scholarly journals Evaluation of silent period on masticatory cycles of different muscles in dentate oral contraceptives users and nonusers

2015 ◽  
Vol 09 (02) ◽  
pp. 171-175
Author(s):  
Karina Helga Leal Turcio ◽  
Alício Rosalino Garcia ◽  
Paulo Renato Junqueira Zuim ◽  
Amália Moreno ◽  
Marcelo Coelho Goiato ◽  
...  
Keyword(s):  
Menstrual Cycle ◽  
Temporomandibular Disorders ◽  
Contraceptive Use ◽  
Silent Period ◽  
Reproductive Age ◽  
Menstrual Cycles ◽  
Oral Contraceptive Use ◽  
Significant Difference ◽  
The Right ◽  
Masseter Muscles

ABSTRACT Objective: The aim of this study was to evaluate the influence of oral contraceptive use on the silent period (SP) of anterior temporal and masseter muscles during the menstrual cycle. Materials and Methods: Totally, 28 women on reproductive age were selected including 15 nonusers of any hormone and 13 contraceptive users. All patients were dentate without muscular temporomandibular disorders. Electromyography (SP test) of the anterior temporal and masseter muscles was conducted every week during three consecutive menstrual cycles at 1st day of menstruation (P1), 7th day (P2), 14th day (P3) and 21st day (P4). Results: The SP values in the anterior temporal and masseter muscles were measured at both sides. The SP values of the right side (13.49 ms) at P2 were significantly different compared to the left side (12.28 ms). However, there was no significant difference on the interactions among the three factors. Conclusion: It can be concluded that the SP values in healthy women in reproductive age may not be influenced by the menstrual cycle with similar results for both muscles.

scholarly journals Stiffness of the Masseter Muscle in Children—Establishing the Reference Values in the Pediatric Population Using Shear-Wave Elastography

2021 ◽  
Vol 18 (18) ◽  
pp. 9619
Author(s):  
Cyprian Olchowy ◽  
Anna Olchowy ◽  
Aleksander Pawluś ◽  
Mieszko Więckiewicz ◽  
Luca Maria Sconfienza
Keyword(s):  
Shear Wave ◽  
Masseter Muscle ◽  
Pediatric Population ◽  
Shear Wave Elastography ◽  
Total Sample ◽  
Healthy Children ◽  
Significant Difference ◽  
The Right ◽  
The Impact ◽  
Masseter Muscles

In children, the quality and muscle function are altered in many pathologic conditions, including temporomandibular disorders. Although several methods have been used to evaluate muscle tonus, none became a golden standard. Moreover, the masseter muscle characteristics in children have not been investigated to date. This study aimed to measure the stiffness of the masseter muscle using shear-wave elastography in healthy children. We enrolled 30 healthy children (mean age 10.87 ± 3.38 years). The stiffness of masseter muscles was measured with shear wave elastography. Stiffness for the total sample was 6.37 ± 0.77 kPa. A comparison of the measurements did not show significant differences between the right and the left masseter muscles (left—6.47 ± 0.78 kPa; right—6.24 ± 0.76 kPa; p = 0.3546). A significant difference was seen between boys and girls (boys—5.94 ± 0.50 kPa; girls—6.63 ± 0.80; p = 0.0006). Shear-wave elastography is a promising diagnostic tool. It may help to detect changes in the stiffness of the masseter muscle and draw attention to pathological processes within the jaw muscles. Directions for further research shall include determining stiffness values in pathological conditions and the impact of biological and functional factors on the stiffness of the masseter muscle.

Cardiorespiratory Responses to Endurance Exercise Over the Menstrual Cycle and With Oral Contraceptive Use

2019 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Laura Barba-Moreno ◽  
Rocío Cupeiro ◽  
Nuria Romero-Parra ◽  
Xanne A.K. Janse de Jonge ◽  
Ana B. Peinado
Keyword(s):  
Oral Contraceptive ◽  
Menstrual Cycle ◽  
Endurance Exercise ◽  
Contraceptive Use ◽  
Cardiorespiratory Responses ◽  
Oral Contraceptive Use

Serum Levels of Relaxin during the Menstrual Cycle and Oral Contraceptive Use

1995 ◽  
Vol 39 (3) ◽  
pp. 197-200 ◽  
Author(s):  
Ullacarin Wreje ◽  
Per Kristiansson ◽  
Hans Åberg ◽  
Birgitta Byström ◽  
Bo von Schoultz
Keyword(s):  
Oral Contraceptive ◽  
Menstrual Cycle ◽  
Contraceptive Use ◽  
Serum Levels ◽  
Oral Contraceptive Use

Visual sensitivity across the menstrual cycle

2004 ◽  
Vol 21 (4) ◽  
pp. 513-531 ◽  
Author(s):  
ALVIN EISNER ◽  
SARA N. BURKE ◽  
MAUREEN D. TOOMEY
Keyword(s):  
Oral Contraceptive ◽  
Menstrual Cycle ◽  
Time Course ◽  
Light Adaptation ◽  
Contraceptive Use ◽  
Visual Sensitivity ◽  
Visual Adaptation ◽  
Hormonal Change ◽  
Menstrual Cycles ◽  
Sensitivity Change

This study was designed to evaluate the hypothesis that hormonal change can affect lower level light-adaptation processes, which are likely to be retinally based. Foveal visual sensitivities were measured across several menstrual cycles of four women not using hormonally acting medication and across several menstrual cycles of three women using a triphasic oral contraceptive. One woman, diagnosed with premenstrual syndrome (PMS), was a subject for both groups. Sensitivities were measured for a series of test wavelengths for 580-nm backgrounds of 2.0 and 4.0 log td. Of the six individuals tested, one had clear evidence of visual-adaptation changes occurring in phase with the menstrual cycle. Prior to using the oral contraceptive, this individual (the PMS subject) experienced changes of short-wavelength-sensitive (SWS)-cone-mediated sensitivities of up to about 1.4 log unit on the 4.0 log td background. Her SWS-cone-mediated sensitivities tended to be highest near ovulation and lowest premenstrually. Threshold-versus-illuminance (TVI) curves confirmed that the rate of sensitivity decrease with increasing background illuminance (i.e. the TVI slope) was greater premenstrually. The degree of background-induced desensitization within her middle-wavelength-sensitive (MWS)/long-wavelength-sensitive (LWS) cone pathways also appeared to vary cyclically, but the magnitude of the variation was smaller and the time course appeared to be different. When this subject began oral contraceptive use, the patterns of sensitivity change were all altered. None of the other five subjects experienced changes of SWS-cone-mediated vision that were cyclic and significantly adaptation-state dependent. However, there was evidence for a limited degree of cyclic adaptation change within the MWS/LWS cone pathways of at least one additional subject. We conclude that hormonal change can—for some unknown proportion of women—be linked to alterations of retinal function. However, the alterations are not the same for all visual pathways, and there are pronounced individual differences. The data also demonstrate that individuals' visual adaptation capabilities can vary substantially over periods of weeks.

scholarly journals The Influence of BMI Levels on Phases of the Menstrual Cycle and Presumed Ovulation

2012 ◽  
Vol 79 (4) ◽  
pp. 451-459
Author(s):  
Mary Grace Lasquety ◽  
Dana Rodriguez ◽  
Richard J. Fehring
Keyword(s):  
Body Mass Index ◽  
Menstrual Cycle ◽  
Odds Ratio ◽  
Luteal Phase ◽  
High Body Mass Index ◽  
Normal Weight ◽  
Menstrual Cycles ◽  
Significant Difference ◽  
Overweight Group ◽  
One Way Anova

Obesity and high body mass index (BMI) are known to be risks for anovulation and infertility. Little is known about how BMI levels affect parameters of the menstrual cycle. The purpose of this study was to determine the influence of BMI on parameters of the menstrual cycle and the likelihood for ovulation. The participants in this study were 244 women between the ages of twenty and fifty-four (mean thirty years) who charted from one to thirty-six menstrual cycles (mean seven cycles) for a total of 2,035 cycles. Urinary luteinizing hormone (LH) threshold tests were used to estimate the day of ovulation and the lengths of the follicular and luteal phases. The 244 participants were classified as normal weight with a BMI of 18.5–24.9 kg/m2 (N = 141), overweight with a BMI of 25–29.9 kg/m2 (N = 67), and obese with a BMI of 30 kg/m2 or greater (N = 36). One-way ANOVA indicated that there was a significant difference between groups in length of the luteal phase (F = 4.62, p < 0.01) and length of menses (F = 3.03, p < 0.05). Odds ratio indicated that the combined obese and overweight group was 34 percent less likely to have a positive detected urinary LH surge. We concluded that obesity might contribute to infertility by shortening the luteal phase and decreasing the probability of ovulatory menstrual cycles.

scholarly journals Development of a Novel Immunoassay for the Assessment of Plasma Gas6 Concentrations and Their Variation with Hormonal Status

2007 ◽  
Vol 53 (10) ◽  
pp. 1808-1813 ◽  
Author(s):  
Sylvain Clauser ◽  
Séverine Peyrard ◽  
Pascale Gaussem ◽  
Malvina Crespin ◽  
Joseph Emmerich ◽  
...  
Keyword(s):  
Oral Contraceptive ◽  
Oral Contraceptives ◽  
Contraceptive Use ◽  
Plasma Concentrations ◽  
Hormonal Status ◽  
Elisa Assay ◽  
Menstrual Cycles ◽  
Oral Contraceptive Use ◽  
Development And Validation ◽  
Time Point

Abstract Background: Gas6 is a vitamin K–dependent antiapoptotic protein that has been implicated in cardiovascular pathophysiology. We report the development and validation of an ELISA for Gas6, and the variation of plasma Gas6 with hormonal status in a study designed to evaluate the effect of oral contraception on plasma markers. Methods: After validation of the main stages of the ELISA assay, we measured plasma Gas6 concentrations in 94 male and 88 female healthy volunteers ages 18 to 38 years. Forty-five of the women then received an oral contraceptive, which contained ethinylestradiol and levonorgestrel, for 3 months before a new measurement was performed at the same time point in their menstrual cycles. Results: Interassay imprecision was 5.8%–11.8%, and the detection limit was 5.9 μg/L. Mean Gas6 plasma concentrations were significantly lower in men (52.0 μg/L) than in women not receiving oral contraceptives (63.8 μg/L, P &lt;0.001). In the women who received oral contraceptives, Gas6 concentrations decreased after 3 months of therapy from 63.6 μg/L to 51.9 μg/L (P &lt;0.001). Conclusions: We have developed a simple and reproducible ELISA assay for measuring plasma Gas6 concentrations, which vary with sex and are decreased by oral contraceptive use. These results suggest regulation of plasma Gas6 concentrations by sex hormones. Future clinical studies may require participants to be stratified by sex.

scholarly journals Is body mass index associated with irregular menstruation: A questionnaire study?

2020 ◽  
Author(s):  
Yunhui Tang ◽  
Yan Chen ◽  
Hua Feng ◽  
Chen Zhu ◽  
Mancy Tong ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Menstrual Cycle ◽  
Blood Loss ◽  
Body Mass ◽  
Odds Ratio ◽  
Normal Weight ◽  
Menstrual Blood ◽  
Menstrual Blood Loss ◽  
Menstrual Cycles ◽  
Significant Difference

Abstract Background: Irregular menstrual cycles including the length of cycles and menses, and heavy menstrual blood loss are linked to many gynaecological diseases. Obesity has been reported to be associated with irregular menstrual cycles. However, to date, most studies investigating this association are focused on adolescence or university students. Whether this association is also seen in adult women, especially women who had a history of birth has not been fully investigated. Methods: Questionnaire data were collected from 1012 women aged 17 to 53 years. Data on age, weight and height, gravida, the length of menstrual cycles and menses, and the number of pads used during menses were collected. Factors associated with menstrual cycle according to BMI categories were analysed.Results: There were no differences in the length of menstrual cycles and menses in women of different body mass index (BMI) groups. However, there was a significant difference in menstrual blood loss in women of different BMI categories. The odds ratio of having heavy menstrual blood loss in obese women was 2.28 (95% CL: 1.244, 4.193), compared to women with normal weight, while there was no difference in the odds ratio of having heavy menstrual blood loss in overweight, compared to normal weight, women. In contrast, the odds ratio of having heavy menstrual blood loss in underweight women was 0.4034 (95% CL: 0.224, 0.725), compared to women with normal weight. Conclusion: Although BMI was not correlated with the length of menstrual cycle and menses, BMI is positively associated with menstrual blood loss. Our data suggest that BMI influences menstrual blood loss in women of reproductive age and weight control is important in women’s reproductive years.

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