scholarly journals Special Issue: Sleep Bruxism—The Controversial Sleep Movement Activity

2020 ◽  
Vol 9 (3) ◽  
pp. 880
Author(s):  
Mieszko Wieckiewicz ◽  
Efraim Winocur
Keyword(s):  
Sleep Disorder ◽  
Movement Disorder ◽  
Muscle Activity ◽  
Sleep Bruxism ◽  
Current Approach ◽  
Masticatory Muscle ◽  
Healthy Individuals ◽  
Special Issue ◽  
Movement Activity ◽  
Masticatory Muscle Activity

According to the current approach [1], bruxism is considered as two different behaviours observed during sleep and wakefulness, respectively, and the single definition for bruxism has been replaced by two separate definitions: Sleep bruxism is a masticatory muscle activity during sleep that is characterised as rhythmic (phasic) or non-rhythmic (tonic) and is not a movement disorder or a sleep disorder in otherwise healthy individuals [...]

Relationships between cortical, cardiac, and arousal-motor activities in the genesis of rhythmic masticatory muscle activity across sleep cycles in primary sleep bruxism children

SLEEP ◽  
2021 ◽  
Author(s):  
Yuki Shiraishi ◽  
Masaya Tachibana ◽  
Ai Shirota ◽  
Ikuko Mohri ◽  
Masako Taniike ◽  
...  
Keyword(s):  
Rem Sleep ◽  
Muscle Activity ◽  
Sleep Bruxism ◽  
Beta Activity ◽  
Masticatory Muscle ◽  
Rhythmic Masticatory Muscle Activity ◽  
Motor Activities ◽  
Cyclic Changes ◽  
Masticatory Muscle Activity ◽  
Sleep Cycles

Abstract Study Objectives The present study aimed to clarify the physiological relationships between rhythmic masticatory muscle activity (RMMA) and cyclic changes in cortical, autonomic, and arousal-motor activities during sleep in sleep bruxism (SB) children. Methods Polysomnographic recordings were performed on fifteen SB children (9 boys, 6 girls, 10.3 ± 2.5 years) and eighteen control children (5 boys, 13 girls, 10.7 ± 3.1 years) free from sleep and developmental disorders. Sleep and RMMA were scored by the standard rules. Sleep cycle was divided into NREM and REM sleep segments and the frequency of RMMA, transient arousal and movement, and cortical and cardiac activities were then quantitatively analyzed in relation to sleep cycles. Results Neither sleep architecture nor sleep stage distribution of RMMA significantly differed between two groups. In sleep cycles, SB children showed more frequent RMMA in all segments than controls, while cyclic changes in cortical and autonomic activities did not significantly differ between two groups. In SB children, RMMA was the most frequent in the last NREM segment before REM sleep and was associated with increases in cortical beta activity and arousal; more than 70% of RMMA time-dependently occurred with cortical and motor arousals. Conclusions This is the first study to suggest that the potentiation of RMMA occurrence was associated with transient arousal under cyclic sleep processes in primary SB children.

Case Study for Monitoring the Rhythmic Masticatory Muscle Activity During Sleep Bruxism Episodes by Using Fiber Bragg Gratings

2019 ◽  
Vol 37 (18) ◽  
pp. 4823-4829
Author(s):  
Rodrigo Fiorin ◽  
Ana Paula G. O. Franco ◽  
Mauren Abreu de Souza ◽  
Danielle M. Fontenele ◽  
Ismael Luviseti G. Jones ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Sleep Bruxism ◽  
Masticatory Muscle ◽  
Rhythmic Masticatory Muscle Activity ◽  
Masticatory Muscle Activity

Neurobiological Mechanisms Involved in Sleep Bruxism

2003 ◽  
Vol 14 (1) ◽  
pp. 30-46 ◽  
Author(s):  
G.J. Lavigne ◽  
T. Kato ◽  
A. Kolta ◽  
B.J. Sessle
Keyword(s):  
Muscle Activity ◽  
Muscle Tone ◽  
Sleep Onset ◽  
Normal Subjects ◽  
Sleep Bruxism ◽  
Future Research ◽  
Masticatory Muscle ◽  
Airway Patency ◽  
Jaw Opening ◽  
Masticatory Muscle Activity

Sleep bruxism (SB) is reported by 8% of the adult population and is mainly associated with rhythmic masticatory muscle activity (RMMA) characterized by repetitive jaw muscle contractions (3 bursts or more at a frequency of 1 Hz). The consequences of SB may include tooth destruction, jaw pain, headaches, or the limitation of mandibular movement, as well as tooth-grinding sounds that disrupt the sleep of bed partners. SB is probably an extreme manifestation of a masticatory muscle activity occurring during the sleep of most normal subjects, since RMMA is observed in 60% of normal sleepers in the absence of grinding sounds. The pathophysiology of SB is becoming clearer, and there is an abundance of evidence outlining the neurophysiology and neurochemistry of rhythmic jaw movements (RJM) in relation to chewing, swallowing, and breathing. The sleep literature provides much evidence describing the mechanisms involved in the reduction of muscle tone, from sleep onset to the atonia that characterizes rapid eye movement (REM) sleep. Several brainstem structures ( e.g., reticular pontis oralis, pontis caudalis, parvocellularis) and neurochemicals ( e.g., serotonin, dopamine, gamma aminobutyric acid [GABA], noradrenaline) are involved in both the genesis of RJM and the modulation of muscle tone during sleep. It remains unknown why a high percentage of normal subjects present RMMA during sleep and why this activity is three times more frequent and higher in amplitude in SB patients. It is also unclear why RMMA during sleep is characterized by co-activation of both jaw-opening and jaw-closing muscles instead of the alternating jaw-opening and jaw-closing muscle activity pattern typical of chewing. The final section of this review proposes that RMMA during sleep has a role in lubricating the upper alimentary tract and increasing airway patency. The review concludes with an outline of questions for future research.

Sign in / Sign up

Export Citation Format

Share Document