• Methods: Surface electromyography (EMG) of the right and left masseter and temporalis muscles was performed in 126 undergraduate students at rest and at maximal voluntary contraction. (unicamp.br)
  • Clinical significance: Electromyography is a noninvasive exam which evaluates the masticatory muscle activity by facial application of electrodes on masseter and temporal muscles. (unimib.it)
  • Methods: This pilot study analyzed the masticatory performance using surface electromyography (sEMG) of masticatory muscles that measures both muscle strength and muscle tone at the bedside. (tmu.edu.tw)
  • Influence of different upper cervical positions on electromyography activity of the masticatory muscles. (thieme-connect.de)
  • Electroencephalography (EEG), electromyography (EMG) and electrocardiography (ECG) are the most well known techniques that measure the electrical potentials produced by neurons and muscle cells. (tue.nl)
  • He underwent myofunctional therapy before dental treatment and the masticatory muscles were evaluated by surface electromyography. (minervamedica.it)
  • Locations of the left temporalis muscle (asterisk) and left masseter muscle (arrow) are shown. (avma.org)
  • The deep portion of the temporalis muscle appears hypoattenuated with no contrast enhancement. (avma.org)
  • An irregular cap-like contour of the contrast-enhanced portion of the temporalis muscle (white arrow) is superficial to the edematous deeper portion of the temporalis muscle. (avma.org)
  • The pterygoid and masseter muscles have a heterogeneous enhancement pattern that is subtler than that of the temporalis muscle. (avma.org)
  • Photomicrograph of a temporalis muscle specimen from the dog in Figure 1 . (avma.org)
  • Computed tomography (CT) images revealed a bone density mass located in the region of medial and lateral pterygoid muscles on the right and temporalis muscle on the left. (uiindex.org)
  • Sudden contraction of temporalis muscle will result in coronoid fracture, which is rare. (intelligentdental.com)
  • In contrast, we found that the temporalis muscle was well developed, while conspicuous postorbital constrictions, postorbital processes, and superior temporal lines revealed a substantial orbital portion of this muscle. (conicet.gov.ar)
  • The temporalis muscle originates on the sides of the cranial vault, with its maximum extent marked either by a temporal line or by a sagittal crest. (johnhawks.net)
  • Although freezing may have less of an effect on the gross morphometric characteristics of the musculature than ethanol storage, slow freezing damages muscle microanatomy, and therefore, faster freezing and other modes of preservation such as formalin fixation and ethanol storage may be preferable. (ncsu.edu)
  • The relationship between the masticatory musculature and dietary ecology has been explored in a number of carnivoran lineages, including felids and the superfamily Musteloidea. (ncsu.edu)
  • Oscillatory joint mobilization in TMD may be effective in increasing mandibular range of motion and opening of the mouth, as well as in reducing TMJ pain and masticatory musculature. (bvsalud.org)
  • 34. Fernández-de-Las-Peñas C, Galán-Del-Río F, Alonso-Blanco C, Jiménez-García R, Arendt-Nielsen L, Svensson P. Referred pain from muscle trigger points in the masticatory and neck-shoulder musculature in women with temporomandibular disoders. (bvsalud.org)
  • Any one of these muscles can develop myofascial trigger points (MTrPs). (medscape.com)
  • Myofascial pain syndrome is the most common cause of TMD, characterised by trigger points of skeletal muscles in the masticatory region. (unich.it)
  • Long-term efficacy of onabotulinum toxin in treating persistent myofascial pain and masticatory muscles hypertone in an adolescent with bruxism. (ejpd.eu)
  • In chronic MMM there is atrophy of the jaw muscles, and scarring of the masticatory muscles due to fibrosis may result in inability to open the mouth (trismus). (wikipedia.org)
  • Symptoms of acute MMM include swelling of the jaw muscles, drooling, and pain on opening the mouth. (wikipedia.org)
  • This chapter represents a concerted attempt to provide the clinician with a comprehensive overview on the basic neurobiological mechanisms underlying the many different manifestations of jaw muscle pain and disorders. (springer.com)
  • The range of conditions varies from muscle pain being secondary to other diseases and conditions, to being the primary pain condition, i.e., there are no obvious causes or known etiological factors for the pain or dysfunction. (springer.com)
  • This chapter will aid in the diagnostic process and institution of appropriate therapy for masticatory muscle pain. (springer.com)
  • Aims: To investigate (1) differences in heart rate variability (HRV) indices between masticatory muscle pain (MMP) patients and pain-free controls at rest, during a stressor condition, and during a post-stressor recovery period, and (2) factors including psychological distress, social environment, and family-of-origin characteristics in the MMP sample compared to a pain-free matched control sample. (quintpub.com)
  • The massage of masticatory muscles alleviates pain in the head and jaw area. (mehilainen.fi)
  • Grinding your teeth at night and tension in the masticatory muscles during the day can cause pain in the head and jaw area. (mehilainen.fi)
  • [ 1 , 2 ] MTrPs are hyperirritable tender spots in palpable tense bands of skeletal muscle that refer pain and motor dysfunction, often to another location. (medscape.com)
  • The change in the masseter muscle dimensions was not correlated with the modification of pain. (unich.it)
  • We report the 7-year follow-up demonstrating the long-term efficacy of a single injection of onabotulinum toxin in masseters and temporalis muscles in order to treat masticatory pain and dysfunctions. (ejpd.eu)
  • According to the results of the five included studies manual therapy of the cervical spine has an effect on the pain threshold of the masticatory muscles and the subjective pain sensation. (thieme-connect.de)
  • Clinical management of masticatory muscle pain : An update of the recommendations. (qigonginstitute.org)
  • Temporomandibular joint abnormalities, facial pain, and masticatory muscle weakness also were common. (dentistrytoday.com)
  • Pain that affects the muscles, ligaments, tendons and bones found in the mouth, jaws and face. (agd.org)
  • With polymyositis, weakness, reluctancy to move and muscle pain are the main clinical signs. (vin.com)
  • Aim: This study aimed to verify the presence of generalized joint hypermobility (GHJ) in individuals with temporomandibular disorders (TMD) and asymptomatic individuals and to compare the activity of their masticatory muscles. (bvsalud.org)
  • Systematische Übersichtsarbeit Has Manual Therapy on the Cervical Spine an Effect on the Masticatory System and vice versa in Patients with Signs of Temporomandibular Disorders? (thieme-connect.de)
  • Patients with temporomandibular disorders have increased fatigability of the cervical extensor muscles. (thieme-connect.de)
  • The term temporomandibular disorders is an umbrella term for a group of musculoskeletal and neuromuscular conditions that involve the temporomandibular joint (TMJ), the masticatory muscles, and all associated structures. (msdmanuals.com)
  • Temporomandibular Dysfunction (TMD) is a set of disorders in- volving the masticatory muscles in the TMJ and associated structures. (bvsalud.org)
  • The treatment begins with massaging the muscles of the head and facial area. (mehilainen.fi)
  • His research in Ulm focusses on application of High-Density EMG for facial and masticatory muscles. (tue.nl)
  • A myopathy is a neuromuscular disease where the muscles fibres do not function as they should, and masticatory muscle myositis is one of many different forms of myopathy. (aquaticcommunity.com)
  • peripheral (nerve, neuromuscular junction and muscle). (vin.com)
  • Mild bruxism and tension in the masticatory muscles is very common. (mehilainen.fi)
  • Although several therapeutical options have been proposed to control bruxism-related muscle hyperactivity, there is not enough evidence to define a standard approach. (ejpd.eu)
  • Schematic of a trigger point complex of a muscle in longitudinal section.A: The central trigger point (CTrP) in the endplate zone contains numerous electrically active loci and numerous contraction knots. (medscape.com)
  • A taut band of muscle fibers extends from the trigger point to the attachment at each end of the involved fibers. (medscape.com)
  • Cross-sectional drawing shows flat palpation of a taut band and its trigger point.Left: Skin pushed to one side to begin palpation (A). The fingertip slides across muscle fibers to feel the cord-line texture of the taut band rolling beneath it (B). The skin is pushed to other side at completion of movement. (medscape.com)
  • Statistical analysis was performed to evaluate the effects of treatment on VAS and trigger point stimulation and on the length and width of the masseter muscle. (unich.it)
  • Oral physiology studies the functional occlusion system comprised of three major components: teeth, muscles and the temporomandibular joints. (occlusionconnections.com)
  • In the last sentence of their discussion, Stedman and colleagues advanced a provocative hypothesis: Not only did Homo have smaller jaws and teeth, but reducing the jaw muscles may have enabled the evolution of larger brain size. (johnhawks.net)
  • Diagnosis of MMM is through either biopsy of the temporalis or masseter muscles or the 2M antibody assay, in which blood serum of the possible MMM-dog is reacted with temporalis tissue of a normal dog, or both. (wikipedia.org)
  • B-By 24 hours after fasciotomy of the temporalis and masseter muscles, the nictitating membranes were no longer elevated and the masticatory muscle swelling was less severe. (avma.org)
  • Latent TrPs characteristically cause increased muscle tension and limit the stretch range of motion, which often escapes the patient's attention or is simply accepted. (medscape.com)
  • Often, it is necessary to consider and deal with the cause that activated the TrPs, to identify and correct any perpetuating factors (which often are different than what activated the TrPs), and to help the patient restore and maintain normal muscle function. (medscape.com)
  • RESULTS: The cerTMD showed higher number of active TrPs in the masticatory and cervical muscles, greater forward head posture, and more severe degenerative changes in the cervical spine than mTMD did. (ajou.ac.kr)
  • Cervical degeneration, particularly at level of second to third vertebra appeared to be linked to the development of active TrPs in the masticatory and cervical muscles. (ajou.ac.kr)
  • We present a case of pseudomalignant myositis ossificans involving medial pterygoid, lateral pterygoid, and temporalis muscles. (uiindex.org)
  • Masticatory muscle myositis, commonly abbreviated MMM, is an inflammatory disease the affects the jaws of the dog. (aquaticcommunity.com)
  • These factors directly caused the jaws to shrink and the masticatory muscles to weaken. (jawinner.com)
  • In this sense, the aids for strengthening the masticatory muscles and jaws are very suitable for parents who want to do everything to make their children achieve a more attractive smile. (jawinner.com)
  • A-On initial examination, the dog had bilaterally elevated nictitating membranes, an inability to adduct the mandible, and severely swollen masticatory muscles. (avma.org)
  • Approximately 50% of the variation in muscle density can be explained histologically by the average muscle fiber area and the average percent fiber area. (ncsu.edu)
  • In this study, we present a focused evaluation of the variation in muscle organization, integration, and architecture within two speciose primate families: the Callitrichidae and Lemuridae. (ncsu.edu)
  • We demonstrate that, within each lineage, several muscle functional groups exhibit substantial variation in muscle organization. (ncsu.edu)
  • Intraspecific and intrafamilial variation in primate forearm muscle architecture. (ncsu.edu)
  • Thus, little is known about intraspecific variation in forearm muscle fiber architecture in primates, and whether there are notable differences in these variables between closely related taxa. (ncsu.edu)
  • We also found that there is great variation in both the extent of separation and fusion of flexor digitorum superficialis and profundus, and in the extent of accessory extensors in most species of callitrichids and Saimiri, but no variation in the gross forearm muscle architecture within lemurids. (ncsu.edu)
  • For this, masticatory muscles were reconstructed and craniomandibular shape variation assessed. (conicet.gov.ar)
  • Variation in masticatory muscle activity during subsequent, submaximal clenching efforts. (bvsalud.org)
  • Intraoperative photographs of the dog in Figure 1 showing full-thickness incision of the temporalis fascia on the left side in a caudal to rostral direction (A) and bilateral fasciotomies of the temporalis muscles (B). (avma.org)
  • In the examination of the masticatory function, although most of the volunteers showed a bilateral chewing pattern, the frequency of this pattern was significantly lower in the hypermobility group (p=0.05). (scielo.br)
  • Also, the right temporal muscle showed higher activity in subjects with GJH and TMD compared with asymptomatic individuals without hypermobility (p=0.0248). (bvsalud.org)
  • In the last 10 years, several studies demonstrated the effectiveness and reproducibility of surface EMG in the objective evaluation of temporal muscle and masseter activity and how this evidence can bean interesting aid in dental clinical practice. (unimib.it)
  • In this case report, EMG was used to evaluate the temporal muscle and masseter activity immediately before, immediately after, and 4 months after the RPE protocol. (unimib.it)
  • Conclusions: For the population of undergraduate students, there is no evidence that the presence and severity of TMD influence the EMG activity of masseter and temporalis muscles and the muscle asymmetry index at rest and maximal voluntary contraction. (unicamp.br)
  • The activity of the left masseter muscle was significantly higher (p=0.0072) in the volunteers with TMD and GJH compared with in the individuals with TMD but without hypermobility. (bvsalud.org)
  • Aim and objective: The purpose of this work is to investigate by electromyographic (EMG) surface analysis whether and how the variations in the occlusion due to the correction of the posterior crossbite using a rapid palatal expander (RPE) is accompanied by changes in the activity of the elevator muscles in the pediatric patients. (unimib.it)
  • Both models were subjected to loads simulating maximal bites on the left upper third premolar (P 3 ) and left upper second molar (M 2 ), under the assumption that the chewing muscles were acting at peak activity levels on both sides of the cranium. (nature.com)
  • A careful history and clinical examination of the jaw and neck muscles will facilitate a tentative diagnosis that may be followed by the need for additional examinations and investigations. (springer.com)
  • With neuro-muscular junction immune related inflammation (myasthenia gravis), clinical expression is mainly characterized by generalized weakness although more focal forms exist (oesophagus, ocular muscle). (vin.com)
  • Agamanolis DP, Dasu S, Krill CE Jr. Tumors of skeletal muscle. (springer.com)
  • Physiological cross-sectional area (PCSA), an important biomechanical variable, is an estimate of a muscle's contractile force potential and is derived from dividing muscle mass by the product of a muscle's average fascicle length and a theoretical constant representing the density of mammalian skeletal muscle. (ncsu.edu)
  • Voluntary, or skeletal, muscle is the largest single organ of the human body and accounts for nearly 50% of the body's weight. (medscape.com)
  • Medical professionals should combat masticatory dysfunction-induced malnutrition by detecting masticatory muscle performance using sEMG and referring patients to dental professionals. (tmu.edu.tw)
  • MMM is caused by the presence of 2M fibers in the muscles of the jaw. (wikipedia.org)
  • The sarcomeres within one of these enlarged segments (ie, contraction knot) of a muscle fiber are markedly shorter and wider than the sarcomeres in the neighboring normal muscle fibers, which are free of contraction knots. (medscape.com)
  • This same movement performed vigorously is snapping palpation (C).Right: Muscle fibers surrounded by the thumb and fingers in a pincer grip (A). The hardness of the taut band is felt clearly as it is rolled between the digits (B). The palpable edge of the taut band is sharply defined as it escapes from between the fingertips, often with a local twitch response (C). (medscape.com)
  • The protein product of MYH16 is one of the heavy chain myosins, a kind of protein that works with actin to enable muscle fibers to contract. (johnhawks.net)
  • Aoki T, Naito H, Ota Y, Shiiki K. Myositis Ossificans traumatina of the masticatory muscles: review of the literature and report of a case. (springer.com)
  • Pseudomalignant myositis ossificans involving multiple masticatory muscles: Imaging evaluation. (uiindex.org)
  • Kamalapur MG, Patil PB, Joshi S, Shastri D. Pseudomalignant myositis ossificans involving multiple masticatory muscles: Imaging evaluation. (uiindex.org)
  • The ultimate degree of recovery of jaw function and muscle mass will depend upon the extent of damage to the muscle tissue. (wikipedia.org)
  • Whether or not your dog will regain 100% of its previous jaw function and muscle mass after the MMM treatment depend greatly upon how much damage that occurred to the muscle tissue. (aquaticcommunity.com)
  • The massage of masticatory muscles is always gentle and involves small movements. (mehilainen.fi)
  • The behavior of the animals was quieter than normal but the rabbits made a greater response to external stimuli exhibiting masticatory movements, muscle twitching and transient excitement. (erowid.org)
  • Gneuromuscular (GNM) principles of occlusion are not new to the profession, but further builds on past gnathologic as well as present day technology that allow dentists to measures bio-physiologic responses of the masticatory system. (occlusionconnections.com)
  • Occlusion is maintained by the activities of the masticatory muscles which are controlled by neural integration of the feedback mechanism from the peripheral proprioceptors and the reflex mechanism of the central nervous system. (occlusionconnections.com)
  • The temporalis (star), masseter (polygon), and pterygoid (black arrow) muscles appear bilaterally and symmetrically enlarged. (avma.org)
  • Electromyographic recordings of the masseter and anterior temporal muscles were acquired bilaterally at mandibular rest and in maximal intercuspal position. (bvsalud.org)
  • Dental hygienists and dentists who provide masticatory muscle massage services can assess your need for treatment. (mehilainen.fi)
  • Massage of masticatory muscles can be performed by a trained dental hygienist or dentist. (mehilainen.fi)
  • From these scientific recordings the dental profession is able to be better informed and have a greater understanding of dental alignment, temporomandibular joint positioning and masticatory muscle problems when diagnosing and treating TMD cases. (occlusionconnections.com)
  • If the tension can be released, it is easier to make the masticatory muscles permanently relaxed through exercises. (mehilainen.fi)
  • In most cases, alleviating the tension in the masticatory muscles requires more than one appointment. (mehilainen.fi)
  • Denture retention has a significant impact on masticatory performance and speaking capacity, and thus on the subjects' quality of life [ 4 ]. (hindawi.com)
  • The analysis of the asymmetry index for two pairs of muscles during maximal voluntary contraction was based on the asymmetry index proposed by Naeije, McCarrol and Weijs (1989). (unicamp.br)
  • These muscles distinguish themselves from other muscles by having a unique muscle protein composition. (aquaticcommunity.com)
  • In a dog suffering from masticatory muscle myositis, the dog's own immune system attacks a special muscle protein that is only found in these masticatory muscles. (aquaticcommunity.com)
  • The protein is denoted as MyHC-M, for myosin heavy chain-masticatory. (johnhawks.net)
  • In most vertebrates this protein is expressed in muscles that develop from the first pharyngeal arch, including temporalis , which in mammals is the largest muscle of the jaw. (johnhawks.net)
  • While such reconstruction indicates that most masticatory muscles would have presented moderate development, both the masseter lateralis and posterior muscles were poorly developed. (conicet.gov.ar)
  • If a single muscle density constant that has been better validated than the ones presented in the previous literature is preferred, then 1.0558 and 1.0502 g/cm3 would be reasonable constants to use across all adult and juvenile muscles respectively. (ncsu.edu)
  • Manipulating the muscles in the head and mouth also makes it easier to produce sounds and breathe. (mehilainen.fi)
  • In practice, the massage involves the manipulation of masticatory muscles from inside the mouth and on top of the head. (mehilainen.fi)
  • Gloves are always worn when the muscles inside the mouth are manipulated. (mehilainen.fi)
  • The most tense muscles are often inside the mouth. (mehilainen.fi)
  • Conclusion: Les piles boutons sont des corps étrangers particuliers qu'il faut extraire en urgence. (bvsalud.org)