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The influence of the sensitivity of the trapezius muscle on the changes within the bioelectric tensions of the masticatory muscles

Abstract

Introduction. Pathological muscle tone can cause changes in the facial skeleton, including tension headaches, tinnitus, temporomandibular joint dysfunctions. The complexity of pathologies and their spectrum may also indicate changes beyond the facial skeleton. The aim of the study was to determine the possible correlation between the pressure pain threshold of the trapezius muscle and the bioelectrical tension on the masticatory muscles.

Aim. The aim of the study was to determine the possible correlation between the pressure pain threshold of the trapezius muscle and the bioelectric tension on the masticatory muscles.

Material and methods. The number of 36 women applied for the study. They were all examined using an algometer within a trapezius muscle to determine the pressure pain threshold. The electromyographic study was carried out in accordance with the SENIAM guidelines. The resting activity of selected masticatory muscles (temporal and masseter) was recorded for 10 sec. The study involved an 8-channel BioEMG IIITM surface electromyography apparatus with BioPak Measurement System (BioResearch Associates, Inc. Milwaukee, WI, USA). Statistical analysis was carried out using the r-Pearson test. The level of significance was set at 5%.

Results. After comparing the bioelectric tension of the masticatory muscles and the pressure pain threshold, left-sided correlation was observed (p<0.05). Both in the right-hand and general comparison, the results did not reach the required level of statistical significance (p>0.05).

Conclusions. The pressure pain threshold seems to be linked to the bioelectrical muscle tone of the masticatory muscles. To confirm this observation, further research into a larger and more diverse group of participants is recommended.

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The need to improve screening and diagnostic methods in occupational irritant dermatitis

Abstract

Modern medicine has increasingly directed its interest towards discovering the etiology of occupational dermatitis, but unfortunately it is not completely elucidated. As with other occupational diseases, the presence of the exposure and the temporal relation between the exposure and the appearance of the characteristic signs is a defining element, but obtaining the information on the etiological factors is not always easy, therefore the attention must be directed to a systematic collection of these data. Clinical diagnosis is not sufficient, so additional paraclinical tests are needed for a complete diagnosis. Currently, more and more emphasis is being placed on experimental studies targeting the discovery of molecular or genetic markers that complement the idea of individual susceptibility in the appearance of contact dermatitis. As frequent as it is difficult to diagnose, occupational dermatitis is still a public health problem.

Open access
Difference in vertical jumping abilities, endurance and quickness of regeneration lower extremity muscle groups after physical effort between CrossFit and climbing athletes

, Köllner A, et al. Reproducibility of spatio-temporal and dynamic parameters in various, daily occurring, turning conditions. Gait Posture. 2015;41(1):307-12. 23. Mello RGT, Carri IR, da Matta TT, et al. Lumbar multifidus and erector spinae electromyograms during back bridge exercise in time and frequency domains. J Back Musculoskelet Rehabil. 2016;29(1):123-33. 24. Niederer D, Vogt L, Pippig T, et al. Local muscle fatigue and 3D kinematics of the cervical spine in healthy subjects. J Mot Behav. 2015;16:1-9. 25. Rainoldi A, Falla D, Mellor R, et al

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Ovarian cancer: early detection, angiogenesis, lymphangiogenesis and current prospects for therapy

;37:100-6. 8. Timmerman D, Van Calster B, Testa AC, et al. Ovarian cancer prediction in adnexal masses using ultrasound-based logistic regression models: a temporal and external validation study by the IOTA group. Ultrasound Obstet Gynecol. 2010;36:226-34 9. Testa A, Kaijser J, Wynants L, Fischerova, et al. Strategies to diagnose ovarian cancer: new evidence from phase 3 of the multicentre international IOTA study. Br J Cancer. 2014;111:680-8. 10. Van Calster B, Van Hoorde K, Valentin L, et al. Diagnosing ovarian cancer using the ADNEX risk

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Temporal effects of final action on the performance of the Portuguese men’s volleyball teams

Summary

Study aim: The purpose of this study was twofold: (i) to compare total attacks, points in the defense phase and attack efficiency between playing positions; and (ii) to identify the main predictors of overall volleyball teams’ success related to points made during the game.

Material and methods: 282 sets with a total of 33 174 actions and 8 231 points were analyzed. The study included 14 teams participating in the male First Division Portuguese Championship (53 games from the 2016/2017 season and 27 from the first phase of the 2017/2018 season, for a total of 80 matches).

Results: The most important parameters for the overall performance are efficacy of points in defense phase, aces, block points, and attack efficiency. Overall team performance variables statistically significantly predicted the total points of the team, F 16,1091 = 39.375, p < 0.001, R 2 = 0.366. Considering the comparisons between players’ performances, it was found that the setter had the lowest number of points in the defense phase and total attacks. Opposites had more total attacks and points in the defense phase than the other players (at a small-to-moderate magnitude).

Conclusion: The results revealed the importance of the efficacy of points in the defense phase, namely regarding the service action, block point, and attack efficiency, to improve the possibilities of winning.

Open access
Prevalence and factors associated with low back pain among Malaysian army personnel stationed in Klang Valley

Abstract

Study aim: The aims of this study were to examine the prevalence of low back pain (LBP) and explore possible factors associ­ated with LBP among Malaysian army personnel deployed in Klang Valley in the year 2018. Material and methods: A self-administered questionnaire on sociodemographic data, occupational background, occupational exposure and LBP evaluation was used in this study. A total of 330 respondents participated in this study and 321 (97%) of them completed and returned the questionnaires. Results: One hundred and fifty-seven respondents complained of LBP, giving a prevalence of 48.9%. LBP was found to be associated with smoking status, history of LBP, history of accident, military rank, category of regiment, lifting weights, push­ing weights, pulling weights and job-related physical activity. Logistic regression analysis identified four associated risk fac­tors of LBP: history of accident (OR = 4.42, 95% 2.29-8.55), history of LBP (OR=1.92, 95% 1.11-3.31), combat regiment (OR = 1.97, 95% 1.14-3.42) and high job-related physical activity (OR = 2.35, 95% 1.31-4.20). Conclusion: Almost half of Malaysian army personnel stationed in Klang Valley reported LBP symptoms. Smoking status, history of LBP, history of accident, junior non-commissioned officers (NCOs), combat regiments, manual handling of objects and moderate/high job-related physical activity are associated with LBP, but there is no evidence of a temporal relationship in the current study. Further exploration with a longitudinal study is needed to identify a cause and effect relationship between occupational exposure and LBP among Malaysian army personnel.

Open access
Reliability and Accuracy of Batak Lite Tests Used for Assessing Coordination Motor Abilities in Wrestlers

students . Moscow: Feniks. [in Russian] 5. Sadowski J., Gierczuk D. (2009). Correlations between selected coordination motor abilities and technical skills of Greco-Roman wrestlers aged 14-15. Archives of Budo 5, 35-39. 6. Gierczuk D., Ljach W. (2012). Evaluating the coordination of motor abilities in Greco-Roman wrestlers by computer testing. Human Movement 13(4), 323-329. 7. Juras G., Waśkiewicz Z. (1998). Temporal, spatial and dynamic aspects of coordination motor abilities . Katowice: AWF Katowice. [in Polish] 8. Raczek J., Juras G., Waśkiewicz Z. (2001

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Structure of Coordination Motor Abilities in Male Basketball Players at Different Levels of Competition

Abstract

Introduction. The purpose of this investigation was to examine the structure of coordination motor abilities (CMA) in male basketball players at different levels of competition. Material and methods. The study included 183 male basketball players from 10 Polish sports clubs. The examined groups consisted of seniors (n=42) aged 24.5 (± 3.3), juniors (n=37) aged 16.8 (± 0.6), cadets (n=54) aged 14.5 (± 0.1) and children (n=50) aged 13.4 (± 0.2). A battery of motor tests was administered to assess the following CMA: kinesthetic differentiation of movements, spatio-temporal orientation, reaction time, movement coupling, sense of balance, sense of rhythm and adjustment of movements. The structure of CMA under investigation was determined based on the results of Hotelling's principal component analysis in Tucker's modification, completed with Kaiser's Varimax rotation [1, 2]. Results. The CMA structure of basketball players was composed of three or four factors. Most often these included rhythm, movement differentiation, movement coupling and adjustment of movements. Less frequently the structure consisted of spatio-temporal orientation, balance and reaction time. An in-depth analysis of the CMA structure revealed that factors ranged from heterogeneous (children and cadets) to homogeneous ones (juniors and seniors). The distribution of identified factors in the common variance was the smallest in children and cadets (58.9% and 62.9%, respectively) and the biggest in juniors and seniors (69.3% and 68.48%, respectively).

Open access
Original research papers. Kinematic Characterisation of the Lunge and the Fleche in Epee Fencing: Two Case Studies

Abstract

Introduction. The aim of this study was to characterise the whole body dynamics and upper and lower joint kinematics during two common fencing steps: the lunge and the fleche. Material and methods. Two male competitive epee fencers were studied. Kinematics data were collected at 120 Hz (BTS Smart system) and ground reaction forces were measured at 120 Hz (Kistler platform). The resultant centre of gravity and end segment velocities were calculated. Temporal events were referenced to the horizontal ground reaction force. Time domain linear joint velocities were extracted. Results. At the whole-body level, the resultant centre of gravity velocity was higher during the fleche (2.64 and 2.89 m/s) than during the lunge (1.94 and 2.21 m/s). At the joint level, the wrist and elbow attained their peak velocities earlier than the proximal joint for both the lunge and the fleche for both athletes. Conclusions. The sequence of peak segmental velocities followed a distal to proximal sequence for both fencing steps.

Open access