Effects of masticatory muscle fatigue without and with experimental pain on jaw-stretch reflexes in healthy men and women

Selms, M.K.A. van; Wang, Kelun; Lobbezoo, Frank; Svensson, Peter; Arendt-Nielsen, Lars; Naeije, M.

doi:10.1016/j.clinph.2005.02.017

Cited by 20 publications

(14 citation statements)

References 43 publications

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“…In the present study, even though we attempted to solve this problem, Ang150ms was still signiWcantly higher in women but, fortunately, not to the extent to inXuence the reXex responses according to the ANCOVA results. The literature on this topic is mixed, showing shorter latencies and higher amplitudes in women for the jaw muscles (Peddireddy et al 2006;van Selms et al 2005), while no sex eVect was found for the triceps surae (Blackburn et al 2008) and quadriceps (Moore et al 2002). The available literature does not support an explanation based on diVerences in spinal stiVness.…”

Section: Between-group Evectsmentioning

confidence: 88%

The effect of sex and chronic low back pain on back muscle reflex responses

et al. 2010

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Different back muscle reflex assessment protocols have shown abnormally longer reflex latency responses of back muscles in chronic low back pain (CLBP). However, many confounding variables are difficult to control, such as the load magnitude and the preactivation of trunk muscles. The aims of this study were to evaluate, in 30 subjects with CLBP and 30 healthy controls, the activation levels of back muscles during pre-loading and their reflex responses to sudden loading. After subjected to six practice perturbations, 20 sudden and unexpected forward perturbations of the trunk were applied in 30 CLBP subjects (14 women) and 31 controls (17 women), while attempting to minimize the confounding effect of preactivation level and perturbation amplitude. Reflex latency and amplitudes were computed from the surface EMG signals of four back muscles (bilaterally at L5, L3, L1, T10 vertebral levels). EMG was also collected from abdominal muscles. Subjects with CLBP significantly increased the preactivation of back muscles (abdominal preactivation the same) relative to controls while no sex effect was observed. While adjusting statistically for these differences, reflex amplitude was significantly higher in subjects with CLBP and men, compared to healthy controls and women, respectively. Interestingly, contrary to most of the literature available, no between-group effects were detected for reflex latency, which could potentially be explained by an appropriate control of confounding variables, but this remains to be clarified in future research.

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Section: Between-group Evectsmentioning

confidence: 88%

The effect of sex and chronic low back pain on back muscle reflex responses

et al. 2010

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“…Two methods have been proposed for quantifying the excitatory part of the reflex. The first method uses the peak-to-peak amplitude of the biphasic potential appearing in the EMG signal, 4,[7][8][9][16][17][18][19][20][21][22][23][24] whereas the second uses only the first depolarizing peak. 5,[25][26][27][28] In the present study the first method was used for analysis of the data.…”

Section: Discussionmentioning

confidence: 99%

Normalization reduces the spatial dependency of the jaw‐stretch reflex activity in the human masseter muscle

et al. 2009

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The jaw-stretch reflex is the short-latency response in the jaw-closing muscles after a sudden stretch. The hypothesis whether normalization of the jaw-stretch reflex amplitude with respect to prestimulus electromyographic (EMG) activity will make the amplitude more independent of the location of the electrodes over the masseter muscle was tested. A 5 x 6 electrode grid was used to record the jaw-stretch reflex from 25 sites over the right masseter muscle of 15 healthy men. The results showed that there was a significant site dependency of the prestimulus EMG activity and the reflex amplitude. High cross-correlation coefficients were found between the spatial distribution of mean prestimulus EMG activities and reflex amplitude. When the reflex amplitude was normalized with respect to the prestimulus EMG activity, no site dependency was found. In conclusion, normalization of the jaw-stretch reflex amplitude by the prestimulus EMG activity strongly reduces its spatial dependency.

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“…On the other hand, skeletal muscle relaxants have very little effect on enhancement of the reflex that can be produced by experimental masseter muscle pain . Thus, the jaw‐stretch reflex may be more useful in assessing the integrity of the trigeminal sensory system, rather than as a biomarker of disease for TMD .…”

Section: Biomarker Candidates For Oro‐facial Painmentioning

confidence: 99%

Perspectives on next steps in classification of oro‐facial pain – Part 3: biomarkers of chronic oro‐facial pain – from research to clinic

Ceusters

Nasri-Heir

Alnaas

et al. 2015

J of Oral Rehabilitation

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The purpose of this paper is to review the current status of biomarkers used in orofacial pain conditions. Specifically, we critically appraise their relative strengths and weaknesses for assessing mechanisms associated with the orofacial pain conditions and interpret that information in light of their current value for use in diagnosis. In the third section, we explore biomarkers through the perspective of ontological realism. We discuss ontological problems of biomarkers as currently widely conceptualized and implemented. This leads to recommendations for research practice aimed to a better understanding of the potential contribution that biomarkers might make to orofacial pain diagnosis and thereby fulfill our goal for an expanded multi-dimensional framework for orofacial pain conditions that would include a third axis.

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Effects of masticatory muscle fatigue without and with experimental pain on jaw-stretch reflexes in healthy men and women

Cited by 20 publications

References 43 publications

The effect of sex and chronic low back pain on back muscle reflex responses

The effect of sex and chronic low back pain on back muscle reflex responses

Normalization reduces the spatial dependency of the jaw‐stretch reflex activity in the human masseter muscle

Perspectives on next steps in classification of oro‐facial pain – Part 3: biomarkers of chronic oro‐facial pain – from research to clinic

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