Changes in jaw and neck muscle coactivation and coordination in patients with chronic painful TMD disk displacement with reduction during chewing

2021 ◽  
Vol 230 ◽  
pp. 113267
Author(s):  
Carlos Eduardo Fassicollo ◽  
Denny Marcos Garcia ◽  
Bárbara Cristina Zanandréa Machado ◽  
Cláudia Maria de Felício
Keyword(s):  
Neck Muscle ◽  
Disk Displacement

POSTURAL STABILITY IN PATIENTS WITH LATENT TRIGGER ZONES OF NECK MUSCULATURE

2019 ◽  
pp. 114-123
Author(s):  
E.R. Mukhametova ◽  
A.D. Militskova ◽  
T.V. Baltina
Keyword(s):  
Postural Control ◽  
Postural Stability ◽  
Test Group ◽  
Trigger Points ◽  
Control Group ◽  
Neck Muscle ◽  
Pressure Center ◽  
Cervical Muscles ◽  
Equilibrium Function ◽  
Romberg Test

There are many reasons for postural disorder development, but dysfunction of the cervical spine muscles is the most disputable reason. The purpose of the study is to reveal the influence of latent myogenic trigger zones of the cervical muscles on postural resistance. Materials and Methods. The authors used the method of computer posturography. Latent myogenic trigger zones (LMTZs) were determined by an indurated nodule or bundle in the neck muscle and by hyperesthesia in this zona. Assessment of postural resistance in subjects with LMTZs was carried out using standard posturography tests and Romberg test. Both classical and vector indicators were evaluated in a standard sample. Results. In fact, only vector indicators changed significantly in subjects with multiple LMTZs (4 or more). Thus, a decrease in the equilibrium function quality was established, as well as an increase in the average linear velocity of the pressure center and an increase in the normalized vectorogram area if compared with the indices in the control group and the group with sporadic LMTZs (from 1 to 3). The obtained results indicate a postural control decrease in individuals with multiple LMTZs. Subjects with sporadic LMTZs demonstrated a significant decrease in classical and a number of vector indicators, which shows the improvement in postural resistance in this test group. In Romberg test, all subjects with LMTZs, regardless of the zone number, showed an increasd Romberg coefficient. Conclusion. Multiple LMTZs of cervical muscles can reduce postural stability through increased afferentation from the cervical proprioreceptors. It is more obvious during in case of eye control elimination. Keywords: latent myogenic trigger points, postural control, posturography, Romberg test. Выделяют множество причин развития постуральных нарушений, среди которых дисфункция мышц шейного отдела позвоночника является наиболее спорной. Цель исследования. Выявить влияние латентных миогенных триггерных зон шейной мускулатуры на постуральную устойчивость. Материалы и методы. Использовался метод компьютерной стабилографии. Латентные миогенные триггерные зоны (лМТЗ) определялись по наличию в мышце шеи уплотненного узелка или пучка и по повышенной болевой чувствительности в этой области. Оценка постуральной устойчивости у испытуемых с лМТЗ осуществлялась с помощью стандартного стабилографического тестирования и теста Ромберга. В стандартной пробе оценивались как классические, так и векторные показатели. Результаты. Показано, что у испытуемых с множественными лМТЗ (4 и более) достоверно изменяются только векторные показатели. Так, установлено снижение качества функции равновесия, а также повышение средней линейной скорости центра давления и увеличение нормированной площади векторограммы по сравнению показателями в группе контроля и группе с единичными лМТЗ (от 1 до 3), что указывает на снижение постурального контроля у лиц с множественными лМТЗ. У испытуемых с единичными лМТЗ отмечено достоверное снижение классических показателей и ряда векторных, что свидетельствует об улучшении постуральной устойчивости в данной группе испытуемых. В пробе Ромберга все субъекты с лМТЗ независимо от количества последних показали повышение коэффициента Ромберга. Выводы. Множественные лМТЗ шейной мускулатуры могут снизить постуральную устойчивость через усиление афферентации от шейных проприорецепторов, что наиболее выражено при элиминации зрительного контроля. Ключевые слова: латентные миогенные триггерные точки, постуральный контроль, стабилография, тест Ромберга.

Effects of Break Schedule on Neck Muscle Fatigue

2020 ◽  
Vol 64 (1) ◽  
pp. 1207-1207
Author(s):  
Sarker P. ◽  
Norasi H. ◽  
Koenig J. ◽  
Hallbeck M.S. ◽  
Mirka GA.
Keyword(s):  
Muscle Fatigue ◽  
Neck Muscle ◽  
Neck Muscle Fatigue

scholarly journals Coordinated features in jaw and neck muscle activities induced by chewing of soft and hard gum in healthy subjects

2021 ◽  
Author(s):  
Tomohiro Ishii ◽  
Noriyuki Narita ◽  
Hiroshi Endo ◽  
Masanobu Wakami ◽  
Masakazu Okubo ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Neck Muscle

scholarly journals Comparison of the Abdominal Wall Muscle Thickness in Female Rugby Players Versus Non-Athletic Women: A Cross-Sectional Study

Medicina ◽  
2019 ◽  
Vol 56 (1) ◽  
pp. 8 ◽  
Author(s):  
Vanesa Abuín-Porras ◽  
Mónica de la Cueva-Reguera ◽  
Pedro Benavides-Morales ◽  
Rocío Ávila-Pérez ◽  
Blanca de la Cruz-Torres ◽  
...  
Keyword(s):  
Abdominal Wall ◽  
Female Athletes ◽  
Muscular Activity ◽  
Transversus Abdominis ◽  
Control Group ◽  
Neck Muscle ◽  
Cross Sectional ◽  
Sport Practice ◽  
Ultrasound Evaluation ◽  
Rugby Players

Background and Objectives: Rugby players engage in demanding, high loading muscular activity in the spine. Study of the abdominal wall architecture in female rugby athletes is relevant to the possible muscular asymmetry secondary to sport practice and the relationship between the abdominal wall and the pelvic floor muscles. Activation of the transversus abdominis (TrAb) generates an increase in the bladder neck muscle. Moreover, an increased interrecti distance (IRD) is related to urinary incontinence and has a higher prevalence in athletic women. The aim of the present study was to compare and quantify, with ultrasound imaging (USI), the thickness of the transversus abdominis (TrAb), external oblique (EO), internal oblique (IO), rectus abdominis (RA), and interrecti distance (IRD) in female rugby players versus non-athletic women in order to improve upon existing knowledge about abdominal wall configuration in female athletes. Materials and Methods: A sample of 32 women was recruited at the Universidad Europea Research Lab and divided in two groups: a rugby group (n = 16) and a non-athletic women group (n = 16). The thickness of the TrAb, EO, IO, RA, and IRD were assessed by USI in both groups. Results: There were statistically significant differences for the ultrasound evaluation thickness of the right TrAb (p = 0.011; d = 0.10), EO (p = 0.045; d = 0.74), IO (p = 0.003; d = 1.32), and RA (p = 0.001; d = 1.38) showing a thickness increase for the rugby group with respect to the control group. For the IRD thickness, there were no significant differences (p > 0.05) between groups. Conclusions: An increased TrAb, IO, EO, and RA thickness may be shown in female rugby players versus non-athletic women. Nevertheless, statistically relevant differences were not found for the IRD between both groups.

scholarly journals Suboccipital Muscles Injection for Management of Post-Dural Puncture Headache After Cesarean Delivery: A Randomized-Controlled Trial

2019 ◽  
Vol 7 (4) ◽  
pp. 549-552 ◽  
Author(s):  
Mhamed Abdelraouf ◽  
Maged Salah ◽  
Mohsen Waheb ◽  
Ahmed Elshall
Keyword(s):  
Cesarean Section ◽  
Dural Puncture ◽  
Controlled Trial ◽  
Demographic Data ◽  
Visual Analogue Score ◽  
Control Group ◽  
Neck Muscle ◽  
Rescue Analgesia ◽  
Post Dural Puncture Headache ◽  
Control Group Group

INTRODUCTION: Post-dural puncture headache (PDPH) is a common complication following neuraxial anaesthesia that increases the duration of hospital stay. AIM: This study aims to evaluate the effectiveness of injection of the dexamethasone-lidocaine mixture in suboccipital muscles treatment of PDPH after cesarean section. PATIENT AND METHODS: A group of 90 females with PDPH following cesarean section under spinal anaesthesia were randomly allocated into two equal groups: study group (Group S) and control group (group C). All patients received bilateral intramuscular (in the suboccipital muscle) (Group S) (n = 45) patients received lidocaine 40 mg (2 mL of 2% solution) and dexamethasone 8mg in a total volume of 4 mL; whilst, patients in the control group (group C) (n = 45) received 4 mL normal saline. The primary outcome is the Visual Analogue Score for a headache at 24 hours after injection. RESULTS: Demographic data and the baseline, headache score, neck muscle spasm, and nausea were comparable in both groups. Group S showed lower headache score compared to group C at all the post-injection time points. All patients in group S showed resolution of nausea after the intervention; while none of the control group showed any improvement. All patients of group C needed rescue analgesia; while only 6 (13.3%) patients in group S asked for an analgesic. Time to the first analgesic request was longer in group S compared to group C (10.17 ± 7.96 hours versus 1.00 ± 0.00 hours, P < 0.001). CONCLUSION: Ultrasound-guided injection of the dexamethasone-lidocaine mixture in suboccipital muscles is effective management of PDPH after CS.

EMG-Based Mobile Assessment System for Neck and Shoulder Fatigue

2017 ◽  
Vol 2 (2) ◽  
pp. 39-50
Author(s):  
Pei Lun Lai ◽  
Hsiu-Sen Chiang ◽  
Qi-An Huang
Keyword(s):  
Blood Circulation ◽  
Cervical Vertebrae ◽  
Memory Loss ◽  
Extended Period ◽  
Assessment System ◽  
Learning Ability ◽  
Neck Muscle ◽  
Neck And Shoulder Pain ◽  
Reducing Stress ◽  
Mobile Assessment

The neck and shoulders are the key channels for blood supply to the head. Bad blood circulation cannot only cause dizziness and headache but can also affect the vitality of brain cells and cognitive function. The neck muscles also provide all support for the head, and incorrect posture can put stress on the lower cervical vertebrae, accelerating joint wear and poor blood circulation, leading to hypoxia of neck muscle and tissue, and resulting in muscle fatigue and stiffness. Keeping the neck and shoulders rigid over an extended period, can produce neck and shoulder pain, dizziness and headache, and possibly even memory loss and short-term cognitive impairment, which can thus negatively impact learning ability and work efficiency. In this article, electromyography (EMG) characteristics were extracted through EMG analysis. Test subjects wore sensors while engaged in work or studying. The sensors retrieved EMG data which was then uploaded to a cloud-based platform for computation. A smartphone-based app then allowed users to monitor their own neck and shoulder fatigue in real time. Moreover, based on users' personal basic information, the system recommends personalized exercises to promote neck and shoulder relief, thus promoting comfort and reducing stress.

scholarly journals Reflex (unloading) and (defensive capitulation) responses in human neck muscle.

1996 ◽  
Vol 496 (2) ◽  
pp. 589-596 ◽  
Author(s):  
S Corna ◽  
Y Ito ◽  
M von Brevern ◽  
A M Bronstein ◽  
M A Gresty
Keyword(s):  
Neck Muscle

Stance- and Locomotion-Dependent Processing of Vibration-Induced Proprioceptive Inflow From Multiple Muscles in Humans

2007 ◽  
Vol 97 (1) ◽  
pp. 772-779 ◽  
Author(s):  
Grégoire Courtine ◽  
Alessandro Marco De Nunzio ◽  
Micaela Schmid ◽  
Maria Vittoria Beretta ◽  
Marco Schieppati
Keyword(s):  
Lower Limb ◽  
The Body ◽  
Whole Body ◽  
Neck Muscle ◽  
Muscle Vibration ◽  
Mapping Study ◽  
Body Mapping ◽  
Neck Muscle Vibration ◽  
Postural Changes ◽  
Postural Orientation

We performed a whole-body mapping study of the effect of unilateral muscle vibration, eliciting spindle Ia firing, on the control of standing and walking in humans. During quiet stance, vibration applied to various muscles of the trunk-neck system and of the lower limb elicited a significant tilt in whole body postural orientation. The direction of vibration-induced postural tilt was consistent with a response compensatory for the illusory lengthening of the stimulated muscles. During walking, trunk-neck muscle vibration induced ample deviations of the locomotor trajectory toward the side opposite to the stimulation site. In contrast, no significant modifications of the locomotor trajectory could be detected when vibrating various muscles of the lower as well as upper limb. The absence of correlation between the effects of muscle vibration during walking and standing dismisses the possibility that vibration-induced postural changes can account for the observed deviations of the locomotor trajectory during walking. We conclude that the dissimilar effects of trunk-neck and lower limb muscle vibration during walking and standing reflect a general sensory-motor plan, whereby muscle Ia input is processed according to both the performed task and the body segment from which the sensory inflow arises.

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