scholarly journals The Relationship between Stress and Masticatory Muscle Activity in Female Students

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.

scholarly journals Masticatory Muscles Activity in Sport Climbers

2020 ◽  
Vol 17 (4) ◽  
pp. 1378 ◽  
Author(s):  
Michał Ginszt ◽  
Grzegorz Zieliński ◽  
Aleksandra Byś ◽  
Piotr Gawda ◽  
Piotr Majcher
Keyword(s):  
Muscle Activity ◽  
Masticatory Muscles ◽  
The Body ◽  
Control Group ◽  
Bioelectrical Activity ◽  
Masticatory Muscle ◽  
Sports Activity ◽  
Sport Climbing ◽  
Teeth Clenching ◽  
Masticatory Muscle Activity

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.

Variation in Daily Masticatory Muscle Activity in the Rabbit

2004 ◽  
Vol 83 (1) ◽  
pp. 55-59 ◽  
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.

scholarly journals The Relationship Between Perceived Stress Level and Consumption of Fast Foods Among Female Students of Shahrekord University of Medical Sciences

2019 ◽  
Vol 6 (1) ◽  
pp. 30-35
Author(s):  
Zahra Karimi ◽  
Elahe Tavassoli ◽  
Akbar Babaei Heydarabadi
Keyword(s):  
University Students ◽  
Perceived Stress ◽  
Stress Level ◽  
Significant Relationship ◽  
Education Level ◽  
Female Students ◽  
Medical Sciences ◽  
Fast Foods ◽  
The Mean ◽  
The Relationship

Background and aims: Nowadays, with the advancement of science and technology, lifestyle has changed and fast foods are being commonly consumed. Due to their special circumstances, university students are susceptible to stress, anxiety, and bad nutritional patterns and, because of the consumption of high amounts of fat and salt and physical inactivity, are at increased risk of overweight and obesity. Therefore, the present research was conducted to study the relationship between the consumption of fast foods and perceived stress level among female students of Shahrekord University of Medical Sciences. Methods: The present research was a descriptive-analytical study conducted on female students of different faculties and majors in Shahrekord University of Medical Sciences in the academic year 2016-2017. From the study population, 152 students were selected as the samples using random cluster sampling method. Data were collected using a demographic information questionnaire (age, major, parents’ education level, education level, and place of residence), a standard 14-item scale for the measurement of perceived stress level, and a checklist to record the frequency of fast foods consumption in university and home or dormitory (daily, weekly, and monthly). Data analysis was conducted using descriptive and analytical tests (chi-squared, independent t test, and Spearman’s and Pearson’s correlation coefficients) in SPSS 18. Participation in the study was voluntary. Results: Results showed 45.4% of participants aged 18-20, 16.4% of whom were studying in public health, and 85.8% were BSc students. The mean scores of perceived stress and fast foods consumption were 51.36±13.52 and 12.42±5.42, respectively. There was a significant relationship between age and perceived stress (P=0.000), and between mother’s education level and perceived stress (P=0.011). There was no significant relationship between the mean score of perceived stress and fast foods consumption in participants (P=0.072) Conclusion: Considering the level of perceived stress and fast foods consumption in university students, it is necessary to apply effective patterns and theories of health education and promotion and also to direct attention to interpersonal and environmental factors to reduce stress and encourage healthy eating habits.

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

Nutrients ◽  
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.

scholarly journals Novel Functional Indices of Masticatory Muscle Activity

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.

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

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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