Masticatory Muscles Activity in Sport Climbers

Masticatory muscle activity during teeth clenching is associated with changes in many physiological parameters throughout the body. Clenching can improve muscle activity, force production, rate of force development, and joint fixation. Hence, teeth clenching and masticatory muscle activity can be important in competitive sports activities. Sport climbing is becoming increasingly popular and will be included for the first time in the Summer Olympic Games, Tokyo, 2020. However, masticatory muscle activity in sport climbers has not yet been studied. The aim of the presented study is to compare the bioelectrical activity of the masticatory muscles in sport climbers and non-climbers in order to determine the relationship between these muscles and climbing activity. 44 subjects without masticatory system disorders (16 women and 28 men, average age 26.3) were divided into two groups of 22 sport climbers (8 women, 14 men, climbing experience >4 years), while 22 people (8 women, 14 men, with no regular sports activity) were assigned to the control group. Electromyographic examination of temporalis anterior (TA) and masseter muscle (MM) was evaluated in three conditions: during resting mandibular position, during maximum intercuspation clenching, and during maximum voluntary clenching with cotton rolls between teeth. For statistical analysis, the W Shapiro-Wilk test and the Mann-Whitney U test were used. Sport climbers showed significantly higher bioelectrical activities of MM during maximum intercuspation clenching (238.45 μV vs. 83.87 μV, p = 0.002), and during maximum voluntary clenching with cotton rolls between teeth (300.01 μV vs. 101.38 μV, p = 0.001) compared to controls. The differences between groups in relation to the resting bioelectrical activity of the MM muscles, and TA muscles in all conditions were not statistically significant (p > 0.05). Higher bioelectrical activity of masseter muscles during clenching in climbers can be associated with this sports activity. However, the mechanism remains unknown and requires future research.

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The Relationship between Stress and Masticatory Muscle Activity in Female Students

Journal of Clinical Medicine ◽

10.3390/jcm10163459 ◽

2021 ◽

Vol 10 (16) ◽

pp. 3459

Author(s):

Grzegorz Zieliński ◽

Michał Ginszt ◽

Magdalena Zawadka ◽

Katarzyna Rutkowska ◽

Zuzanna Podstawka ◽

...

Keyword(s):

Perceived Stress ◽

Stress Level ◽

Muscle Activity ◽

High Stress ◽

Masticatory Muscles ◽

Female Students ◽

Bioelectrical Activity ◽

Masticatory Muscle ◽

The Relationship ◽

Masticatory Muscle Activity

The aim of the study was to analyze the relationship between stress measured by the perceived stress scale (PSS-10) questionnaire and masticatory muscle activity. Experimental design assumed the study of healthy young women without temporomandibular disorders, dividing them into three groups depending on the result of the stress level and then comparing these groups in terms of bioelectrical activity of the masticatory muscles. After the exclusion criteria were applied, 63 female students (mean age: 22.3 ± 2.4 years) from Medical University of Lublin were included in the study. The subjects were then divided into 3 groups: with low (n = 18), medium (n = 18) and high stress level (n = 27), according to PSS-10 results. Resting and functional activity of temporalis anterior (TA) and masseter (MM) muscles were measured by electromyograph BioEMG III. There were statistically significant effects of group on the absolute value of asymmetry index (AsI) of TA and MM during maximum voluntary clenching on dental cotton rollers (both p = 0.02). Post hoc analysis shows that there were statistically significant differences between medium and high stress groups in AsI TA (p = 0.01) and between low and high stress groups in AsI MM (p = 0.02). Perceived stress measured by PSS-10 questionnaire seems to be associated with changes in muscular asymmetry in functional clenching activity.

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Variation in Daily Masticatory Muscle Activity in the Rabbit

Journal of Dental Research ◽

10.1177/154405910408300111 ◽

2004 ◽

Vol 83 (1) ◽

pp. 55-59 ◽

Cited By ~ 23

Author(s):

G.E.J. Langenbach ◽

T. van Wessel ◽

P. Brugman ◽

T.M.G.J. van Eijden

Keyword(s):

Muscle Activity ◽

Radio Telemetry ◽

Masticatory Muscles ◽

Masticatory Muscle ◽

Peak Activity ◽

Space And Time ◽

Individual Variations ◽

Masticatory Muscle Activity

The daily use of masticatory muscles remains largely unclear, since continuous recordings were limited in space and time. This study’s purpose was to use radio-telemetry to examine daily muscle use and its inter- and intra-individual variations. A telemetric device was implanted into the rabbit masseter, and the transmitted signals were digitally stored for 7 days. Muscle use was analyzed by calculation of the total time each muscle was activated above 5, 20, and 50% of the day’s peak activity. Rabbits (n = 6) spent only 2% of the time chewing. Muscles were activated up to 20% of the total time at levels exceeding 5% of peak activity, and only about 0.5% of the time in forceful behaviors utilizing 50% of maximum contraction. It can be concluded that daily muscle use remained constant during succeeding days, but differed significantly among muscle regions and individuals.

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Brow and Masticatory Muscle Activity Senses Subjective Hedonic Experiences during Food Consumption

Nutrients ◽

10.3390/nu13124216 ◽

2021 ◽

Vol 13 (12) ◽

pp. 4216

Author(s):

Wataru Sato ◽

Akira Ikegami ◽

Sayaka Ishihara ◽

Makoto Nakauma ◽

Takahiro Funami ◽

...

Keyword(s):

Food Consumption ◽

Muscle Activity ◽

Physiological Activity ◽

Masticatory Muscles ◽

Physiological Data ◽

Masticatory Muscle ◽

Facial Electromyography ◽

Solid Foods ◽

Corrugator Supercilii ◽

Masticatory Muscle Activity

Sensing subjective hedonic or emotional experiences during eating using physiological activity is practically and theoretically important. A recent psychophysiological study has reported that facial electromyography (EMG) measured from the corrugator supercilii muscles was negatively associated with hedonic ratings, including liking, wanting, and valence, during the consumption of solid foods. However, the study protocol prevented participants from natural mastication (crushing of food between the teeth) during physiological data acquisition, which could hide associations between hedonic experiences and masticatory muscle activity during natural eating. We investigated this issue by assessing participants’ subjective ratings (liking, wanting, valence, and arousal) and recording physiological measures, including EMG of the corrugator supercilii, zygomatic major, masseter, and suprahyoid muscles while they consumed gel-type solid foods (water-based gellan gum jellies) of diverse flavors. Ratings of liking, wanting, and valence were negatively correlated with corrugator supercilii EMG and positively correlated with masseter and suprahyoid EMG. These findings imply that subjective hedonic experiences during food consumption can be sensed using EMG signals from the brow and masticatory muscles.

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Novel Functional Indices of Masticatory Muscle Activity

Journal of Clinical Medicine ◽

10.3390/jcm10071440 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1440

Author(s):

Michał Ginszt ◽

Grzegorz Zieliński

Keyword(s):

Muscle Activity ◽

Temporomandibular Disorders ◽

Activity Index ◽

Masticatory Muscles ◽

Healthy Adults ◽

Masticatory Muscle ◽

Symmetry Index ◽

Significant Difference ◽

Functional Indices ◽

Masticatory Muscle Activity

The aim of the present study was to analyze novel functional indices of masticatory muscle activity and compare them to existing and commonly used indices in patients with temporomandibular disorders (TMDs) and healthy adults. Based on the Research Diagnostic Criteria for Temporomandibular Disorders, 78 adult women qualified for the study. Subjects were divided into two groups: diagnosed TMDs (n = 36; mean age: 23.4 ± 2.6 years) and healthy adults (n = 42; mean age: 22.4 ± 2.3 years). Measurements of the bioelectric activity of the temporalis anterior (TA), superficial masseter (MM), and anterior bellies of the digastric muscle (DA) were carried out using the BioEMG III ™. Functional Clenching (FCI) and Functional Opening (FOI) indices were obtained as the ratio of the difference between the mean muscle root mean square (RMS) potentials during functional activity, including clenching (CL) and opening (MMO), and mean muscle resting (REST) potentials. Next, based on FCI and FOI indices, the Functional Clenching Activity Index (FCAI), Functional Clenching Symmetry Index (FCSI), and Functional Opening Symmetry Index (FOSI) were obtained. The statistical analysis showed significant differences in activity index left-sided (AcIL) and Activity index both-sided (AcItot) between TMDs and healthy women during rest measurements. The significant differences between both groups were noted in terms of all Functional Clenching Indices except Functional Clenching Index for MM right-sided (FCIMM-R). In all analyzed FCI indices, the control group showed higher values compared to the TMDs. Moreover, a significant difference between TMDs and controls was observed within Functional Clenching Activity Index left-sided (FCAIL) (14.56 vs. −0.45, p = 0.01). Both functional indices, and asymmetry (AsI) and activity (AcI) indices seem to be reliable in assessing symmetry and activity within masticatory muscles. Further studies should be performed to verify the effectiveness and suitability of the assessment of masticatory muscles using functional indices.

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Masticatory muscle activity in dentition with experimentally reduced occlusal contacts during mastication

Annals of Japan Prosthodontic Society ◽

10.2186/ajps.7.240 ◽

2015 ◽

Vol 7 (3) ◽

pp. 240-248

Author(s):

Shintaro Minami ◽

Masahiko Kikuchi ◽

Tomofumi Sakamoto ◽

Masaaki Iwamatsu

Keyword(s):

Muscle Activity ◽

Masticatory Muscle ◽

Masticatory Muscle Activity

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Evaluation of masticatory muscle activity in forced crossbites children with Asymmetry Index.

The Journal of Japanese Society of Stomatognathic Function ◽

10.7144/sgf.4.183 ◽

1998 ◽

Vol 4 (2) ◽

pp. 183-189 ◽

Cited By ~ 1

Author(s):

Shinobu Hasegawa ◽

Keiji Shinoda ◽

Yasuo Tamura ◽

Sadahiro Yoshida

Keyword(s):

Muscle Activity ◽

Asymmetry Index ◽

Masticatory Muscle ◽

Masticatory Muscle Activity

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FEATURES OF MANUFACTURE OF ADVANCED PROVISIONAL BRIDGE-BASED PROSTHESES

Art of Medicine ◽

10.21802/artm.2021.1.17.33. ◽

2021 ◽

pp. 33-37

Author(s):

А. В. Kostyshyn

Keyword(s):

High Efficiency ◽

Age Groups ◽

Masticatory Muscles ◽

Pathological Process ◽

Muscle Group ◽

Control Group ◽

Masticatory Muscle ◽

Orthopedic Treatment ◽

Group 2 ◽

Reinforcement Model

Abstract. The relevance of the topic is related to the need to improve methods of preparation of dentitions for orthopedic treatment, taking into account the defects of dentitions in patients with reduced occlusion height, taking into account the condition of the masticatory muscles and temporary use of plastic dentures, which provide gradual lifting of occlusion to normalize the masticatory group muscles and reorganization of myostatic reflexes. The aim of the research. Improving the effectiveness of preparation for orthopedic treatment of patients with partial tooth loss, with reduced occlusion height, by improving the design of a temporary bridge-based prosthesis. Materials and methods of research. We examined, treated and conducted clinical observation of 93 patients, who were divided into three groups according to the height of the reduction in occlusion, to achieve this goal and solve problems during the dissertation. Group 1 consisted of 32 patients with included dentition defects with reduced occlusion height up to 2 mm (n=32), group 2 - patients with included dentition defects with reduced occlusion height up to 2-4 mm (n=31), group 3 - these are patients with included dentition defects with reduced occlusion height up to 4-6 mm (n=30). All patients of the main groups belonged to the second and third age groups according to the WHO, aged 35-55 years. The control group (n=30) are young people who belonged to the 1st age group according to the WHO with intact dentition, without concomitant somatic and dental pathology, were admitted in one visit. Also, 123 fiberglass-reinforced plastic prostheses were made. Research results. When drawing up a plan for orthopedic treatment of patients with reduced occlusion height, we took into account possible complications, which are characterized by chipping of the facing material, pathological changes in the temporomandibular joint and masticatory muscle group. We have improved the method of manufacturing non-removable temporary plastic orthopedic constructions by reinforcing with fiberglass tapes and beams, to prevent them and gradually raise the bite. Expanded data on the dynamics of changes in myostatic reflexes and the effectiveness of the use of fixed orthopedic constructions, depending on the pathological process, the timing of adaptation of the masticatory muscle group to orthopedic constructions, according to the degree of reduction in occlusion height. The absence of complaints of breakage and other technical defects of the proposed temporary orthopedic constructions in 100% of cases, successfully allows to use it in the clinic of orthopedic dentistry. A new method of preparing patients for permanent orthopedic treatment by combined reinforcement of temporary non-removable bridge constructions with fiberglass tapes and beams is proposed, which differ in that after preliminary modeling of the frame of the bridge constructions, the technology of double reinforcement, model two support platforms with a step-like transition between them, in which fiberglass tapes and beams are fitted with dental tweezers, after which they are polymerized by the generally accepted method with a photopolymer lamp. Complete the modeling of the constructions and polymerize the prosthesis in the pneumopolymerizer with subsequent grinding and polymerize the prosthesis. Conclusion. The results of the research revealed the high efficiency of the improved method of manufacturing non-removable makeshift plastic of orthopedic constructions.

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