Changes in the power spectrum of the surface electromyogram of the human masseter muscle due to local muscular fatigue

Naeije, M.; Zorn, H.

doi:10.1016/0003-9969(81)90038-8

Cited by 47 publications

(21 citation statements)

References 15 publications

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“…The shift in the power spectrum of the surface EMG signal towards greater low-frequency energy content with muscle fatigue (Lindstrom et aI., 1970;Mills, 1982) has been used in numerous attempts to quantify jaw muscle fatigue in humans (Naeije & Zorn, 1981;Palla & Ash, 1981;Lindstrom & Hellsing, 1983;van Boxtel et aI., 1983;Naeije, 1984;Kroon et aI., 1986;Maton et aI., 1992). All of these studies show the familiar increase in low frequency content in the EMG signal during a variety offatiguing tasks yet, to be meaningful, any index of fatigue must consider force, and studies in which force has not been measured (Palla & Ash, 1981;Naeije & Zorn, 1981;van Boxtel et aI., 1983;Naeije, 1984;Kroon et aI., 1986) are difficult to interpret in terms of force-producing capacity. Clark and colleagues (1988) showed that increased low-frequency power in the masseter and temporalis EMG power spectrum during prolonged isometric biting was not accompanied by a reduction in MVC force.…”

Section: Physiological Data From Whole-muscle Studies In Humansmentioning

confidence: 97%

Fatigue of Jaw Muscles and Speech Mechanisms

Miles

Nordstrom

1995

Advances in Experimental Medicine and Biology

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Histochemical studies show that the distribution of fiber types in human jaw muscles is different from that in various limb muscles, no doubt representing different functional demands as well as a different embryological derivation. Jaw-closing muscles appear more resistant to fatigue than limb muscles with intermittent maximal contractions. Endurance of continuous isometric biting is limited by pain. Masseter motor unit fatigability in sub-maximal contractions is similar to the limb muscles. There are few physiological data for the jaw-opening muscles. The distribution of fiber types in human speech muscles is consistent with the high speeds of contraction that must be used in phonation. Although clinical syndromes of fatigue of speech muscles are recognized, there is little direct information on the fatigability of the muscle fibers themselves.

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Section: Physiological Data From Whole-muscle Studies In Humansmentioning

confidence: 97%

Fatigue of Jaw Muscles and Speech Mechanisms

Miles

Nordstrom

1995

Advances in Experimental Medicine and Biology

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“…The type of contraction and experimental conditions are also relevant factors. For example, reproducibility is improved if the subject can control the level of contraction through feedback (23, 33, 51, 56–58, 64, 65).…”

Section: Factors Of Influencementioning

confidence: 99%

Surface electromyography in the assessment of jaw elevator muscles

Castroflorio

Bracco

Farina

2008

J of Oral Rehabilitation

121

101

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Surface electromyography (EMG) allows the non-invasive investigation of the bioelectrical phenomena of muscular contraction. The clinical application of surface EMG recordings has been long debated. This paper reviews the main limitations and the current applications of the surface EMG in the investigation of jaw elevator muscles. Methodological factors associated with the recording of the surface EMG may reduce the reliability and sensitivity of this technique and may have been the cause of controversial results reported in different studies. Despite these problems, several clinical applications of surface EMG in jaw muscles are promising. Moreover, technological advances in signal detection and processing have improved the quality of the information extracted from the surface EMG and furthered our understanding of the anatomy and physiology of the stomatognathic apparatus.

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“…Decreases in the MF of the EMG power spectrum correlate well with, and are accepted as evidence of, muscle fatigue. 20,22,25) Surface EMG signals were obtained from the anterior temporalis muscle and masseter muscle with pre-gelled, silver/ silver chloride surface electrodes connected to the Nicolet …”

Section: Power Spectral Analysesmentioning

confidence: 99%

Gender Differences in Pressure Pain Thresholds during Sustained Jaw Muscle Contraction

Kim¹,

Kim²,

Chung

2014

Journal of Oral Medicine and Pain

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Purpose: To determine whether a fatiguing clench significantly affects the changes in pressure pain threshold (PPT) in men compared to women. Methods:The changes of PPTs from before to after a sustained clench in 12 men and 12 women were obtained. We used a decrease in median frequencies of surface electromyography (EMG) power spectra from the start to the end of the sustained clench as evidence of fatigue. Endurance time for the clench was used as a covariate. Results:The median frequencies decreased after the clench in both the anterior temporalis and masseter muscles, did not differ with the muscle or the gender of the subjects, and none of the interaction terms were significant. The PPTs were lower for women for both muscles, were decreased after the sustained clench, but failed to show the hypothesized gender by time interaction. Conclusions:Our results show that women have lower PPTs than men, but do not respond differently than men to jaw muscle fatigue. 18,19) but no attention was paid to the gender of the subjects.Based on reports where PPT responses of men and women were compared, 13,14) we hypothesized that muscle fatigue produced by a sustained clench and assessed by determining the shift in the median frequency (MF) of the power spectrum [20][21][22] would lead to a greater decrease in PPT in women than in men. Few data are available to support this hypothesis. 13) Therefore, we have replicated and extended this paradigm. In the present study we have taken into account the confounding problem of different endurance times for men and women of the sustained clench. Our aim was to determine whether a sustained clench significantly affects the changes in PPT in men compared to women.

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Changes in the power spectrum of the surface electromyogram of the human masseter muscle due to local muscular fatigue

Cited by 47 publications

References 15 publications

Fatigue of Jaw Muscles and Speech Mechanisms

Fatigue of Jaw Muscles and Speech Mechanisms

Surface electromyography in the assessment of jaw elevator muscles

Gender Differences in Pressure Pain Thresholds during Sustained Jaw Muscle Contraction

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