Effect of experimental stress on masseter and temporalis muscle activity in human subjects with temporomandibular disorders

Katz, Jerald O.; Rugh, John D.; Hatch, John P.; Langlais, Robert P.; Terézhalmy, Géza T.; Borcherding, Steve

doi:10.1016/0003-9969(89)90116-7

Cited by 27 publications

(24 citation statements)

References 28 publications

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“…They also observed a slower return to baseline with the right masseter when poststress were compared to baseline measures. They replicated the findings of Moss and Adams (1983) and Katz et aL (1989) of no resting masseter baseline difference. Flor et aL (1992) reported heart rate differences and significant symptom-specific responding to the stressor.…”

Section: Discussionsupporting

confidence: 87%

“…MPD patients' baseline EMG levels were not significantly different from nonsymptomatic controls', and controls exhibited surprisingly greater average muscle activity. These results are contrary to current thinking about the primacy of baseline masseter muscle activity before the onset of a psychological or behavioral stressor (Yemm, 1969;Mercuri et al, 1979;Dahlstrom et al, 1985) and replicate reports of nonsignificant baseline EMG differences between MPD patients and controls (Moss and Adams, 1984;Katz et al, 1989;Flor et al, 1991).…”

Section: Discussioncontrasting

confidence: 86%

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Masseter muscle hyperactivity and myofascial pain dysfunction syndrome: A relationship under stress

1994

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Myofascial pain dysfunction syndrome (MPD) of the temporomandibular joint (TMJ) is a psychophysiological disorder that develops because of hyperactive muscles of mastication. Ten women meeting criteria for MPD and 12 symptom-free women participated in the study. The rationale for this study was to observe cardiovascular and masseter muscle changes during four contiguous experimental periods: baseline/adaptation, reaction time, recovery, and relaxation. MPD patients showed less masseter muscle activity and higher heart rates at baseline than controls. Controls had significantly higher masseter EMG activity during reaction time. Both groups showed significant elevation in masseter muscle activity and heart rate over the 14-min reaction period. MPD patients' recovery from stress was equivalent to controls' for both heart rate and masseter muscle activity. MPD patients exhibited significantly slower reaction times than controls. The results suggest that masseter muscle hyperactivity may not account for the development and maintenance of MPD.

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Section: Discussionsupporting

confidence: 87%

Section: Discussioncontrasting

confidence: 86%

Masseter muscle hyperactivity and myofascial pain dysfunction syndrome: A relationship under stress

1994

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“…It is suggested that psychologic and/or physical stress experienced by an individual leads to an increased activity in the masticatory muscles (41,42). The reactivity of the CMD patients to stress situations has been demonstrated as muscular hyperactivity, but it was not possible to show an increased BP reactivity due to possible daily life stressors in this group of patients with CMD of muscular origin.…”

Section: Ns Ns Ns Nsmentioning

confidence: 86%

Office and ambulatory blood pressure in patients with craniomandibular disorders

Abreu¹,

Nilner²,

Thulin³

et al. 1993

Acta Odontologica Scandinavica

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de Abreu TC, Nilner M, Thulin T, Vallon D. Office and ambulatory blood pressure in patients with craniomandibular disorders. Acta Odontol Scand 1993;51:161-170. Oslo. ISSN ooO1-6357.To assess the physiologic response to daily life stress in patients with craniomandibular disorders (CMD), office and ambulatory blood pressure and heart rate were studied in 25 female patients and 25 controls. Significant differences (p < 0.05) were found between the groups for heart rate before the clinical examination and that in the patient group when compared before and after the clinical examination. Higher values were found for mean daytime systolic and diastolic blood pressure in the control group compared with the patient group (p < 0.05). The mean number of systolic blood pressure a 140 mmHg during 24 h and daytime was significantly higher (p < 0.05) in the control group than in the patient group. In this study the CMD patients with muscular diagnosis were not more stressed than healthy subjects in the daily activities as evaluated by ambulatory blood pressure measurements.Heart rate; stress Maria Nilner,

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“…41 Subjects diagnosed with TMD have provided varying responses to stress, based on their typical responses to stressful stimuli. 43 In other words, anxious patients showed higher levels of muscular activity and emotional irritability during stress than did non-anxious patients.…”

Section: Hyperactivitymentioning

confidence: 98%

Clinical Use of Qualitative Electromyography in the Evaluation of Jaw Muscle Function: A Practitioner's Guide

Widmalm¹,

Lee²,

McKay³

2007

CRANIO®

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Effect of experimental stress on masseter and temporalis muscle activity in human subjects with temporomandibular disorders

Cited by 27 publications

References 28 publications

Masseter muscle hyperactivity and myofascial pain dysfunction syndrome: A relationship under stress

Masseter muscle hyperactivity and myofascial pain dysfunction syndrome: A relationship under stress

Office and ambulatory blood pressure in patients with craniomandibular disorders

Clinical Use of Qualitative Electromyography in the Evaluation of Jaw Muscle Function: A Practitioner's Guide

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