Coherence of jaw and neck muscle activity during sleep bruxism

The aim of the present study was to establish the prevalence of sleep/awake bruxism among young students in Transylvania and to correlate the presence of this muscle activity with behavioral variations. This analytical, observational, cohort, cross-sectional, and prospective study involved 308 volunteers aged between 19 and 30 years of different nationalities, all students of the “Iuliu Hațieganu” University of Medicine and Pharmacy in Cluj-Napoca, Romania. Subjects were asked to complete an anonymous questionnaire which was structured in five sections. The results obtained from the questionnaires were analyzed separately for sleep bruxism and for awake bruxism. We did not find any statistically significant correlation between awake bruxism or sleep bruxism and age (p = 0.30 and p = 0.37, respectively), sex (p = 0.44 and p = 0.48, respectively), or nationality (p = 0.55 and p = 0.67, respectively). Only a high degree of stress and frustration (p = 0.035 and p = 0.020) was observed in European subjects except for the Romanians and the French, likely related to the difficulties of adapting to the language and lifestyle in Romania. Female sex was statistically significantly associated with an increased level of stress (p = 0.004), duty-related depression (p = 0.006), and duty-related anxiety (p = 0.003). Stress and anxiety can be favorable factors in the appearance of both types of bruxism; however, depression is associated only with awake bruxism.

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On-track Measurements in Motocross: The Correlation of Neck Muscle Activity and Contact Incidents of Helmet and Neck Brace

Procedia Engineering ◽

10.1016/j.proeng.2016.06.254 ◽

2016 ◽

Vol 147 ◽

pp. 613-617

Author(s):

Gerrit Thiele ◽

Patricia Kafka ◽

Stefan Litzenberger ◽

Anton Sabo

Keyword(s):

Muscle Activity ◽

Neck Muscle

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Attenuation of human neck muscle activity following repeated imposed trunk-forward linear acceleration

Experimental Brain Research ◽

10.1007/s00221-003-1466-9 ◽

2003 ◽

Vol 150 (4) ◽

pp. 458-464 ◽

Cited By ~ 64

Author(s):

Jean-Sébastien Blouin ◽

Martin Descarreaux ◽

Ariane Bélanger-Gravel ◽

Martin Simoneau ◽

Normand Teasdale

Keyword(s):

Muscle Activity ◽

Linear Acceleration ◽

Neck Muscle

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Could transient hypoxia be associated with rhythmic masticatory muscle activity in sleep bruxism in the absence of sleep-disordered breathing? A preliminary report

Journal of Oral Rehabilitation ◽

10.1111/joor.12323 ◽

2015 ◽

Vol 42 (11) ◽

pp. 810-818 ◽

Cited By ~ 23

Author(s):

I. E. Dumais ◽

G. J. Lavigne ◽

M. C. Carra ◽

P. H. Rompré ◽

N. T. Huynh

Keyword(s):

Muscle Activity ◽

Preliminary Report ◽

Sleep Disordered Breathing ◽

Sleep Bruxism ◽

Masticatory Muscle ◽

Rhythmic Masticatory Muscle Activity ◽

Masticatory Muscle Activity ◽

Disordered Breathing

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The Bruxoff Device as a Screening Method for Sleep Bruxism in Dental Practice

Journal of Clinical Medicine ◽

10.3390/jcm8070930 ◽

2019 ◽

Vol 8 (7) ◽

pp. 930 ◽

Cited By ~ 6

Author(s):

Klara Saczuk ◽

Barbara Lapinska ◽

Paulina Wilmont ◽

Lukasz Pawlak ◽

Monika Lukomska-Szymanska

Keyword(s):

Muscle Activity ◽

Dental Treatment ◽

Screening Method ◽

Video Camera ◽

Sleep Bruxism ◽

Control Group ◽

Asymptomatic Patients ◽

Group Data ◽

Screening Device ◽

Reliable Methods

Sleep bruxism (SB) is a masticatory muscle activity during sleep and a common phenomenon. Severe SB can have a serious impact on the success of dental treatment. Reliable methods of screening and diagnosing patients with SB are crucial. Therefore, in this study, a Bruxoff device as a potential screening and diagnostic method for sleep bruxism was evaluated. A total of 60 adults participated in this study: 35 patients with symptoms of bruxism (study group) and 25 asymptomatic patients (control group). Data were recorded using Bruxoff. All symptomatic patients participating in the study turned out to be bruxers, while not all asymptomatic patients turned out to be non-bruxers according to the Bruxoff device. Bruxoff is a simple screening device that can be safely used to evaluate masseter muscle activity during sleep. Since the device does not have a built-in microphone and/or video camera and, therefore, cannot record grinding sounds, the objective capabilities of Bruxoff as a single diagnostic device for sleep bruxism are limited.

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Head Movements and Neck Muscle Activity During Air Combat Maneuvering

Aerospace Medicine and Human Performance ◽

10.3357/amhp.5425.2020 ◽

2020 ◽

Vol 91 (1) ◽

pp. 26-31 ◽

Cited By ~ 1

Author(s):

Roope Sovelius ◽

Maunu Mäntylä ◽

Heini Huhtala ◽

Juha Oksa ◽

Rasmus Valtonen ◽

...

Keyword(s):

Muscle Activity ◽

Muscular Activity ◽

Head Movements ◽

Neck Muscle ◽

Activity Levels ◽

Sitting Posture ◽

Field Of Vision ◽

Air Combat ◽

The Difference ◽

Neutral Posture

BACKGROUND: The aim of the study was to determine the characteristics of cervical muscle activity in different head movements when using helmet mounted display in air combat maneuvering.METHODS: Cervical EMG was measured with eight F/A-18 pilots using the Joint Helmet Mounted Cueing System (JHMCS) during air combat maneuvering. In-flight Gz acceleration and continuous head position were recorded. Muscular activity was compared between head movements in isolation and combined with torso movement. In addition, the effect of the direction of head movements and the use of head support of the ejection seat on muscle activity was determined.RESULTS: Muscular loading increased in the cervical flexors and extensors when using the torso during targeting beyond the field of vision in the neutral sitting posture; the difference was significant in the flexors, but activity levels were higher in the extensors. Cervical muscles are loaded to a lesser extent if the head is kept in a stable position during Gz loading. Muscular activity in the neck muscles was higher when the pilot was moving the head out of neutral posture rather than toward neutral posture. The use of the headrest as a support decreased muscle activity in the extensors, but resulted in higher activity in the flexor muscles.DISCUSSION: All analyzed conditions were significantly affected by an increase in Gz. An increase of muscle activity with torso movements is considered as a positive factor as it reflects maintained muscular support for the cervical spine. Presented results may be helpful when specific conditioning programs and cockpit ergonomics are developed for fighter pilots.Sovelius R, Mäntylä M, Huhtala H, Oksa J, Valtonen R, Tiitola L, Leino T. Head movements and neck muscle activity during air combat maneuvering. Aerosp Med Hum Perform. 2020; 91(1):26–31.

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Improved neck posture and reduced neck muscle activity when using a novel camera based workstation for manual precision inspection tasks

Applied Ergonomics ◽

10.1016/j.apergo.2020.103147 ◽

2021 ◽

Vol 90 ◽

pp. 103147

Author(s):

Julia Gräf ◽

Klaus Mattes ◽

Kerstin Luedtke ◽

Bettina Wollesen

Keyword(s):

Muscle Activity ◽

Neck Muscle ◽

Precision Inspection ◽

Inspection Tasks

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Relationship Between Sleep, Neck Muscle Activity, and Pain in Cervical Dystonia

Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques ◽

10.1017/s0317167100038233 ◽

1996 ◽

Vol 23 (4) ◽

pp. 285-290 ◽

Cited By ~ 38

Author(s):

Frank Lobbezoo ◽

Marc Thu Thon ◽

Guy Rémillard ◽

Jacques Y. Montplaisir ◽

Gilles J. Lavigne

Keyword(s):

Muscle Activity ◽

Cervical Dystonia ◽

Nrem Sleep ◽

Spinal Pain ◽

Spasmodic Torticollis ◽

Controlled Study ◽

Emg Activity ◽

Neck Muscle ◽

Upper Trapezius ◽

Before And After

AbstractObjective: The interactions between sleep, neck muscle activity, and cervical spinal pain were examined in a controlled study with nine patients suffering from idiopathic cervical dystonia (ICD; also referred to as spasmodic torticollis), and nine gender- and age-matched controls. Methods: From each participant, two all-night polysomnograms with additional electromyographic recordings from the sternocleidomastoid and upper trapezius muscles were obtained. The first night was for habituation to the laboratory environment; the second night for experimental data collection. Visual analogue scales were used to collect intensity and unpleasantness ratings of cervical spinal pain before and after the second sleep recording. Results: None of the standard sleep variables showed statistically significant differences between average values of both groups of participants. However, a significantly larger variance in sleep latency was obtained for the ICD patients. In general, abnormal cervical muscle activity decreased immediately when lying down without the intention to go to sleep. Subsequently, abnormal muscle contractions were gradually abolished in all ICD patients during the transition from relaxed wakefulness to light NREM sleep. Following this transition phase, no more abnormal EMG activity was found in any of our patients. Finally, cervical spinal pain intensity and unpleasantness were reduced by about 50% overnight. Conclusions: Both supine position and sleep can be associated with an improvement of symptoms of ICD, and this disorder does not induce any sleep perturbations.

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