequency vibrations produced by muscle fibres are clearly distinguishable from the EMG, because MMG and EMG exhibit differences in response latency, spike duration, and frequency. During voluntary contraction at constant force the MMG frequency content does not change significantly. Results This suggests that the frequency of MMG signal is directly related to the absolute force level of the muscle, irrespective of fatigue phenomena. At low force contractions, in contrast to EMG signal, the changes in the amplitude content of the MMG are more consistent with muscle fatigue. This indicated that the amplitude of MMG signal might be recommended as a method to improve the objective and reliable detection of muscle fatigue induced by low force contraction. Conclusion MMG is most likely a valuable supplement to EMG as a non-invasive method to examine various aspects of muscle function including fatigue, electromechanical delay, muscle fibre type patterns, age related changes in muscular performance, muscle atrophy, and neuromuscular performance. |
| first_indexed | 2024-04-13T05:04:47Z |
| format | Article |
| id | doaj.art-bc2d64d783ef4b67bbdddf9264694a93 |
| institution | Directory Open Access Journal |
| issn | 1735-5133 2228-7493 |
| language | fas |
| last_indexed | 2024-04-13T05:04:47Z |
| publishDate | 2006-10-01 |
| publisher | Iran University of Medical Sciences |
| record_format | Article |
| series | Salāmat-i kār-i Īrān |
| spelling | doaj.art-bc2d64d783ef4b67bbdddf9264694a932022-12-22T03:01:12ZfasIran University of Medical SciencesSalāmat-i kār-i Īrān1735-51332228-74932006-10-01324Assessment of Muscular Activity by Mechanomyogram(MMG)M. Saffar DezfuliSH. MosaddadN. Koleini MamaghaniBackground and aims Recordings of electrical activity in the muscle and surface electromyography (EMG) have been widely used in the field of applied physiology. In parallel to recording of the EMG, the detectable low-frequency vibration signal generated by the skeletal muscle has been known and well documented. As the nature of the signal has been progressively revealed, the term of mechanomyography (MMG) has been proposed by a recent review. The main mechanism of the MMG generation has been considered to be sound pressure waves due to the dimensional changes, i.e., lateral expansion of the activated muscle fibres. Methods Low-frequency vibrations produced by muscle fibres are clearly distinguishable from the EMG, because MMG and EMG exhibit differences in response latency, spike duration, and frequency. During voluntary contraction at constant force the MMG frequency content does not change significantly. Results This suggests that the frequency of MMG signal is directly related to the absolute force level of the muscle, irrespective of fatigue phenomena. At low force contractions, in contrast to EMG signal, the changes in the amplitude content of the MMG are more consistent with muscle fatigue. This indicated that the amplitude of MMG signal might be recommended as a method to improve the objective and reliable detection of muscle fatigue induced by low force contraction. Conclusion MMG is most likely a valuable supplement to EMG as a non-invasive method to examine various aspects of muscle function including fatigue, electromechanical delay, muscle fibre type patterns, age related changes in muscular performance, muscle atrophy, and neuromuscular performance.http://ioh.tums.ac.ir/browse.php?a_code=A-10-1-46&slc_lang=en&sid=1MechanomyogramlectromyogramBiological signalContracting muscleFatigue |
| spellingShingle | M. Saffar Dezfuli SH. Mosaddad N. Koleini Mamaghani Assessment of Muscular Activity by Mechanomyogram(MMG) Salāmat-i kār-i Īrān Mechanomyogram lectromyogram Biological signal Contracting muscle Fatigue |
| title | Assessment of Muscular Activity by Mechanomyogram(MMG) |
| title_full | Assessment of Muscular Activity by Mechanomyogram(MMG) |
| title_fullStr | Assessment of Muscular Activity by Mechanomyogram(MMG) |
| title_full_unstemmed | Assessment of Muscular Activity by Mechanomyogram(MMG) |
| title_short | Assessment of Muscular Activity by Mechanomyogram(MMG) |
| title_sort | assessment of muscular activity by mechanomyogram mmg |
| topic | Mechanomyogram lectromyogram Biological signal Contracting muscle Fatigue |
| url | http://ioh.tums.ac.ir/browse.php?a_code=A-10-1-46&slc_lang=en&sid=1 |
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