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https://www.readbyqxmd.com/read/28548304/delayed-onset-muscle-soreness-doms-does-not-influence-occlusal-sensitivity-and-position-sense-of-the-mandible
#1
Rosaria Bucci, Frank Lobbezoo, Ambrosina Michelotti, Christina Orfanou, Michail Koutris
BACKGROUND: Masticatory muscle-pain patients often complain about sensorimotor changes, but the effects of pain on the psychophysical properties remain unclear. This study aimed to investigate the effects of Delayed-Onset Muscle Soreness (DOMS) on the jaw's position sense (PS) and occlusal sensitivity (OS). METHODS: Twelve participants underwent intense concentric-eccentric jaw exercises. Self-reported muscle fatigue and pain, pain-free maximum mouth opening (MMO), pain pressure thresholds (PPTs) at right and left masseter and right and left anterior temporalis, maximum voluntary bite force (MVBF), PS, and OS were recorded before, immediately after, 24h, 48h, and one week after the exercises...
May 26, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28548212/an-electromyographic-study-on-the-sequential-recruitment-of-bilateral-sternocleidomastoid-and-masseter-muscle-activity-during-gum-chewing
#2
Shao-Xiong Guo, Bao-Yong Li, Yuan Zhang, Li-Juan Zhou, Lu Liu, Sven E Widmalm, Mei-Qing Wang
BACKGROUND: Mandibular functions are associated with electromyographic activity of the jaw muscles and also the sternocleidomastoid muscle (SCM). The precise spatiotemporal relation of SCM and masticatory muscles activities during chewing is worthy of investigation. OBJECTIVE: To analyze the sequential recruitment of SCM and masseter activities during chewing as indicated by the spatiotemporal locations of their activity peaks. METHODS: Jaw movements and bilateral surface electromyographic activity of SCM and masseter were recorded during gum chewing in 20 healthy subjects...
May 26, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28546639/shear-wave-elastography-parameters-of-normal-soft-tissues-of-the-neck
#3
Herman Jan, Zuzana Sedlackova, Jaromir Vachutka, Tomas Furst, Richard Salzman, Jaroslav Vomacka
BACKGROUND: Shear wave elastography is a relatively new method of quantitative measurement of tissue elasticity. Assuming that malignant lesions are stiffer than benign ones, elastography may provide supplementary information for their discrimination. However, potential confounding factors impacting tissue stiffness should be investigated first. AIMS: The objective of this study was to measure the stiffness of selected tissues of the head and neck in a normal population and to evaluate its relationship to age, sex, and body mass index...
May 25, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28539391/reevaluation-of-reflex-responses-of-the-human-masseter-muscle-to-electrical-lip-stimulation
#4
Paulius Uginčius, Gizem Yilmaz, Oguz Sebik, Kemal Sitki Turker
We examined the reflex response of the human masseter muscle to electrical stimulation of the lip using both single motor unit and surface electromyogram based methods. Using the classical analysis methods, reflex response to mild electrical stimuli generated two distinct short-lasting inhibitions. This pattern may reflect the development of combinations of short and long latency inhibitory postsynaptic potentials as a result of the mildly painful electrical lip stimulation. However, this pattern appearing in the classical analysis methods may have developed as a consequence of earlier responses and may not be genuine...
May 24, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28536904/efficacy-of-photobiomodulation-therapy-on-masseter-thickness-and-oral-health-related-quality-of-life-in-children-with-spastic-cerebral-palsy
#5
Maria Teresa Botti Rodrigues Santos, Karla Santos Nascimento, Simone Carazzato, Alina Oliveira Barros, Fausto Medeiros Mendes, Michele Baffi Diniz
The study aimed to evaluate the efficacy of photobiomodulation therapy (PBMT) on bilateral masseter muscle thickness and amplitude of mouth opening in children with spastic cerebral palsy (CP), and the impact on their oral health-related quality of life (OHRQOL). Three groups were included: experimental CP group (EG: n = 26 with oral complaints), positive control CP group (PCG: n = 26 without complaints), and negative control group (NCG: n = 26 without CP). In the EG, the masseter muscles on both sides were irradiated with an infrared low-level Ga-Al-As laser (λ = 808 ± 3 nm, 120 mW) using a 3 J/cm(2) energy dose per site, with a 20 s exposure time per site (spot area: 4 mm(2); irradiance: 3 W/cm(2); energy delivery per point: 2...
May 23, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28536763/acute-visual-loss-after-botulinum-toxin-a-injection-in-the-masseter-muscle
#6
Bo Young Chun, Su Yeon Kim
PURPOSE: Acute visual loss after facial injection of cosmetic materials is rarely reported. In this study, we report one patient who developed acute visual loss after an injection of botulinum toxin A for esthetic purposes. METHODS: A 43-year-old Korean woman presented with a decrease in visual acuity to 20/800 after an injection of botulinum toxin A in the masseter muscle. The visual field testing showed an inferior altitudinal defect, and fluorescein angiography revealed a delayed arm-retinal circulation time...
May 23, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28533075/transcutaneous-electrical-nerve-stimulation-tens-and-laryngeal-manual-therapy-lmt-immediate-effects-in-women-with-dysphonia
#7
Mariana de Cásisa Macedo Conde, Larissa Thaís Donalonso Siqueira, José Eduardo Vendramini, Alcione Ghedini Brasolotto, Rinaldo Roberto de Jesus Guirro, Kelly Cristina Alves Silverio
PURPOSE: This study aimed to verify the immediate effect of low-frequency transcutaneous electrical nerve stimulation (TENS) and laryngeal manual therapy (LMT) in musculoskeletal pain, voice quality, and self-reported signs in women with dysphonia. METHOD: Thirty women with behavioral dysphonia were randomly divided into the TENS group and the LMT group. All participants fulfilled the pain survey and had their voices recorded to posterior perceptual and acoustic analysis before and after intervention...
May 19, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28532571/age-and-sex-related-differences-in-masseter-size-and-its-role-in-oral-functions
#8
Chia-Shu Lin, Ching-Yi Wu, Shih-Yun Wu, Kai-Hsiang Chuang, Hsiao-Han Lin, Dong-Hui Cheng, Wen-Liang Lo
BACKGROUND: The masseter muscle plays a key structural and functional role in the stomatognathic system. Researchers' cumulative evidence has suggested that the variation in the size of a person's masseter muscle may be a critical factor related to individual differences in oral functions. However, researchers have not yet investigated systematically the effect of a person's age and sex on masseter muscle size and the association of masseter muscle size with other clinical metrics, including masticatory performance (MP) and salivary flow rate (SFR)...
May 20, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28520860/growing-patients-with-duchenne-muscular-dystrophy-longitudinal-changes-in-their-dentofacial-morphology-and-orofacial-functional-capacities
#9
Fabienne Egli, Sébastien Botteron, Catherine Morel, Stavros Kiliaridis
Aim: The aim of this study was to describe the longitudinal changes in facial morphology, dental arch alterations and oral functional capacities that occur in growing patients with Duchenne muscular dystrophy (DMD) in order to identify the effects of the progression of the disease. Subjects and Methods: Twelve DMD patients (6.5-17.5 years of age) and 12 matched controls were screened on two different occasions (T1 and T2), 2 years apart. Dental casts, lateral cephalometric radiographs, maximal posterior bite force and labial force were measured to determine changes in their functional capacities and dentofacial morphology...
May 17, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28512539/longitudinal-effects-of-rapid-maxillary-expansion-on-masticatory-muscles-activity
#10
Elena Di Palma, Michele Tepedino, Claudio Chimenti, Gianluca M Tartaglia, Chiarella Sforza
BACKGROUND: To investigate the modifications induced by rapid maxillary expansion (RME) on the electromyographic (EMG) activities of the anterior temporal and superficial masseter muscles, in patients without pre-treatment EMG alterations. MATERIAL AND METHODS: Twenty-one patients with unilateral posterior cross-bite selected from the orthodontic department of the University of L'Aquila (Italy), were enrolled. There was no control group in this study since each subject acted as a control of her/himself...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28501558/effects-of-prolonged-exposure-to-co2-on-behaviour-hormone-secretion-and-respiratory-muscles-in-young-female-rats
#11
J M Martrette, C Egloff, C Clément, K Yasukawa, S N Thornton, M Trabalon
Atmospheric CO2 concentrations increased significantly over the last century and continuing increases are expected to have significant effects on current ecosystems. This study evaluated the behavioural and physiological (hormone status, muscle structure) effects of prolonged CO2 exposure in young female Wistar rats exposed at 700ppm of CO2 during 6h a day for 15days. Prolonged CO2 exposure, though not continuous, produced significant disturbances in behaviour with an increase in drinking, grooming and resting, and a reduction in rearing, jumping-play and locomotor activity...
May 10, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28501454/masseteric-nerve-for-gracilis-muscle-re-innervation-in-unilateral-facial-palsy-impact-on-quality-of-life
#12
B Bianchi, A Ferri, V Poddi, M Bergonzani, G Pedrazzi, S Ferrari, E Sesenna
BACKGROUND: Unilateral established or congenital facial palsies are usually treated with neuromuscular transplantation to reanimate the impaired side of the face. One of the most debated points is the motor nerve to choose for the reinnervation of the transplant. Contra-lateral healthy facial nerve is usually preferred, but in selected cases motor nerve to masseter is considered a valuable option. However only a few clinical studies focused on quality of life in this subset of patients are available in literature...
April 7, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28500876/does-adjunctive-botulinum-toxin-a-reduce-pain-scores-when-combined-with-temporomandibular-joint-arthroscopy-for-the-treatment-of-concomitant-temporomandibular-joint-arthralgia-and-myofascial-pain
#13
Nick Thomas, Sharon Aronovich
PURPOSE: Currently, there is no standard of care for the treatment of refractory myofascial pain and concomitant temporomandibular joint (TMJ) arthralgia. This comparative study was conducted to determine the effectiveness of botulinum toxin A (Btx), as an adjunct to TMJ arthroscopy, in this patient population. MATERIALS AND METHODS: A retrospective cohort study was conducted of patients who underwent TMJ arthroscopy with (Btx group) or without (control group) intramuscular Btx for TMJ arthritis and refractory myofascial pain at the University of Michigan (Ann Arbor) from 2011 through 2014...
April 19, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28488622/family-with-ehlers-danlos-syndrome-combined-classic-and-vascular-type-with-rare-presentation-of-progressive-myopathy-and-unusual-association-of-severe-facial-and-trigeminal-motor-weakness
#14
A Nalini, N Devaraddi, N Gayathri, Chandrajit Prasad, V Preethish-Kumar, K Polavarapu, S Shantanu
We report the clinical, radiological, biochemical, muscle histology, and electron microscopic features of two members of a family with combined Ehlers-Danlos syndrome (EDS) [classic and vascular type] and progressive myopathy as the primary manifestation. A 35-year old lady presented with severe gluteal and thigh muscle pain and easy fatigability for 5 years. She developed weakness and wasting of pelvic and pectoral girdles and thighs for 3 years and severe neck flexor and truncal weakness for 6 months. She had a history of recurrent jaw dislocation, easy bruising with hyperpigmentation, hyperextensibility of joints, translucent skin, and papyraceous scars...
May 2017: Neurology India
https://www.readbyqxmd.com/read/28487744/atorvastatin-diltiazem-combination-induced-rhabdomyolysis-leading-to-diagnosis-of-hypothyroidism
#15
N D B Ehelepola, S M B Y Sathkumara, H M P A G S Bandara, K L R Kalupahana
Statins and hypothyroidism, independently, can rarely cause rhabdomyolysis. The combination of them especially with concurrent intake of drugs such as diltiazem increases the risk of rhabdomyolysis. Hashimoto's encephalopathy is a rare condition associated with Hashimoto's thyroiditis and some patients with that can present with a stroke like picture. An elderly male who has been on atorvastatin for three years and on diltiazem for a week presented with sudden onset inability to walk and confusion. On examination muscle tenderness was noticed and creatine kinase levels indicated rhabdomyolysis which we attributed to atorvastatin...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28484298/comparing-the-electromyographic-features-of-the-masseter-and-temporal-muscles-in-patients-with-full-mouth-implant-supported-fdps-and-natural-dentition
#16
Mahdieh Seifi, Davood Nodehi, Ahmad Ghahramanloo, Zahra Ahmadi, Azade Farhangnia, Morteza Saedi, Hamid Reza Mozaffari, Roohollah Sharifi
BACKGROUND: Due to increasing demands for a full mouth implant reconstructions and the fact that the most failures are associated with biomechanical complications, determining the effect of different occlusal patterns on these complications seems inevitable. The aim of this study is to compare affection of different occlusal designs in full mouth implant reconstructed patients on electromyographic activity of temporal and masseter muscles compared to natural dentition. METHODS: Thirty-two patients were included in this study, considering that 16 patients had natural dentition and the other 16 were full mouth implant reconstruction patients...
March 2017: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28483248/electromyographic-ratio-of-masseter-and-anterior-temporalis-muscles-in-children-with-and-without-temporomandibular-disorders
#17
Thaís Cristina Chaves, Aroldo Dos Santos Aguiar, Lilian Ramiro Felicio, Stella Maris Greghi, Simone Cecilio Hallak Regalo, Débora Bevilaqua-Grossi
OBJECTIVE: This study investigated differences in surface electromyography (sEMG) activity of the masseter and anterior temporalis muscles in children with and without temporomandibular disorders (TMD). PARTICIPANTS: Thirty-four children aged 8-12 years were recruited, comprising 17 children with TMD and 17 without TMD (control group [CG]). The children were quasi-matched for sex, age, weight, and height. sEMG data were obtained using Myosystem(®) Br-1 equipment with 12 channels to evaluate the bilateral masseter, anterior temporalis, and suprahyoid muscles...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28473771/hypertrophic-cardiomyopathy-cardiac-troponin-c-mutations-differentially-affect-slow-skeletal-and-cardiac-muscle-regulation
#18
Tiago Veltri, Maicon Landim-Vieira, Michelle S Parvatiyar, David Gonzalez-Martinez, Karissa M Dieseldorff Jones, Clara A Michell, David Dweck, Andrew P Landstrom, P Bryant Chase, Jose R Pinto
Mutations in TNNC1-the gene encoding cardiac troponin C (cTnC)-that have been associated with hypertrophic cardiomyopathy (HCM) and cardiac dysfunction may also affect Ca(2+)-regulation and function of slow skeletal muscle since the same gene is expressed in both cardiac and slow skeletal muscle. Therefore, we reconstituted rabbit soleus fibers and bovine masseter myofibrils with mutant cTnCs (A8V, C84Y, E134D, and D145E) associated with HCM to investigate their effects on contractile force and ATPase rates, respectively...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28467130/masseter-muscle-measurement-performed-by-ultrasound-a-systematic-review
#19
Ana Paula Oliveira Reis Durão, Aline Morosolli, Brown Jackie, Jacobs Reinhilde
OBJECTIVES: The aims of this study were to systematically review the existing scientific literature and evidence about (a) the validation of masseter muscle ultrasonography for accurate assessment of muscle thickness, and (b) the reproducibility of masseter muscle thickness measures. METHODS: An electronic literature search was conducted using determined keywords on specific databases. Preliminary search revealed 298 articles listed in Medline, Scopus and Web of Science...
May 3, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28462198/intramuscular-hemangiomas-on-the-masseter-muscle-and-orbicularis-oris-muscle-a-report-of-two-cases
#20
Il-Kyu Kim, Ji-Hoon Seo, Hyun-Young Cho, Dong-Hwan Lee, Jun-Min Jang, Joon Mee Kim, In Suh Park
Intramuscular hemangioma (IMH) is a rare vascular disease involving skeletal muscle, comprising only 0.8% of hemangiomas. About 10% to 15% of IMHs occur in the head and neck region, mostly involving the masseter muscle. IMH occurs mostly in childhood, but is often not found until unexpected enlargement, pain, or cosmetic asymmetry occurs in adulthood. Several non-surgical treatments including cryotherapy, sclerosant injection, and arterial ligature have been described, but complete surgical resection is the curative intervention...
April 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
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