scholarly journals Pain and Intramuscular Release of Algesic Substances in the Masseter Muscle After Experimental Tooth-Clenching Exercises in Healthy Subjects

2013 ◽  
Vol 27 (4) ◽  
pp. 350-360 ◽  
Author(s):  
Andreas Dawson ◽  
Bijar Ghafouri ◽  
Bjöorn Gerdle ◽  
Thomas List ◽  
Peter Svensson ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Masseter Muscle ◽  
Tooth Clenching

Patterns of Experimentally Induced Pain in Pericranial Muscles

Cephalalgia ◽  
2006 ◽  
Vol 26 (5) ◽  
pp. 568-577 ◽  
Author(s):  
PT Schmidt-Hansen ◽  
P Svensson ◽  
TS Jensen ◽  
T Graven-Nielsen ◽  
FW Bach
Keyword(s):  
Healthy Subjects ◽  
Masseter Muscle ◽  
Analogue Scale ◽  
Pain Sensitivity ◽  
Sternocleidomastoid Muscle ◽  
Centre Of Gravity ◽  
Pressure Pain Thresholds ◽  
Before And After ◽  
Craniofacial Pain ◽  
Splenius Capitis

Nociceptive mechanisms in the craniofacial muscle tissue are poorly understood. The pain pattern in individual pericranial muscles has not been described before. Experimental muscle pain was induced by standardized infusions of 0.2 ml 1 M hypertonic saline into six craniofacial muscles (masseter, anterior temporalis, posterior temporalis, trapezius, splenius capitis and sternocleidomastoid) in 20 healthy subjects. The pressure pain thresholds (PPTs) were determined before and after infusions. The subjects continuously reported intensity of saline-induced pain on an electronic visual analogue scale (VAS) and the perceived area of pain was drawn on anatomical maps. The pain areas were measured and the localization determined by a new centre-of-gravity method. The PPTs were lowest on the sternocleidomastoid muscle (ANOVA: P < 0.001), but the saline-evoked VAS pain scored highest following injection into the masseter muscle (ANOVA: P < 0.05). The centre-of-gravity measures demonstrated significantly different localization of the pain areas (ANOVA: P < 0.001). The trigeminally vs. the cervically innervated muscles had significantly different patterns of spread and referral of pain according to trigeminally vs. cervically innervated dermatomes ( P < 0.005). In conclusion, there appear to be characteristic pain patterns and pain sensitivity in different craniofacial muscles in healthy volunteers, which may be of importance for further research on different craniofacial pain conditions.

A topographical analysis of spectral electromyographic data of the human masseter muscle under different functional conditions in healthy subjects

1994 ◽  
Vol 39 (5) ◽  
pp. 369-377 ◽  
Author(s):  
Nikolaus-Peter Schumann ◽  
Hans-Christoph Scholle ◽  
Christoph Anders ◽  
Elke Mey
Keyword(s):  
Healthy Subjects ◽  
Masseter Muscle ◽  
Topographical Analysis

scholarly journals The Effect of Microdialysis Catheter Insertion on Glutamate and Serotonin Levels in Masseter Muscle in Patients with Myofascial Temporomandibular Disorders and Healthy Controls

Diagnostics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 14 ◽  
Author(s):  
Ermira Bajramaj ◽  
Birgitta Häggman-Henrikson ◽  
Andreas Dawson ◽  
Björn Gerdle ◽  
Bijar Ghafouri
Keyword(s):  
Temporomandibular Disorders ◽  
Healthy Subjects ◽  
Masseter Muscle ◽  
Healthy Controls ◽  
Microdialysis Catheter ◽  
Microdialysis Probe ◽  
Orofacial Region ◽  
Group A ◽  
Tissue Trauma ◽  
Over Time

Myofascial temporomandibular disorders (TMD) are the most common cause of chronic pain in the orofacial region. Microdialysis has been used to study metabolic changes in the human masseter muscle. The insertion of the microdialysis probe causes acute tissue trauma that could affect the metabolic milieu and thereby influence the results when comparing healthy subjects to those with TMD. This study aimed to investigate the levels of serotonin and glutamate during the acute tissue trauma period in healthy subjects and in patients with TMD. Microdialysis was carried out in 15 patients with TMD and 15 controls, and samples were collected every 20 min during a period of 140 min. No significant alterations of serotonin or glutamate were observed over the 2 h period for the healthy subjects. For the TMD group, a significant decrease in serotonin was observed over time (p < 0.001), followed by a significant increase between 120 and 140 min (p < 0.001). For glutamate, a significant reduction was observed at 40 min compared to baseline. The results showed that there was a spontaneous increase of serotonin 2 h after the insertion of the catheter in patients with TMD. In conclusion, the results showed that there are differences in the masseter muscle levels of serotonin and glutamate during acute nociception in patients with myofascial TMD compared to healthy subjects.

A New Procedure for Assessment of Proprioception

1992 ◽  
Vol 74 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Bernd Leplow ◽  
Volkert Schlüter ◽  
Roman Ferstl
Keyword(s):  
Information Processing ◽  
Muscle Contraction ◽  
Healthy Subjects ◽  
Masseter Muscle ◽  
Muscle Activation ◽  
Muscle Spindles ◽  
Afferent Fibers ◽  
Afferent Information ◽  
Voluntary Muscle Contraction ◽  
Tendon Organs

A new method for the assessment of proprioception was developed and tested with 40 healthy subjects on two facial muscles (i.e., masseter and zygomatic muscles). The experiment was repeated after 3 1/2 months. In our study, proprioception was studied with respect to sensations arising from the muscle spindles and tendon organs. Therefore, myesthesia was investigated, which was assessed by the correspondence between a voluntary muscle contraction and its immediate replication. Good perception was defined by a small integral of differences, standardized by duration and intensity of the contraction, and its replication. Results show that this measure is independent of the characteristics of muscle activation. In concordance with our hypothesis, myesthesia was superior in a muscle richly supplied with muscle spindles and afferent fibers (i.e., masseter muscle), to that for a muscle less prepared for afferent information processing (i.e., zygomatus major).

The Effect of Tooth Clenching and Grinding on Anterior Temporalis Electromyographic Activity in Healthy Subjects

CRANIO® ◽  
2010 ◽  
Vol 28 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Mario Felipe Gutiérrez ◽  
Rodolfo Miralles ◽  
Aler Fuentes ◽  
Gabriel Cavada ◽  
Saúl Valenzuela ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Electromyographic Activity ◽  
Tooth Clenching ◽  
Anterior Temporalis
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