Masseter muscle. Medical search

A masticatory muscle whose action is closing the jaws.

Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)

A masticatory muscle whose action is closing the jaws; its posterior portion retracts the mandible.

The act and process of chewing and grinding food in the mouth.

The force applied by the masticatory muscles in dental occlusion.

Bony structure of the mouth that holds the teeth. It consists of the MANDIBLE and the MAXILLA.

Two of the masticatory muscles: the internal, or medial, pterygoid muscle and external, or lateral, pterygoid muscle. Action of the former is closing the jaws and that of the latter is opening the jaws, protruding the mandible, and moving the mandible from side to side.

Contractile tissue that produces movement in animals.

Either of a pair of bones that form the prominent part of the CHEEK and contribute to the ORBIT on each side of the SKULL.

The length of the face determined by the distance of separation of jaws. Occlusal vertical dimension (OVD or VDO) or contact vertical dimension is the lower face height with the teeth in centric occlusion. Rest vertical dimension (VDR) is the lower face height measured from a chin point to a point just below the nose, with the mandible in rest position. (From Jablonski, Dictionary of Dentistry, 1992, p250)

The mouth, teeth, jaws, pharynx, and related structures as they relate to mastication, deglutition, and speech.

Large, multinucleate single cells, either cylindrical or prismatic in shape, that form the basic unit of SKELETAL MUSCLE. They consist of MYOFIBRILS enclosed within and attached to the SARCOLEMMA. They are derived from the fusion of skeletal myoblasts (MYOBLASTS, SKELETAL) into a syncytium, followed by differentiation.

Nuclei of the trigeminal nerve situated in the brain stem. They include the nucleus of the spinal trigeminal tract (TRIGEMINAL NUCLEUS, SPINAL), the principal sensory nucleus, the mesencephalic nucleus, and the motor nucleus.

A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.

Recording of the changes in electric potential of muscle by means of surface or needle electrodes.

Any suction exerted by the mouth; response of the mammalian infant to draw milk from the breast. Includes sucking on inanimate objects. Not to be used for thumb sucking, which is indexed under fingersucking.

Muscles of facial expression or mimetic muscles that include the numerous muscles supplied by the facial nerve that are attached to and move the skin of the face. (From Stedman, 25th ed)

A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles.

The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth.

The relationship of all the components of the masticatory system in normal function. It has special reference to the position and contact of the maxillary and mandibular teeth for the highest efficiency during the excursive movements of the jaw that are essential for mastication. (From Jablonski, Dictionary of Dentistry, 1992, p556, p472)

Pain in the facial region including orofacial pain and craniofacial pain. Associated conditions include local inflammatory and neoplastic disorders and neuralgic syndromes involving the trigeminal, facial, and glossopharyngeal nerves. Conditions which feature recurrent or persistent facial pain as the primary manifestation of disease are referred to as FACIAL PAIN SYNDROMES.

Continuous involuntary sustained muscle contraction which is often a manifestation of BASAL GANGLIA DISEASES. When an affected muscle is passively stretched, the degree of resistance remains constant regardless of the rate at which the muscle is stretched. This feature helps to distinguish rigidity from MUSCLE SPASTICITY. (From Adams et al., Principles of Neurology, 6th ed, p73)

Skeletal muscle fibers characterized by their expression of the Type I MYOSIN HEAVY CHAIN isoforms which have low ATPase activity and effect several other functional properties - shortening velocity, power output, rate of tension redevelopment.

The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN.

Myosin type II isoforms found in skeletal muscle.

Skeletal muscle structures that function as the MECHANORECEPTORS responsible for the stretch or myotactic reflex (REFLEX, STRETCH). They are composed of a bundle of encapsulated SKELETAL MUSCLE FIBERS, i.e., the intrafusal fibers (nuclear bag 1 fibers, nuclear bag 2 fibers, and nuclear chain fibers) innervated by SENSORY NEURONS.

Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei. Smooth muscle fibers are bound together into sheets or bundles by reticular fibers and frequently elastic nets are also abundant. (From Stedman, 25th ed)

The larger subunits of MYOSINS. The heavy chains have a molecular weight of about 230 kDa and each heavy chain is usually associated with a dissimilar pair of MYOSIN LIGHT CHAINS. The heavy chains possess actin-binding and ATPase activity.

An articulation between the condyle of the mandible and the articular tubercle of the temporal bone.

The anatomical frontal portion of the mandible, also known as the mentum, that contains the line of fusion of the two separate halves of the mandible (symphysis menti). This line of fusion divides inferiorly to enclose a triangular area called the mental protuberance. On each side, inferior to the second premolar tooth, is the mental foramen for the passage of blood vessels and a nerve.

Skeletal muscle fibers characterized by their expression of the Type II MYOSIN HEAVY CHAIN isoforms which have high ATPase activity and effect several other functional properties - shortening velocity, power output, rate of tension redevelopment. Several fast types have been identified.

A bony prominence situated on the upper surface of the body of the sphenoid bone. It houses the PITUITARY GLAND.

Developmental events leading to the formation of adult muscular system, which includes differentiation of the various types of muscle cell precursors, migration of myoblasts, activation of myogenesis and development of muscle anchorage.

Either one of the two small elongated rectangular bones that together form the bridge of the nose.

The nonstriated involuntary muscle tissue of blood vessels.

The 5th and largest cranial nerve. The trigeminal nerve is a mixed motor and sensory nerve. The larger sensory part forms the ophthalmic, mandibular, and maxillary nerves which carry afferents sensitive to external or internal stimuli from the skin, muscles, and joints of the face and mouth and from the teeth. Most of these fibers originate from cells of the TRIGEMINAL GANGLION and project to the TRIGEMINAL NUCLEUS of the brain stem. The smaller motor part arises from the brain stem trigeminal motor nucleus and innervates the muscles of mastication.

A quaternary skeletal muscle relaxant usually used in the form of its bromide, chloride, or iodide. It is a depolarizing relaxant, acting in about 30 seconds and with a duration of effect averaging three to five minutes. Succinylcholine is used in surgical, anesthetic, and other procedures in which a brief period of muscle relaxation is called for.

A symptom complex consisting of pain, muscle tenderness, clicking in the joint, and limitation or alteration of mandibular movement. The symptoms are subjective and manifested primarily in the masticatory muscles rather than the temporomandibular joint itself. Etiologic factors are uncertain but include occlusal dysharmony and psychophysiologic factors.

The measurement of the dimensions of the HEAD.

A malocclusion in which maxillary incisor and canine teeth project over the mandiblar teeth excessively. The overlap is measured perpendicular to the occlusal plane and is also called vertical overlap. When the overlap is measured parallel to the occlusal plane it is referred to as overjet.

One of a pair of irregularly shaped bones that form the upper jaw. A maxillary bone provides tooth sockets for the superior teeth, forms part of the ORBIT, and contains the MAXILLARY SINUS.

The facial skeleton, consisting of bones situated between the cranial base and the mandibular region. While some consider the facial bones to comprise the hyoid (HYOID BONE), palatine (HARD PALATE), and zygomatic (ZYGOMA) bones, MANDIBLE, and MAXILLA, others include also the lacrimal and nasal bones, inferior nasal concha, and vomer but exclude the hyoid bone. (Jablonski, Dictionary of Dentistry, 1992, p113)

The process of growth and differentiation of the jaws and face.

The curve formed by the row of TEETH in their normal position in the JAW. The inferior dental arch is formed by the mandibular teeth, and the superior dental arch by the maxillary teeth.

Methods and procedures for the diagnosis of diseases of the ear or of hearing disorders or demonstration of hearing acuity or loss.

Reference points located by visual inspection, palpation, or computer assistance, that are useful in localizing structures on or within the human body.

Congenital or acquired asymmetry of the face.

The neck muscles consist of the platysma, splenius cervicis, sternocleidomastoid(eus), longus colli, the anterior, medius, and posterior scalenes, digastric(us), stylohyoid(eus), mylohyoid(eus), geniohyoid(eus), sternohyoid(eus), omohyoid(eus), sternothyroid(eus), and thyrohyoid(eus).

General increase in bulk of a part or organ due to CELL ENLARGEMENT and accumulation of FLUIDS AND SECRETIONS, not due to tumor formation, nor to an increase in the number of cells (HYPERPLASIA).

A sensory branch of the MANDIBULAR NERVE, which is part of the trigeminal (5th cranial) nerve. The lingual nerve carries general afferent fibers from the anterior two-thirds of the tongue, the floor of the mouth, and the mandibular gingivae.

A variety of conditions affecting the anatomic and functional characteristics of the temporomandibular joint. Factors contributing to the complexity of temporomandibular diseases are its relation to dentition and mastication and the symptomatic effects in other areas which account for referred pain to the joint and the difficulties in applying traditional diagnostic procedures to temporomandibular joint pathology where tissue is rarely obtained and x-rays are often inadequate or nonspecific. Common diseases are developmental abnormalities, trauma, subluxation, luxation, arthritis, and neoplasia. (From Thoma's Oral Pathology, 6th ed, pp577-600)

A branch of the trigeminal (5th cranial) nerve. The mandibular nerve carries motor fibers to the muscles of mastication and sensory fibers to the teeth and gingivae, the face in the region of the mandible, and parts of the dura.

A condition in which certain opposing teeth fail to establish occlusal contact when the jaws are closed.

A state arrived at through prolonged and strong contraction of a muscle. Studies in athletes during prolonged submaximal exercise have shown that muscle fatigue increases in almost direct proportion to the rate of muscle glycogen depletion. Muscle fatigue in short-term maximal exercise is associated with oxygen lack and an increased level of blood and muscle lactic acid, and an accompanying increase in hydrogen-ion concentration in the exercised muscle.

The semilunar-shaped ganglion containing the cells of origin of most of the sensory fibers of the trigeminal nerve. It is situated within the dural cleft on the cerebral surface of the petrous portion of the temporal bone and gives off the ophthalmic, maxillary, and part of the mandibular nerves.

Malocclusion in which the mandible is posterior to the maxilla as reflected by the relationship of the first permanent molar (distoclusion).

The resection or removal of the innervation of a muscle or muscle tissue.

Malocclusion in which the mandible and maxilla are anteroposteriorly normal as reflected by the relationship of the first permanent molar (i.e., in neutroclusion), but in which individual teeth are abnormally related to each other.

Neurons which activate MUSCLE CELLS.

The anterior portion of the head that includes the skin, muscles, and structures of the forehead, eyes, nose, mouth, cheeks, and jaw.

Activation of peripheral GABAA receptors inhibits temporomandibular joint-evoked jaw muscle activity. (1/310)

We have previously shown that injection of mustard oil or glutamate into rat temporomandibular joint (TMJ) tissues, an experimental model of acute TMJ injury, can reflexly induce a prolonged increase in the activity of both digastric (jaw-opener) and masseter (jaw-closer) muscles. In this study, GABA was applied to the TMJ region by itself or in combination with glutamate, and the magnitude of evoked jaw muscle electromyographic (EMG) activity was measured. Application of GABA alone to the TMJ region did not evoke significant jaw muscle EMG activity when compared with normal saline controls. In contrast, co-application of GABA and glutamate into the TMJ region decreased the magnitude of glutamate-evoked EMG activity. This GABA-mediated inhibition of glutamate-evoked EMG activity followed an inverse dose-response relationship with an estimated median inhibitory dose (ID50) of 0.17 +/- 0.05 (SE) micromol and 0.031 +/- 0.006 micromol for the digastric and masseter muscles, respectively. Co-administration of the GABAA receptor antagonist bicuculline (0.05 micromol) but not the GABAB receptor antagonist phaclofen (0.05 or 0. 15 micromol) reversed the suppressive actions of GABA, indicating that this action of GABA may be mediated by peripheral GABAA receptors located within the TMJ region. Our results suggest that activation of peripheral GABAA receptors located within the TMJ region could act to decrease the transmission of nociceptive information. (+info)

Halothane induces calcium release from human skinned masseter muscle fibers. (2/310)

BACKGROUND: An increase in masseter muscle tone in response to halothane or succinylcholine anesthesia (or both) can be observed in healthy persons. Thus the authors compared the fiber-type halothane and succinylcholine sensitivities in human masseter and vastus lateralis muscles. METHODS: Masseter and vastus lateralis muscle segments were obtained from 13 and 9 healthy persons, respectively. After chemical skinning of a single fiber and loading the sarcoplasmic reticulum with Ca++ 0.16 microM solution, halothane (0.5-4 vol% bubbled in the incubating solution), succinylcholine (0.1 microM to 10 mM), or both sensitivities were defined as the concentration inducing more than 10% of the maximum tension obtained by application of 16 microM Ca++ solution. The myofilament response to Ca++ was studied with and without halothane by observing the isometric tension of skinned masseter fibers challenged with increasing concentrations of Ca++. Muscle fiber type was determined by the difference in strontium-induced tension measurements. RESULTS: A significant difference in halothane sensitivity was found between type 1 masseter fibers (0.6+/-0.2 vol%; mean +/- SD) versus type 1 (2.7+/-0.6 vol%) and type 2 vastus lateralis muscle (2.5+/-0.4 vol%). Succinylcholine did not induce Ca++ release by the sarcoplasmic reticulum. In the masseter muscle, 0.75 vol% halothane decreased the maximal activated tension by 40% but did not change the Ca++ concentration that yields 50% of the maximal tension. CONCLUSIONS: The very low halothane threshold for Ca++ release from the masseter muscle usually could be counteracted by a direct negative inotropic effect on contractile proteins. However, halothane may increase the sensitivity of the sarcoplasmic reticulum Ca++ release to succinylcholine-induced depolarization, leading to an increase in masseter muscle tone. (+info)

Jaw reflexes evoked by mechanical stimulation of teeth in humans. (3/310)

Jaw reflexes evoked by mechanical stimulation of teeth in humans. The reflex response of jaw muscles to mechanical stimulation of an upper incisor tooth was investigated using the surface electromyogram (SEMG) of the masseter muscle and the bite force. With a slowly rising stimulus, the reflex response obtained on the masseter SEMG showed three different patterns of reflex responses; sole excitation, sole inhibition, and inhibition followed by excitation. Simultaneously recorded bite force, however, exhibited mainly one reflex response pattern, a decrease followed by an increase in the net closing force. A rapidly rising stimulus also induced several different patterns of reflex responses in the masseter SEMG. When the simultaneously recorded bite force was analyzed, however, there was only one reflex response pattern, a decrease in the net closing force. Therefore, the reflex change in the masseter muscle is not a good representative of the net reflex response of all jaw muscles to mechanical tooth stimulation. The net response is best expressed by the averaged bite force. The averaged bite force records showed that when the stimulus force was developing rapidly, the periodontal reflex could reduce the bite force and hence protect the teeth and supporting tissues from damaging forces. It also can increase the bite force; this might help keep food between the teeth if the change in force rate is slow, especially when the initial bite force is low. (+info)

Muscle spindle afferent input to motoneurons in human masseter. (4/310)

The H-reflex response in large and small single motor units in human deep anterior masseter was studied to investigate the distribution of muscle spindle afferents onto masseter motoneurons. We found that only the larger units displayed H-reflex responses. This indicates preferential distribution of muscle spindle input onto large motoneurons or a skewed distribution of tonic presynaptic inhibitory mechanisms. (+info)

Jaw reflexes in healthy old people. (5/310)

OBJECTIVE: to investigate variations in the masseteric myotatic reflex (jaw-jerk) and the silent period from the 5th to the 9th decades of life. SUBJECTS AND METHODS: electromyographic data were recorded from the masseter muscle of the preferred chewing side by surface electrodes, using a computerized recording and analysis system. Chin taps were applied with a neurologist's hammer during mandibular rest and at 40% intercuspal clenching in 30 healthy people aged from 49 to 87 years. The influence of age, gender and silent period type were analysed by multiple regression analysis (P < or = 0.05). RESULTS: even in the very old subjects all reflexes were elicited, at least once. However, with increasing age the overall occurrence of the jaw-jerk reflex at rest (%) and its amplitude, at rest and at clench, were reduced, while its latency at rest was significantly increased (P < or = 0.05). No age effects were recorded in most parameters of the jaw-jerk reflex at clench and in the silent period. Women showed a tendency for reduced latencies of the jaw-jerk and the early silent period and increased silent period duration (P < or = 0.05). They also had a steeper decline in myotatic reflex activity, particularly at rest. CONCLUSION: simple masseteric reflex activity is maintained until very old age, particularly when elicited during contraction of the jaw elevators. (+info)

Behavior of jaw muscle spindle afferents during cortically induced rhythmic jaw movements in the anesthetized rabbit. (6/310)

The regulation by muscle spindles of jaw-closing muscle activity during mastication was evaluated in anesthetized rabbits. Simultaneous records were made of the discharges of muscle spindle units in the mesencephalic trigeminal nucleus, masseter and digastric muscle activity (electromyogram [EMG]), and jaw-movement parameters during cortically induced rhythmic jaw movements. One of three test strips of polyurethane foam, each of a different hardness, was inserted between the opposing molars during the jaw movements. The induced rhythmic jaw movements were crescent shaped and were divided into three phases: jaw-opening, jaw-closing, and power. The firing rate of muscle spindle units during each phase increased after strip application, with a tendency for the spindle discharge to be continuous throughout the entire chewing cycle. However, although the firing rate did not change during the jaw-opening and jaw-closing phases when the strip hardness was altered, the firing rate during the power phase increased in a hardness-dependent manner. In addition, the integrated EMG activity, the duration of the masseteric bursts, and the minimum gape increased with strip hardness. Spindle discharge during the power phase correlated with jaw-closing muscle activity, implying that the change in jaw-closing muscle activity associated with strip hardness was caused by increased spindle discharge produced through insertion of a test strip. The increased firing rate during the other two phases may be involved in a long-latency spindle feedback. This could contribute to matching the spatiotemporal pattern of the central pattern generator to that of the moving jaw. (+info)

Global field power helps separate respiratory-related evoked potentials from EMG contamination. (7/310)

Respiratory-related evoked potentials (RREPs) were stimulated by brief (200-ms) oral pressure pulses (-10 cmH(2)O) applied at the onset of inspiration in 12 subjects. Scalp potentials were measured at 30 sites on a rectangular grid that encompassed the right side of the scalp overlying the somatosensory cortex (SSC). Concurrent and significant masseter EMG (mEMG) activity was evoked by the pressure pulse, and we found correlational evidence for contamination of the RREP by the mEMG. The global field power (GFP) was used to provide a robust, reference-independent measure of SSC activation that provided partial insulation from mEMG contamination. The mean GFP from all subjects, reflective of afferent information from respiratory mechanoreceptors, showed a latency to onset of significant afferent SSC activity of approximately 25 ms. Scalp GFP activity during control experiments (absence of applied pressure) was significant and may reflect ongoing afferent activity from inspiration. (+info)

Contribution of supraglottal mechanoreceptor afferents to respiratory-related evoked potentials in humans. (8/310)

We used the global field power (GFP) to estimate the magnitude and timing of activation of the somatosensory cortex by respiratory mechanoreceptor afferents in normal humans in response to brief, negative oral pressure pulses applied at the onset of inspiration. We compared responses before (test) and after insertion of a laryngeal mask airway (LMA) that prevented supraglottal airway receptors from sensing the applied stimulus. Evoked potential responses without supraglottic stimulation were smaller, with delayed or missing features, than those with all receptors stimulated. Supraglottic receptors contribute about one-half of the GFP summed over the 100 ms poststimulus, and subglottal receptors, including those in the larynx, provide a GFP response approximately 38% above baseline. The most obvious difference between test and LMA responses occurred at 55 ms on average, when the LMA GFP lacked activation features seen in the test condition. We conclude that mechanoreceptors above the larynx are responsible for a major portion of the midlatency afferent information arriving at the somatosensory cortex in response to applied pressure pulses. (+info)

... weak chewing muscles (masseter); weak lip muscles (orbicularis oris); overdeveloped chin muscles (mentalis); muscular imbalance ... and facial muscle patterns that promote correct gestures for chewing and eating Retrain oral, lingual, and facial muscles to ... Other causes of open-mouth posture are the weakness of lip muscles, overall lack of tone in the body or hypotonia, and ... Mouth breathing can particularly affect the growing face, as the abnormal pull of these muscle groups on facial bones slowly ...

https://en.wikipedia.org/wiki/Orofacial_myofunctional_disorders

It ramifies nearly as far as the anterior border of the masseter muscle. The masseteric nerve supplies the masseter muscle. It ... It crosses the mandibular notch to reach masseter muscle. It supplies the masseter muscle, and gives sensation to the ... It then reaches the deep surface of the masseter muscle, often branching into 2 or 3 branches. ... It passes laterally, above the lateral pterygoid muscle, in front of the temporomandibular articulation, and behind the tendon ...

https://en.wikipedia.org/wiki/Masseteric_nerve

The ECMs were focussed on the masseter muscle and temporalis muscle. Females showed a significantly higher amplitude - meaning ... In response, the masseter muscles will jerk the mandible upwards. Normally this reflex is absent or very slight. However, in ... Jaw muscles do not display very prominent changes in muscular tissue with age in healthy elderly, as their oral cavities are in ... The jaw jerk reflex or the masseter reflex is a stretch reflex used to test the status of a patient's trigeminal nerve (cranial ...

https://en.wikipedia.org/wiki/Jaw_jerk_reflex

It is superficial to the masseter muscle, partially covering it. Like all muscles of facial expression, the risorius is ... The risorius muscle is a muscle of facial expression. It arises from the fascia over the parotid gland, and inserts into the ... It has been suggested that the risorius muscle is only found in Homininae (African great apes and humans). The risorius muscle ... The risorius muscle retracts the angle of the mouth to produce a smile, albeit an insincere-looking one that does not involve ...

https://en.wikipedia.org/wiki/Risorius

The masseter muscle does not pass through the infraorbital canal; it cannot due to the position of the canal. Some authorities ... The masseter muscle does attach directly behind the zygomatic arch in a manner very different from sciuromorphs. Some ...

https://en.wikipedia.org/wiki/Geomyoidea

The defining feature is muscle diastasis which is separation of the masseter. This phenotype can also be partially corrected ... The facial cleft in this case results in a more severe muscle separation even though there is not a true open cleft. Bones in ... This version of macrostomia is less severe because it does not affect the facial muscles and is not associated with any soft ... The clefts cause problems with facial muscle development. The origin of macrostomia is not yet fully understood: it could have ...

https://en.wikipedia.org/wiki/Macrostomia

The location these carnassial pairs is determined primarily by the masseter muscle. In this position, the carnassial teeth ... tendon and muscle. The scissor-like motion is created by the movement between the carnassial pair when the jaw occludes. The ... benefit from most of the force generated by this mastication muscle, allowing for efficient shearing and cutting of flesh, ...

https://en.wikipedia.org/wiki/Carnassial

Masseter muscle is compartmentalized by a laminar structure, which was shown to elevate Tnmd mRNA in mouse embryos between ... "Tenomodulin regulated the compartments of embryonic and early postnatal mouse masseter muscle". Annals of Anatomy - ... The epimysium of skeletal muscle is also TNMD -positive. - Tnmd mRNA was detected in eyes, more specifically in the ... In tendinous structures chordae tendineae cordis, which connect papillary muscle to the atrioventricular valves in the heart, ...

https://en.wikipedia.org/wiki/Tenomodulin

Bydyznski T, Stoyva J (1973). "An electromyographic feedback technique for teaching voluntary relaxation of the masseter muscle ... uses surface electrodes to detect muscle action potentials from underlying skeletal muscles that initiate muscle contraction. ... discovering that subjects learned this skill by inhibiting interfering muscles and demonstrating that skeletal muscles are self ... 1962 - Publication of Muscles Alive by John Basmajian and Carlo De Luca 1968 - Annual Veteran's Administration research meeting ...

https://en.wikipedia.org/wiki/Biofeedback

Endo, B (1970). "Analysis of Stresses around the Orbit Due to Masseter and Temporalis Muscles Respectively". The Journal of ... Endo, B (1970). "Analysis of Stresses around the Orbit Due to Masseter and Temporalis Muscles Respectively". The Journal of ... thought to be positively correlated with the size of the masseter muscle, as well as with the improper orientation of bone in ... Anatomy portal Occipitofrontalis muscle Supraciliary scale Frontal sinus This article incorporates text in the public domain ...

https://en.wikipedia.org/wiki/Brow_ridge

The masseter, or cheek muscle, opens and closes the jaw and allows chewing. The Brachiocephalicus is a wide strap-like muscle ... This muscle turns and extends the neck, and makes up the topline if well developed. The Trapezius is a flat, sheet-like muscle ... This muscle moves the head and neck. In ewe-necked or bull-necked horses, this muscle is overdeveloped, and is difficult to get ... This muscle moves the head from side to side, pulls the scapula forward, raises it in collection, and swings the foreleg ...

https://en.wikipedia.org/wiki/Forehand_(horse)

The fastest reflex recorded in humans happens within the masseter muscle or jaw muscle. The reflex was measured by ... The blink of the eye which is the reflex of the orbicularis oculi muscle was found to have a latency of about 20 to 40 ... motor neurons in the facial motor nucleus or the spinal cord that will directly or indirectly control the movement of muscles. ... electromyography which records the electrical activity during movement of the muscles. This also showed the latency response or ...

https://en.wikipedia.org/wiki/Startle_response

The lateral surface is smooth, and affords insertion to the temporalis and masseter muscles. Its medial surface gives insertion ... with the zygomatic arch and masseter removed Coronoid process of mandible Deep dissection of the mandibular nerve and bone ( ... temporo-zygomatic bone and their associated muscles. Most fractures here are caused by strokes (contusion or penetrating ...

https://en.wikipedia.org/wiki/Coronoid_process_of_the_mandible

... where no extreme specialization of the masseter muscle has evolved. In the protrogomorphous condition, the masseter muscle does ... where no extreme specialization of the masseter muscle has evolved. In the protrogomorphous condition, the masseter muscle does ... Likewise, the medial masseter muscle attaches to the base of the zygomatic arch and does not extend to the region in front of ... Likewise, the medial masseter muscle attaches to the base of the zygomatic arch and does not extend to the region in front of ...

https://en.wikipedia.org/wiki/Mountain_beaver

Both the temporalis and masseter muscles are well developed, creating a strong bite force. The teeth are extremely broad and ... Strong muscles are also required for bone crushing, and the temporalis attachment on the skull is enlarged by a strong sagittal ... To feed with this type of structure the fish can protrude its mouth ventrally to permit muscles to be seized by the jaws and ... The sagittal crest projects well above the area of attachment of the neck muscles, and in a large animal it extends back far ...

https://en.wikipedia.org/wiki/Durophagy

Masseter muscle - In human anatomy, the masseter is one of the muscles of mastication. Found only in mammals, it is ... Oblique muscle of auricle - The oblique muscle of auricle (oblique auricular muscle or Tod muscle) is an intrinsic muscle of ... The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest. ... "Muscles within muscles: Coordination of 19 muscle segments within three shoulder muscles during isometric motor tasks". J ...

https://en.wikipedia.org/wiki/Glossary_of_medicine

It gives attachment throughout nearly the whole of its extent to the masseter muscle. On the inside at the center there is an ... Attached to this is the masseter muscle, the depressor labii inferioris and depressor anguli oris, and the platysma (from below ... for the attachment of the masseter laterally, and the medial pterygoid muscle medially; the stylomandibular ligament is ... This provides attachment to the temporal muscle. Teeth sit in the upper part of the body of the mandible. The frontmost part of ...

https://en.wikipedia.org/wiki/Mandible

The macroraptorials also had well-developed muscles used in biting-the temporalis and masseter. They also developed buccal ... The elongated lumbar vertebrae of Zygophyseter indicate it had larger multifidus and longissimus back muscles and was, thus, ...

https://en.wikipedia.org/wiki/Macroraptorial_sperm_whale

The muscles of mastication (the temporalis, masseter, medial and lateral pterygoid muscles) are paired on either side and work ... This typically involves the masseter muscle and the anterior portion of the temporalis (the large outer muscles that clench), ... particularly the masseter muscle. Tenderness, pain or fatigue of the muscles of mastication, which may get worse during chewing ... Most (but not all) bruxism includes clenching force provided by masseter and temporalis muscle groups; but some bruxers clench ...

https://en.wikipedia.org/wiki/Bruxism

The masseter muscle on the skull was probably the main muscle used for biting down. The later species had a more powerful bite ... The pterygoid muscle in later species was larger to adapt to a grinding motion rather than a cutting motion while chewing. The ... The small neck vertebrae show they had weak neck muscles, as an aquatic creature does not need to hold its head up, and the ... This inclination may have caused less-developed back muscles that would have been needed for high-powered swimming. The ...

https://en.wikipedia.org/wiki/Thalassocnus

It had a large fossa at the insertion of the superficial and deep masseter muscles. Reguero, Marcelo A.; Dozo, María Teresa; ...

https://en.wikipedia.org/wiki/Medistylus

It runs forward along the lateral side of the masseter muscle for around 7 cm. In this course, the duct is surrounded by the ... It takes a steep turn at the border of the masseter and passes through the buccinator muscle, opening into the vestibule of the ...

https://en.wikipedia.org/wiki/Parotid_duct

AVE at 10 Hz produced deep masseter muscle relaxation and finger warming within six minutes. Audio entrainment has shown ...

https://en.wikipedia.org/wiki/Audio-visual_entrainment

The zygomatic arch is robust and provides a large area for attachment of the masseter muscle. This musculature and its strong ... The sagittal crest of its skull is well-developed providing a large area for attachment of the temporal muscle. ...

https://en.wikipedia.org/wiki/African_civet

The skulls of bears are massive, providing anchorage for the powerful masseter and temporal jaw muscles. The canine teeth are ... If they have stored enough body fat, their muscles remain in good condition, and their protein maintenance requirements are met ...

https://en.wikipedia.org/wiki/Bear

... superficial to the masseter muscle. The duct pierces the buccinator muscle, then opens into the mouth on the inner surface of ... masseter and medial pterygoid muscles. A part of the gland may extend between the ramus and medial pterygoid, as the pterygoid ... Parotid gland (incorrect muscle name) Mandibular division of the trigeminal nerve (5th Cranial Nerve) Wikimedia Commons has ... The risorius is a small muscle embedded with this capsule substance. The gland has short, striated ducts and long, intercalated ...

https://en.wikipedia.org/wiki/Parotid_gland

A sciuromorphous zygomasseteric system is characterized by attachment of the lateral masseter muscle along the side of the ... Unlike hystricomorphous and myomorphous rodents, the medial masseter muscle does not pass through the infraorbital canal. Among ... Some authorities would exclude the Geomyidae and Heteromyidae from that list due to the attachment of the medial masseter ...

https://en.wikipedia.org/wiki/Sciuromorpha

Similar to other hystricomorphs, their chewing muscles are unique. Through an arm of the masseter muscles, passing through the ...

https://en.wikipedia.org/wiki/Old_World_porcupine

For the mouth to close it requires the following muscles: the masseter, temporalis, and medial pterygoid muscle. For the jaw to ... The muscles that are affected during anterior jaw dislocation are the masseter and temporalis which pull up on the mandible and ... When the muscle's alignment is out of sync, a pain will occur due to unwanted rotation of the jaw. If the pain remains constant ... Numbing medications such as general anesthetics, muscle relaxants, or in some cases sedation, may be needed to relax the strong ...

https://en.wikipedia.org/wiki/Dislocation_of_jaw

A wide lower face can primarily be caused by a wide mandibular bone or large masseter muscle. A large masseter muscle can be ... While a masseter muscle can be large due to genetic reasons, it can commonly be an acquired trait. Like any muscle it increases ... The level of protrusion of the mandible angle, the size of the masseter muscle and the overall structure of the jaw are ... A convenient method to treat an enlarged muscle is through the use of botox injections. Botox is injected into the muscle, ...

https://en.wikipedia.org/wiki/Jaw_reduction

The main muscles involved are the masseter, temporalis and medial and lateral pterygoid muscles. ... Muscles of masticationEdit. Main article: Muscles of mastication. The muscles of mastication are paired on each side and work ... Injections of local anesthetic, sometimes combined with steroids, into the muscles (e.g. the temoralis muscle or its tendon) ... such as the TMJ and the masseter muscle. Symptoms of sialendenitis and sialothiasis cases can be confused with Eagle syndrome, ...

https://en.m.wikipedia.org/wiki/Temporomandibular_joint_dysfunction

পেশী (Muscle) *হৃৎপেশী (Cardiac muscle). *অনৈচ্ছিক পেশী (Involuntary muscle). *ঐচ্ছিক পেশী (অস্থিপেশী) (Voluntary/Skeletal ... চর্বক পেশী (Masseter) চোয়ালের পেশী. *রগপেশী (Temporalis)- মস্তকের পেশী. *বক্ষঃপেশী (Pectoralis). *সমলম্বিকা পেশী (Trapezius) ...

https://bn.wikipedia.org/wiki/মানব_শিশ্ন

Do not add: synonyms or information about the structure itself (eg nerve or muscle supply). These should be found within an ... চর্বক পেশী (Masseter) চোয়ালের পেশী. *রগপেশী (Temporalis)- মস্তকের পেশী. *বক্ষঃপেশী (Pectoralis). *সমলম্বিকা পেশী (Trapezius) ...

https://bn.wikipedia.org/wiki/টেমপ্লেট:মানবদেহের_অঙ্গতন্ত্রসমূহ

J. monesi has the deepest insertion point for the masseter muscle (which closes the mouth while biting down) of any rodent. It ... This is because they initially guessed J. monesi could not grind up tough plants due to having weak chewing muscles, on account ... monesi at the incisors by reconstructing the major biting muscles and their strengths. They reported 799-1,199 N (180-270 lbf) ... conferring to a reduced medial pterygoid muscle (also important for biting). The zygomatic arches (cheekbones) of J. monesi are ...

https://en.wikipedia.org/wiki/Josephoartigasia

... which indicate a massive masseter muscle (used in biting down) placed near the front of the head (increasing mechanical ... Further, the size of the sagittal crest (and the gluteus muscles) in male western lowland gorillas has been correlated with ... it is also possible that male gorillas and orangutans require larger temporalis muscles to achieve a wider gape to better ... the crest may be influenced by sexual selection in addition to supporting chewing muscles. ...

https://en.wikipedia.org/wiki/Paranthropus_boisei

Lower part of the temporalis muscle and masseter muscle (origin of masseter muscle:lower margin of the inner surface of ... These are the masseteric nerve to masseter muscle, the deep temporal nerve to temporalis muscle, the lateral pterygoid nerve to ... It contains superficial muscles, including the lower part of the temporalis muscle, the lateral pterygoid muscle, and the ... It also gives branches to mylohyoid muscle, the anterior belly of digastric muscle, the tensor veli palatini muscle, and tensor ...

https://en.wikipedia.org/wiki/Infratemporal_fossa

... the tendon of the temporal muscle passes medial to (i.e. through the middle of) the arch, to gain insertion into the coronoid ... the lower border and medial surface give origin to the masseter. High cheekbones are pronounced zygomatic arches, causing the ... the zygomatic arch and masseter have been removed. Dissection, showing salivary glands of right side Fracture of the zygomatic ...

https://en.wikipedia.org/wiki/Zygomatic_arch

As the mentalis muscle contracts, it can cause displacement of the prosthesis in a posterior and upward fashion Masseter muscle ... These are: Mentalis muscle - the effects of this muscle are more evident when there has been considerable alveolar bone ... Occlusal surface Polished surface Impression surface The peri-oral muscles (muscles of the cheeks and lips) can cause ... Facial muscles on the cheeks and lips also lose their support as teeth are lost, contributing to an 'aged' appearance of the ...

https://en.wikipedia.org/wiki/Complete_dentures

It then curves upward over the body of the mandible at the antero-inferior angle of the masseter; passes forward and upward ... It passes obliquely up beneath the digastric and stylohyoid muscles, over which it arches to enter a groove on the posterior ... the terminal branch Muscles supplied by the facial artery include: buccinator levator anguli oris levator labii superioris ... it then passes beneath the digastric and stylohyoid muscles and part of the submandibular gland, but superficial to the ...

https://en.wikipedia.org/wiki/Facial_artery

The postero-inferior or zygomatic border affords attachment by its rough edge to the masseter. The zygomatic bone articulates ... which gives origin to the zygomaticus muscle. The temporal surface, directed posteriorly and medially, is concave, presenting ...

https://en.wikipedia.org/wiki/Zygomatic_bone

Spring/Summer, 3-9. Budzynski, T.H. (1982). Introduction to techniques for the treatment of muscle contraction headaches. In PA ... An electromygraphic feedback technique for teaching voluntary relaxation of the masseter. Journal of Dental Research, 52,116- ... Budzynski, T.H., Stoyva, J. M. & Adler, C.S. (1970). Feedback-induced muscle relaxation: Application to tension headache. ... An instrument for producing deep muscle relaxation by means of analog information feedback. Journal of Applied Behavior ...

https://en.wikipedia.org/wiki/Thomas_Budzynski

Like many grazers, the masseter muscle (also responsible for closing the jaw) seems to have been the dominant jaw muscle, and a ... The ridges for muscle attachments are poorly developed, which seems to have been compensated by the powerful forearms. ... The expanded sinuses increase the surface area available for the temporalis muscle to attach (important for biting and chewing ... probable large temporal muscle compared to the lateral pterygoid muscle may indicate, unlike wombats, a limited range of jaw ...

https://en.wikipedia.org/wiki/Diprotodon

Phayre's langur show craniodental adaptations such as medially positioned rows of teeth and stronger masseter pterygoid muscles ...

https://en.wikipedia.org/wiki/Phayre's_leaf_monkey

The submasseteric space is logically located under (deep to) the masseter muscle, created by the insertions of masseter onto ... Trismus (difficulty opening the mouth) is a sign that the muscles of mastication (the muscles that move the jaw) are involved. ... The muscles of mastication are enclosed in a layer of fascia, formed by cervical fascia ascending from the neck which divides ... Generally, the spread of infection is determined by barriers such as muscle, bone and fasciae. Pus moves by the path of least ...

https://en.wikipedia.org/wiki/Fascial_spaces_of_the_head_and_neck

The medial pterygoid, along with the masseter allows the jaw to move in a vertical direction as it contracts and relaxes. The ... and serves as the origin of the lateral pterygoid muscle, which functions in allowing the mandible to move in a lateral and ... which contains the medial pterygoid muscle and the tensor veli palatini. Above this fossa is a small, oval, shallow depression ... and gives attachment to the lateral pterygoid muscle; its medial surface forms part of the pterygoid fossa, and gives ...

https://en.wikipedia.org/wiki/Pterygoid_processes_of_the_sphenoid

Though the low jaw joint provided more room for the temporalis muscle, it also posed a problem for the masseter muscle. The ... The pterygoideus muscle, which follows a similar path and function to the masseter, also benefited from the deep flange at the ... these mammals use their equivalent projections as a means of providing extra space for the attachment of the masseter muscle, ... The wide and tall temporal fossa allowed for a very large temporalis muscle, which extends from the side of the cranium to the ...

https://en.wikipedia.org/wiki/Entelodont

... condyles mandibular foramen mandibular fossa mandibular nerve mandibular notch manubrium massa intermedia masseter muscle ... motor unit mouth mucoperiosteum mucosa mucous membranes multifidus muscle muscle fascicle muscle spindle muscle tissue muscles ... of retina rectum rectus abdominis muscle rectus capitis anterior muscle rectus capitis lateralis muscle rectus femoris muscle ... levator muscle levator labii superioris muscle levator palpebrae muscle levator palpebrae superioris levator scapulae muscle ...

https://en.wikipedia.org/wiki/Index_of_anatomy_articles

... masseter muscle MeSH A14.530.790 - pterygoid muscles MeSH A14.530.940 - temporal muscle MeSH A14.549.167 - dentition MeSH ... palatal muscles MeSH A14.549.617.660 - palate, hard MeSH A14.549.617.780 - palate, soft MeSH A14.549.617.780.729 - uvula MeSH ... pharyngeal muscles MeSH A14.724.617.360 - esophageal sphincter, upper MeSH A14.907.900 - temporomandibular joint disk The list ...

https://en.wikipedia.org/wiki/List_of_MeSH_codes_(A14)

The muscles of mastication or masticatory muscles are: a) masseter, b) temporalis, c) medial pterygoid, d) superior belly of ... Weber worked out that 1 cm2 cross section surface area of any masticatory muscle can produce approximately 10 kg force. The ... Morill worked more deeply on the relationship between masticatory muscles and pain signals from the periodontal tissue in ... The periodontal system controls automatically the measure of mastication force in this process and the jaw elevator muscles ...

https://en.wikipedia.org/wiki/Nankali's_Masticatory_Force_Systematization

... masseter, medial pterygoid, and temporalis) or within the deep neck spaces. The space between the muscles of mastication is ... Each muscle, group of muscles, or separate anatomical compartment is encased in a thin fibrous layer of connective tissue ... suggests that the infection has spread to spaces between the jaw and muscles of mastication (masseter, medial pterygoid, and ... The borders of the oral cavity include the lips in the front, cheeks on the side, mylohyoid muscle/associated soft tissue below ...

https://en.wikipedia.org/wiki/Mouth_infection

These functions include: 1) Respiration: monitors the acidity of the blood and sends electrical signals to intercostal muscle ... masseter) Because of its location in the brainstem and its many important roles in the autonomic nervous system, damage to the ...

https://en.wikipedia.org/wiki/Myelencephalon

... fangs and its powerful masseter muscles to deliver a bite force of 28 kg/cm2 (400 lbf/in2), which is capable of breaking open ... The kidneys and spleen are eaten once they are exposed, followed by the muscles. A wolf can eat 15-19% of its body weight in ... It is slender and powerfully built, with a large, deeply descending rib cage, a sloping back, and a heavily muscled neck. The ... and crippling muscle pains in dogs. Thorny-headed worms rarely infect wolves, though three species have been identified in ...

https://en.wikipedia.org/wiki/Wolf

With progression the illness involves the pectoral girdle and trunk muscles and finally the masseters and temporal muscles. The ... The initial symptoms are muscle spasms in the legs and alopecia, also known as baldness. The spasms are painful and progressive ... characterized by painful muscle spasms, alopecia, diarrhea, endocrinopathy with amenorrhoea and secondary skeletal ... spasms usually spare the facial muscles. Severe spasms can interfere with respiration and speech. During an attack-free period ...

https://en.wikipedia.org/wiki/Satoyoshi_syndrome

The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest. The ... Masseter muscle. Deep dissection. Mummification process. Zygomasseteric system The word masseter (usually /məˈsiːtər/, ... musculus masseter. The action of the muscle during bilateral contraction of the entire muscle is to elevate the mandible, ... The masseter muscle can become enlarged in patients who habitually clench or grind (with bruxism) their teeth and even in those ...

https://en.wikipedia.org/wiki/Masseter_muscle

... and body constitution with masseter muscle thickness. Results: In the relaxing, the masseter was 9.8±1.3 mm in females and 11.3 ... and body constitution with masseter muscle thickness. Results: In the relaxing, the masseter was 9.8±1.3 mm in females and 11.3 ... and body constitution with masseter muscle thickness. Results: In the relaxing, the masseter was 9.8±1.3 mm in females and 11.3 ... and body constitution with masseter muscle thickness. Results: In the relaxing, the masseter was 9.8±1.3 mm in females and 11.3 ...

https://yonsei.pure.elsevier.com/en/publications/the-relationship-between-masseter-muscle-thickness-measured-by-ul

chewing; masseter muscle; muscle fatigue; near-infrared spectroscopy; orofacial myofunctional evaluation; temporomandibular ... Patients with myogenic temporomandibular disorders have reduced oxygen extraction in the masseter muscle. C. L. P. Ferreira;G. ... Objective: The objective of the present study is to investigate if changes in the oxygen saturation of masseter muscle during a ... Objective: The objective of the present study is to investigate if changes in the oxygen saturation of masseter muscle during a ...

https://air.unimi.it/handle/2434/424361

Forehead Lines Glabellar Lines Crows Feet Masseter Muscle Trapezius Muscle Calf Muscle ... Forehead Lines Glabellar Lines Crows Feet Masseter Muscle Trapezius Muscle Calf Muscle ...

https://btxa.com/result/main/22/

Maekawa, K. (2000). Intramuscular hemodynamic responses to sustained masseter muscle extension in humans. Journal of Dental ... Maekawa, K 2000, Intramuscular hemodynamic responses to sustained masseter muscle extension in humans., Journal of Dental ... Intramuscular hemodynamic responses to sustained masseter muscle extension in humans. In: Journal of Dental Research. 2000 ; ... Intramuscular hemodynamic responses to sustained masseter muscle extension in humans. Journal of Dental Research. 2000;79( ...

https://okayama.pure.elsevier.com/en/publications/intramuscular-hemodynamic-responses-to-sustained-masseter-muscle-

Masseter hypertrophy is recognized as an asymptomatic enlargement of one or both masseter muscles. A hypertrophied masseter ... The essential role of masseter muscle is for adequate mastication. This bulky muscle is located laterally to the mandibular ... into the masseter muscle was considered as less invasive modality for the treatment of muscle hypertrophy. Local injection of ... The surgery to access the masseter muscles and the mandible (jawbone) is performed through incisions on the inside of the mouth ...

https://msprs.org.my/aesthetic-surgery/masseter-muscle-reduction/

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https://mrcemsuccess.com/keywords/masseter-muscle/

The deep fibres of this muscle also retrude the mandible. This muscle commonly harbours trigger… ... The masseter is the main muscle that moves your jaw. It originates on the zygomatic arch and maxilla, and inserts on the ... The masseter is the main muscle that moves your jaw. It originates on the zygomatic arch and maxilla, and inserts on the ... Trigger points in the masseter muscle. January 16, 2018. December 29, 2017. ~ bryancobb ...

https://aberdeenchiropracticblog.com/2018/01/16/trigger-points-in-the-masseter-muscle/

The muscle then is freed immediately by raising it off the mandible with periosteal elevators. Once the masseter muscle is ... The masseter muscle transposition technique is used when the temporalis muscle is unavailable due to either resection, such as ... Intraoral approach harvests the masseter muscle for transfer. Incision is made along the gingival sulcus (A). One muscle is ... Intraoral approach harvests the masseter muscle for transfer. Incision is made along the gingival sulcus (A). One muscle is ...

https://www.medscape.com/answers/879441-169923/which-conditions-must-be-present-for-nerve-transfer-for-the-dynamic-reanimation-of-facial-paralysis

https://emedicine.medscape.com/article/879441-treatment

Myositis ossificans traumatica of the left masseter muscle presenting as soft tissue mass: a case report. ... Myositis ossificans traumatica of the left masseter muscle presenting as soft tissue mass: a case report. Bangladesh Journal of ... Myositis ossificans is a rare disease in which manifests as heterotopic bone formation within a muscle and is rarely found in ... the head or neck regions, including the masticator muscle. It should be considered as a differential diagnosis in patients of ...

https://imsear.searo.who.int/handle/123456789/167595

Note the contraction of the masseter and neck muscles. Source: PHIL Photo ID# 2857 ...

https://www.cdc.gov/tetanus/photos.html

Jaw Exercising Chew Ball for Masseter muscles, resistance training for jawline ...

https://www.go-vale.com/product-page/jaw-exerciser-chew-ball-for-masseter-muscles-resistance-training-jawline-def

https://en.wikipedia.org/wiki/Masseteric_nerve

Masseter muscle atrophy impairs bone quality of the mandibular condyle but not the alveolar process early after induction. J ... Unilateral masseter muscle hypertrophy: morphofunctional analysis of the relapse after treatment with botulinum toxin. Cranio. ... Three-dimensional assessment of enamel and dentine in mouse molar teeth during masseter muscle hypofunction Mastication, ... Nikkuni Y, Nishiyama H, Hyayashi T. The relationship between masseter muscle pain and T2 values in temporomandibular joint ...

https://estomatologia.univalle.edu.co/index.php/revista_estomatologia/%20article%20/view%20/7634

The aim of the study was to evaluate the delayed responses and changes of gradually lengthened masseter muscles of rabbit ... Histomorphometric evaluation of delayed changes in masseter muscle after lengthening the rabbit mandible by distraction ...

https://avesis.uludag.edu.tr/yayin/1cef2f74-d8e1-491c-9bf1-9a9455578a0d/histomorphometric-evaluation-of-delayed-changes-in-masseter-muscle-after-lengthening-the-rabbit-mandible-by-distraction-osteogenesis

Rabbits are capable of a wide variety of jaw movement due to 3 jaw-closing muscle groups (masseter, temporalis, pterygoid)... ...

https://awionline.org/content/refinement-database?f%5B0%5D=animal_type%3A332&f%5B1%5D=animal_type%3A347&f%5B2%5D=animal_type%3A365&f%5B3%5D=animal_type%3A368&f%5B4%5D=animal_type%3A371&f%5B5%5D=animal_type%3A379&f%5B6%5D=animal_type%3A395&f%5B7%5D=animal_type%3A402&f%5B8%5D=topic%3A384

Cortical adaptation to restoration of smiling after free muscle transfer innervated by the nerve to the masseter. Plastic and ... Cortical adaptation to restoration of smiling after free muscle transfer innervated by the nerve to the masseter. / Lifchez, ... title = "Cortical adaptation to restoration of smiling after free muscle transfer innervated by the nerve to the masseter", ... Cortical adaptation to restoration of smiling after free muscle transfer innervated by the nerve to the masseter. ...

https://www.scholars.northwestern.edu/en/publications/cortical-adaptation-to-restoration-of-smiling-after-free-muscle-t

Masseteric nerve - This nerve passes through the mandibular notch to innervate the masseter muscle and temporomandibular joint ... Motor to muscles of mastication. CN V innervates the muscles of mastication, mylohyoid, tensor tympani, tensor veli palate, ... Motor to muscles of mastication. CN V innervates the muscles of mastication, mylohyoid, tensor tympani, tensor veli palate, ... The proprioceptive fibers of CN V arise from the muscles of mastication and the extraocular muscles. They terminate in the ...

https://emedicine.medscape.com/article/1873373-overview

The injection of BTX-A into the masseter muscle induced muscle atrophy. Subsequently, p65 and S100 expression in myoblasts were ... U of BTX-A into both masseter muscle of rats. As a control group, the same volume of saline was injected. After 14 days, ... The purpose of this study was to compare the expression levels of p65 and S100 in the rat masseter muscle after the injection ... From: S100 and p65 expression are increased in the masseter muscle after botulinum toxin-A injection ...

https://jkamprs.springeropen.com/articles/10.1186/s40902-016-0079-8/figures/1

Masseter Ball Jawline Muscle Exerciser Chew Ball Food Grade Silicone Facial Mandible Trainer Face Fitness Balls 20-50 Pounds. $ ... Be the first to review "Masseter Ball Jawline Muscle Exerciser Chew Ball Food Grade Silicone Facial Mandible Trainer Face ... Hot Sale 10-200 Oil Cylinder Arm Strength Machine Home Exercise Arm Muscle Adjustable Exercise Equipment For Chest Muscle. ...

https://ibizdeals.com/product/masseter-ball-jawline-muscle-exerciser-chew-ball-food-grade-silicone-facial-mandible-trainer-face-fitness-balls-20-50-pounds/

Botox for the masseter muscle is ideal for patients who are clenching, grinding, and wearing down their teeth resulting in ... Botox for the Masseter Muscle - Incredible medical benefits of high-dose injection into the masseter muscle.. by Dr. Dina ... MASSETER MUSCLE TREATMENT TIPS. Botox for the masseter muscle is ideal for patients who are clenching, grinding, and wearing ... A clinical examination revealed a thick masseter muscle on this patient. The masseter muscle has a tendency to get thicker in ...

https://rolandparksmiles.com/botox-for-the-masseter-muscle/

muscles : Deutsch - Englisch Übersetzungen und Synonyme (BEOLINGUS Online-Dictionary, TU Chemnitz) ... muscles : German - English translations and synonyms (BEOLINGUS Online dictionary, TU Chemnitz) ... masticatory muscle; muscle of mastication; masseter (muscle) Kaumuskel {m} [anat.] masticatory muscles; muscles of mastication ... cardiac muscle; heart muscle; myocardium Herzmuskel {f}; Myokard {n} [anat.] cardiac muscles; heart muscles Herzmuskeln {pl}; ...

https://dict.tu-chemnitz.de/english-german/muscles.html

epaxial muscle tone palpation multifidus muscle tone palpation bilateral dorsal-ventral pressures T1-T9 bilateral dorsal- ... masseters palpation temporalis and frontalis palpation tartar and plaque build up mandibular lymph nodes palpation lateral ... epaxial muscle tone palpation multifidus muscle tone palpation quadratus lumborum tone palpation iliopsoas tone and pain ... carpal/digit flexor muscles palpation flexion end feel extension end feel supination end feel pronation end feel goniometry ...

https://form.jotform.com/220466301484047

What to Know About the Masseter Muscle. You have one masseter muscle on each side of your jaw. The masseter is the primary ... The palmaris brevis muscle lies just underneath the skin. It is a short muscle on the flat of the hand. The muscle begins at ... Superficial Muscles. Medically reviewed by the Healthline Medical Network. The muscles of the face give it general form and ... The supraspinatus muscle is a rotator cuff muscle located in the shoulder, specifically in the supraspinatus fossa, a concave ...

https://www.healthline.com/human-body-maps/ulna-bone

When paralysis is bilateral, the motor nerve to the masseter muscle may be used bilaterally to innervate the muscle transfer in ... During this procedure, a segment of muscle from elsewhere in the body, typically the gracilis muscle in the leg, is brought to ... Eye closure can be improved with a variety of procedures including lid loading, temporalis muscle transfer, or fascial or ... After facial reanimation surgery, exercise therapy strengthens and speeds muscle recovery and is essential to the success of ...

https://www.chop.edu/conditions-diseases/facial-motion-disorders

https://en.m.wikipedia.org/wiki/Temporomandibular_joint_dysfunction

Masseter muscle activity. Electromyograms of the bilateral masseter muscles were measured to monitor orofacial motor output ... When masseter muscle activity was compared between the types of gum, no significant difference was observed. Thus, there were ... Heart rate, autonomic nerve activity and masseter muscle activity. Figure 6 shows that the heart rate was significantly ... Bilateral hemodynamic responses in the frontal to parietal lobes, bilateral masseter muscle activation, and heart rate were ...

https://www.researchsquare.com/article/rs-379633/v1

Heres how a masseter massage can help relieve jaw pain from teeth grinding. ... The strongest muscle in your body is also the tightest. ... The masseter muscle is the strongest muscle in your body by ... "The masseter is one of three muscles known as elevator muscles, and those muscles are responsible for closing the mouth and ... How to give yourself a masseter massage. 1. Find it. The masseter muscle is located right along your cheeks on both sides of ...

https://www.wellandgood.com/masseter-massage/

... and in masseter muscles. Abnormalities were also observed in back muscles in 4 patients and in calf muscles in 2 patients. ... Two leg muscle biopsy specimens were obtained from 2 other patients who reported specific muscle pain and had changes ... One tissue sample was from the temporalis muscle of 1 patient, and the other was from the leg muscle of another patient. ... Mild myositis (inflammation) was observed in 3 muscle biopsy specimens examined.. Muscle tissues were ground with sterile glass ...

https://wwwnc.cdc.gov/eid/article/19/12/12-0530_article

Injection of botulinum toxin type A (Botox) into the masseter muscle was considered as less invasive modality for the treatment of muscle hypertrophy. (msprs.org.my)
Local injection of very small doses of the Botox into a muscle produces local paralysis and therefore, individual muscles can be selectively weakened and atrophy of the muscle occurs. (msprs.org.my)
Botox is an injectable muscle relaxer. (rolandparksmiles.com)
She underwent a simple and relative painless treatment with Botox in her masseter muscle to relax the muscle and not be able to grind, clench and bite down as hard. (rolandparksmiles.com)
This procedure is referred to as masseter reduction and can take 50-100 units of Botox per side depending on the size of the masseter muscle. (rolandparksmiles.com)
This is a typical reaction when a patient receives botox for the masseter muscle treatment and it gives me goosebumps every time. (rolandparksmiles.com)
The amount of Botox needed to treat this area ranges between 60 and 100 units of Botox, depending on the size or bulkiness of the muscle. (rolandparksmiles.com)
Botox for the masseter muscle is ideal for patients who are clenching, grinding, and wearing down their teeth resulting in needing a lot of expensive dental work. (rolandparksmiles.com)
Botox® is commonly used to temporarily paralyse muscles of the face to soften wrinkles, particularly those that occur due to facial expressions. (glowday.com)
How does Botox® for masseter muscle reduction work? (glowday.com)
When Botox® is injected into a muscle, the release of acetylcholine from the nerves stimulating that muscle is prevented. (glowday.com)
If you are self-conscious about having an overly square jaw, masseter muscle Botox® may be a potential treatment to narrow your jawline and produce a more v-shaped lower face. (glowday.com)
How should I prepare for a masseter Botox® treatment? (glowday.com)
What happens during a masseter Botox® treatment? (glowday.com)
Botox jaw reduction (also called jaw Botox) blocks nerve signals to the masseter muscles, allowing them to relax and shrink back down for a slimmer-looking jawline. (alluraderm.com)
As if that wasn't enough, Dr. Harutyunyan - who has not worked on Kardashian - added, "I suspect she has had Botox injections into her Masseter muscles, a very effective way to contour the jaw line by reducing the masseter shadow through the outer jaw skin. (radaronline.com)
The Botox must be injected superficially so as to not have an effect on the muscles if expression. (authenticbotulinum.com)
As stated earlier, you shouldn't inject Botox in the cheeks as a outcome of it'll have an result on the movement of the zygomaticus muscle which raises the corners and the higher lip. (authenticbotulinum.com)
Botox®, Dysport® and Xeomin® work to block acetylcholine, the nerve transmitter that causes muscles to contract. (drspiegel.com)
Botox®, Dysport® and Xeomin® relax the masseter muscles and can put an end to the grinding. (drspiegel.com)
A promising new therapy consists of relaxing the large masseter muscle with Botox. (esoterism.ro)
BOTOX for teeth grinding is administered with 4-6 injections into the lower part of the masseter muscle. (esoterism.ro)
Injection of Botox into the greater masseter muscle causes it to relax and stop teeth grinding at night. (esoterism.ro)
Or you may be familiar with how Botox can reduce wrinkles by reducing the intensity of muscle contractions. (reflectionscenter.com)
Botox for TMJ works in both of these ways, to reduce pain signals from TMJ and reduce the clenching and muscle tightness that TMJ causes. (reflectionscenter.com)
Your physician will place the Botox in the masseter muscle, which is connected to the jaw along the side of the face, ensuring that the product is deep enough into the muscle and distributed thoroughly through the area. (reflectionscenter.com)
This is relatively comfortable, and despite the fact that the masseter muscle is relatively thick, patients don't feel additional pain compared to other Botox injections. (reflectionscenter.com)
I got a chemical peel off Groupon and decided to get botox in my masseters and lip fillers there too cause I always wanted to try it and my godddddd! (cskimplastics.com)
The treatment is quite simple: the Botox service provider will utilize a needle to inject Botox into a specific muscle. (prscd.com)

Finally, the muscle undergoes spasm with malignant hyperthermia as do other skeletal muscles, but this one is easily noted, since it is on the face. (wikipedia.org)
1 It has also been known to cause significant masseter spasm in children when used in conjunction with volatile anaesthetics such as halothane. (bmj.com)
2- 5 In adults, succinylcholine can also produce transient masseter spasm that resolves when fasciculation stops. (bmj.com)
We present a case of succinylcholine induced masseter spasm in the emergency department requiring surgical cricothyroidotomy for airway control. (bmj.com)
We believe that this is the only reported case of masseter spasm resulting in a failed airway requiring surgical cricothyroidotomy during rapid sequence intubation. (bmj.com)
Succinylcholine Induced Masseter Muscle Spasm during Rapid Sequence Induction in a Pregnant Patient with Kypho- Scoliosis: Case Report. (aimdrjournal.com)

In human anatomy, the masseter is one of the muscles of mastication. (wikipedia.org)
The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest. (wikipedia.org)
Along with the other three muscles of mastication (temporalis, medial pterygoid, and lateral pterygoid), the masseter is innervated by the anterior division of the mandibular division (V3) of the trigeminal nerve. (wikipedia.org)
The essential role of masseter muscle is for adequate mastication. (msprs.org.my)
It is the motor nerve for the muscles of mastication and contains proprioceptive fibers. (medscape.com)
The mesencephalic nucleus is in the midbrain and receives proprioceptive fibers from all muscles of mastication. (medscape.com)
The proprioceptive fibers of CN V arise from the muscles of mastication and the extraocular muscles. (medscape.com)
The motor nucleus of CN V receives cortical fibers for voluntary control of the muscles of mastication. (medscape.com)
Temporomandibular joint dysfunction ( TMD , TMJD ) is an umbrella term covering pain and dysfunction of the muscles of mastication (the muscles that move the jaw) and the temporomandibular joints (the joints which connect the mandible to the skull ). (wikipedia.org)
[2] Another definition of temporomandibular disorders is "a group of conditions with similar signs and symptoms that affect the temporomandibular joints, the muscles of mastication, or both. (wikipedia.org)
All 8 patients showed changes in muscles of mastication, including superficial temporalis and deep temporalis, and in masseter muscles. (cdc.gov)
Therefore, mastication continues the process of stimulation of the orofacial muscles that began with sucking at the breast. (biomedcentral.com)
The muscles of mastication are a subgroup of the muscles of the head. (visiblebody.com)
The muscles of mastication include: the temporalis, masseter, and the pterygoids (pterygoid internal and pterygoid external). (visiblebody.com)
These muscles work together to act on the temporomandibular joint and produce the motions involved in mastication. (visiblebody.com)
The study, published in the Annals of Anatomy , proposes that the structure be given the name " Musculus masseter pars coronidea or the coronoid section of the masseter" - because it's attached to the lower jaw's coronoid process, a bony projection that aids in mastication. (zmescience.com)
The masseter is a major muscle of mastication that tightens when you clench your teeth, whose structure has already raised questions. (zmescience.com)
Producing the body's ability to close the mouth, bite, and chew food, the muscles of mastication move the mandible relative to the rest of the skull. (innerbody.com)
The muscles of the head are divided into two large groups - the mimic muscles and the muscles of mastication. (drawingforall.net)
The main function of the muscles of mastication is to move the lower jaw to grind food. (drawingforall.net)
The buccinator muscle is quite large, it is slightly overlapped by the muscles of mastication (we will discuss it soon), the zygomatic muscles, and is completely overlapped by the buccal fat pad. (drawingforall.net)
When you grind your teeth, these muscles of mastication are in overdrive. (drspiegel.com)
However, species whose skulls are impacted by strong muscular stresses - particularly those produced through mastication of tough food items - may not display such intrinsic patterns very clearly because of the known plastic response of bone to muscle activity of the individual. (biomedcentral.com)
TMD is classified as dysfunction of the temporomandibular joint (TMJ) , your jaw, or your muscles of mastication (the muscles you use to chew). (catalystptandwellness.com)
Causes of TMD include hyperactivity of the muscles of mastication, stress, anxiety, trauma, sleeping disorders, and even dysfunction of the cervical spine (your neck). (catalystptandwellness.com)
The trigeminal nerve, a nerve that innervates your upper cervical spine, also innervates your muscles of mastication. (catalystptandwellness.com)
A physical therapist can help you with body work on those painful muscles of mastication, treating those tight muscles of your neck, improve that forward head posture, and facilitate proper mechanics at the TMJ to improve mouth opening and closing to allow you to eat pain free! (catalystptandwellness.com)
Efferent innervation supplies muscles of mastication, the tongue, and autonomic reflexes. (medscape.com)
The curved arc of the temporal line is palpable at the lateral limits of the forehead and is made more apparent with the action of the temporalis muscle with mastication. (medscape.com)

Purpose: The purpose of this study was to evaluate the relationship between masseter muscle thickness, facial morphology, and mandibular morphology in Korean adults using ultrasonography. (elsevier.com)
10. Nikkuni Y, Nishiyama H, Hyayashi T. The relationship between masseter muscle pain and T2 values in temporomandibular joint disorders. (univalle.edu.co)

musculus masseter. (wikipedia.org)
Buccinator muscle, Incisivus superior and incisivus inferior muscles, levator labii inferioris or levator menti muscle, compressor naris muscle, depressor alae masi muscle, levator anguli oris muscle, or musculus caninus. (creighton.edu)
When conventional therapy recommendations are of no avail or cannot be followed through by the patient (this is referred to as "lack of compliance"), there is recently the possibility of using the masseter muscle ( Musculus masseter ) with the aid of botulinum toxin. (esoterism.ro)

The coronoid head of the masseter's tendon and muscle fibers run posterolaterally from the coronoid process of the mandible towards the posterior third of the zygomatic arch. (wikipedia.org)
The action of the muscle during bilateral contraction of the entire muscle is to elevate the mandible, raising the lower jaw. (wikipedia.org)
Dissection, showing salivary glands of right side (Masseter visible at center) Left temporal bone, outer surface Left temporal bone, inferior surface Left zygomatic bone, temporal surface Mandible, outer surface, side view The arteries of the face and scalp. (wikipedia.org)
The surgery to access the masseter muscles and the mandible (jawbone) is performed through incisions on the inside of the mouth, between the gum and cheek (lower buccal sulcus area), leaving no visible scarring. (msprs.org.my)
The deep fibres of this muscle also retrude the mandible. (aberdeenchiropracticblog.com)
When performed correctly, it also plays a role in the development of the maxilla and mandible and contributed, together with genetic and environmental factors, to the stability of dental occlusion and functional and muscle balance. (biomedcentral.com)
The University of Basel has performed extensive dissection in human specimens to identify the fabled 'third' layer of the masseter muscle - which connects the mandible or lower jaw to the skull and is critical for chewing. (zmescience.com)
The zygomatic arch actually serves as a firm bony origin for the powerful masseter muscle, which descends from it to insert on the outer side of the mandible. (britannica.com)
The masseter muscle shares with the temporalis muscle and lateral and medial pterygoid muscles the function of elevating the mandible in order to bring the lower against the upper teeth, thus achieving bite. (britannica.com)
Ameloblastoma is a benign dental tumor mostly found in the mandible, with several variations El ameloblastoma es un tumor odontogénico benigno que se encuentra mayormente en la mandíbula 80%) usually found in the mandible, making up about 1% of tumors in the oral region.2 ameloblastoma . (udea.edu.co)

This patient presented with facial tetany, involving contraction of the masseter, which is visible here, and his neck muscles, which are not visible here. (cdc.gov)

Following the first treatment, the masseter muscle will atrophy (waste away slightly). (glowday.com)
Muscle changes, notably atrophy, have also been seen. (msdvetmanual.com)
In dairy cattle with brown atrophy, the skeletal muscles and myocardium are yellow-brown to bronze. (msdvetmanual.com)

It passes laterally, above the lateral pterygoid muscle, in front of the temporomandibular articulation, and behind the tendon of the temporalis muscle. (wikipedia.org)
Eye closure can be improved with a variety of procedures including lid loading, temporalis muscle transfer, or fascial or tendon slings. (chop.edu)
A biopsy specimen was obtained from the temporalis muscle of 1 of these patients. (cdc.gov)
Attached to it is the temporalis muscle, which serves with other muscles in shutting the jaws. (britannica.com)

Even if the hypertrophy is bilateral, asymmetry of the face may still occur due to unequal enlargement of the muscles. (wikipedia.org)
In most cases of masseter hypertrophy, it is bilateral and symmetric, but asymmetry is not unusual. (msprs.org.my)
When bilateral paralysis and paresis preclude use of the contralateral facial nerve, the authors' preferred donor nerve for reinnervation of free muscle transfer is a branch of the trigeminal nerve, the ipsilateral nerve to the masseter. (northwestern.edu)
When paralysis is bilateral, the motor nerve to the masseter muscle may be used bilaterally to innervate the muscle transfer in separate single stage procedures. (chop.edu)
Bilateral hemodynamic responses in the frontal to parietal lobes, bilateral masseter muscle activation, and heart rate were measured during gum-chewing. (researchsquare.com)
Specifically, bilateral and unilateral clenches (using muscle data) were studied using a low-profile 3D 4 × 2 hole mini-plate deployed for fracture fixation. (scirp.org)

IMSEAR at SEARO: Myositis ossificans traumatica of the left masseter muscle presenting as soft tissue mass: a case report. (who.int)
Ahmad K, Ansari S, Dhungel K, Gupta M K, Rauniyar R K, Amanullah M F. Myositis ossificans traumatica of the left masseter muscle presenting as soft tissue mass: a case report. (who.int)
Treated individuals received each one BoNTA intervention in the right masseter, and saline solution in the left masseter (intra-individual control). (univalle.edu.co)

Place the fingers of each hand over the muscle and ask the patient to clench his or her teeth several times. (wikipedia.org)
The masseter muscle can become enlarged in patients who habitually clench or grind (with bruxism) their teeth and even in those who constantly chew gum. (wikipedia.org)
This muscle commonly harbours trigger points as a result of teeth grinding. (aberdeenchiropracticblog.com)
The masseter muscle has a tendency to get thicker in individuals who grind their teeth or have Bruxism - which is clenching tightly at night due to anxiousness, stress or out of a habit. (rolandparksmiles.com)
The masseter is the primary muscle that brings your teeth together when you're chewing. (healthline.com)
The masseter is one of three muscles known as elevator muscles, and those muscles are responsible for closing the mouth and setting the teeth together so we can chew. (wellandgood.com)
Some people have overdeveloped masseter muscles, which can present as a wide, square jawline, teeth grinding (bruxism) and jaw pain. (glowday.com)
The main muscle involved in teeth grinding is thus specifically eliminated for several months. (esoterism.ro)

skeletal muscles - under a microscope the dark & light bands in the muscle fibers create a striped appearance. (studystack.com)
This initially involves consecutively the levator muscles of the face, muscles of the glottis and finally the intercostals and the diaphragm and all other skeletal muscles. (nih.gov)
As you know, bones are the attachment points for common skeletal muscles. (drawingforall.net)
Mimic muscles, unlike other skeletal muscles, attach directly to the skin of the face and set in motion the skin of the face. (drawingforall.net)
Fasciae are dense connective tissue membranes that cover almost all of the human skeletal muscles. (drawingforall.net)

There have been rare reports of acute rhabdomyolysis with hyperkalemia followed by ventricular dysrhythmias, cardiac arrest and death after the administration of succinylcholine to apparently healthy pediatric patients who were subsequently found to have undiagnosed skeletal muscle myopathy, most frequently Duchenne's muscular dystrophy. (nih.gov)
Succinylcholine Chloride Injection, USP is a sterile, nonpyrogenic solution to be used as an ultra short-acting, depolarizing, skeletal muscle relaxant See HOW SUPPLIED for summary of content and characteristics of the solutions. (nih.gov)
Succinylcholine is a depolarizing skeletal muscle relaxant. (nih.gov)
The paralysis following administration of succinylcholine is progressive, with differing sensitivities of different muscles. (nih.gov)
Succinylcholine has no direct action on the uterus or other smooth muscle structures. (nih.gov)
ECT results in direct stimulation of the masseter, temporalis, and pterygoid muscles which is not attenuated by administration of succinylcholine. (scirp.org)
Malignant hyperthermia (MH) is a rare (1:15,000 in pediatric patients and 1:40,000 adult patients) genetic hypermetabolic muscle disease, the charac-teristic phenotypical signs and symptoms of which most commonly appear with exposure to inhaled general anesthetics or succinylcholine (triggering agents). (brainkart.com)

In the temporal region the auricular muscles, orbicularis oculi muscle, galea aponeurotica and underlying temporal fascia have been resected but superficial branches of nerves and arteries have been preserved. (stanford.edu)
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 be an interesting aid in dental clinical practice. (thejcdp.com)
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. (thejcdp.com)
Electromyography is a noninvasive exam which evaluates the masticatory muscle activity by facial application of electrodes on masseter and temporal muscles. (thejcdp.com)

The masseter parallels the medial pterygoid muscle, but it is stronger and superficial fibres can cause protrusion. (wikipedia.org)
Rabbits are capable of a wide variety of jaw movement due to 3 jaw-closing muscle groups (masseter, temporalis, pterygoid). (awionline.org)
The medial pterygoid is another muscle that is overactive and can result in jaw pain/limitations. (catalystptandwellness.com)

The masseteric nerve supplies the masseter muscle. (wikipedia.org)
When cases are unilateral, a two-stage procedure usually is preferred using a cross facial nerve graft technique to innervate the free muscle transfer. (chop.edu)
Prevalence and predictors of peripheral neuropathy in non-diabetic children with chronic kidney disease .Yoganathan S ,Bagga A , Gulati S, Toteja GS,Hari P, Sinha A, Pandey, Irshad M.Muscle & Nerve. (aiims.edu)
stimulation of a muscle by an impulse transmitted by a motor nerve. (studystack.com)
The first complete description of this muscle involves a layer possessing a separate nerve and blood supply that begins at the zygomatic process - a bony projection that forms part of the cheekbones. (zmescience.com)
The posterior auricular nerve is a motor branch of the facial nerve (CN VII) that innervates the posterior and intrinsic auricular muscles. (tabers.com)
A sensory branch of the mandibular nerve (CN V3) It passes through the parotid gland en route to the ear, where it innervates skin of the pinna, external auditory canal, and tympanic membrane. (tabers.com)
These treatments function by briefly obstructing nerve signals and also muscle contractions in the areas where they're injected. (collagenrestore.net)

Incredible medical benefits of high-dose injection into the masseter muscle. (rolandparksmiles.com)

Masseter hypertrophy is recognized as an asymptomatic enlargement of one or both masseter muscles. (msprs.org.my)
Conservative management of the idiopathic masseter hypertrophy includes psychological counselling, use of mouth guards, muscle relaxant, anxiolytic drugs, analgesics, physical therapy, dental restorations, and occlusal adjustments to correct premature contacts. (msprs.org.my)
Unilateral masseter muscle hypertrophy: morphofunctional analysis of the relapse after treatment with botulinum toxin. (univalle.edu.co)
It is also used to treat hyperhidrosis (excessive underarm sweating), as well as MMH (Masseter Muscle Hypertrophy), a condition that creates a square, masculine-looking jaw. (richardswiftmd.com)

Both merchandise are given as injections into the muscles of the face, neck or head, relying upon the use. (authenticbotulinum.com)
In people with strabismus (crossed eyes), Botulinum injections are administered directly into the affected eye in an effort to relax the muscles responsible for the squinting and in most cases, this enables the eyes to re-align correctly. (drspiegel.com)

Tetanus is characterized by painful muscular contractions, primarily of the masseter, and other large muscles. (cdc.gov)
The muscle contractions are weakened, preventing the masseter muscle from contracting so much. (glowday.com)

The masseter muscle is the muscle which runs along your jawline near the ear. (glowday.com)
This injectable neuromodulator achieves non-surgical jawline contouring through reduction of the masseter muscles. (alluraderm.com)

The depressor labii inferioris muscle is a four-sided facial muscle located in the jaw area that draws the lower lip down and to the side. (healthline.com)
Depressor anguli oris or triangularis menti muscle, risorius muscle, zygomaticus major muscle, levator labii superioris alaeque nasi, levator labii superioris proprius, and zygomaticus minor muscles, orbicularis palpebrarum muscle. (creighton.edu)

Oxygen saturation in the masseter muscle was measured using near-infrared spectroscopy (NIRS) during unilateral chewing of a silicon device. (unimi.it)
As reported, the unilateral masseter hypofunction induced by botulinum toxin type A (BoNTA) resulted in mandibular bone damage and signs of unilateral chewing in adult mice. (univalle.edu.co)
We aimed to assess the amount of enamel and dentine in the first molar (M1) during the unilateral masseter hypofunction in mice, using high-resolution X-ray microtomography (μCT) as threedimensional approach. (univalle.edu.co)
Enamel volume from treated side resulted unchanged after 2 weeks of unilateral masseter hypofunction. (univalle.edu.co)
The amount of enamel in hypofunctional molars remains unaffected after unilateral BoNTA intervention in the masseter, but contralateral side showed reduced enamel volume. (univalle.edu.co)
during unilateral contraction, the muscle pulls the corner of the mouth laterally. (drawingforall.net)

Unlike surgical excision of muscle tissue that reduces the actual number of muscle cells, botulinum toxin type A only reduces muscle volume temporarily. (msprs.org.my)

To perform an extraoral examination, stand near the patient and visually inspect and bilaterally palpate the muscle. (wikipedia.org)
Materials and Methods: Ultrasonography was used to measure the masseter muscle thickness bilaterally of 40 adults (20 males, 20 females) and was performed in the relaxed and contracted states. (elsevier.com)

Intramuscular hemodynamic responses to sustained masseter muscle extension in humans. (elsevier.com)

Singers often experience various kinds of masseter tension, which is often treated with transdermal massages or stretches as a vocal warm-up. (wikipedia.org)
Meals that seem delicious relieve muscle tension and relax the mind and body 6 . (researchsquare.com)
Like any other sore muscle, it's important to relieve the tension before it becomes chronically problematic," says Dr. Chern. (wellandgood.com)
Various medications can be taken before bedtime to reduce muscle tension during periods of intense bruxism (e.g., benzodiazepines). (jeancoutu.com)
This is a problem with your jaw joint which causes tension in your massetter muscles and also leading to types of. (healingwell.com)
I am getting these bad tension headaches which i think the main cause of it is from the muscle in my jaw joints. (healingwell.com)
If the masticatory muscles are traumatized to the point of chronic tension, then individual muscle areas can harden and lead to chronic pain. (esoterism.ro)

Seaters train the masseter muscles, which elevate the jawbone, and give braces and aligners a nice fit. (nwph.net)
These muscles, including the masseter and temporalis, elevate the jaw forcefully during chewing and gently during speech. (innerbody.com)

Necks of double-muscled cattle are shorter and thicker, and their heads appear smaller. (msdvetmanual.com)

The first classification, MTMD, pertains to pain in your jaw originating from your chewing muscles: masseters, pterygoids, and temporalis. (catalystptandwellness.com)

As for the eye, six extrinsic eye muscles provide superior, inferior, lateral, and medial motion, as well as rotation of the eyeball. (innerbody.com)
It runs in the subarachnoid space and the cavernous sinus inside the skull, enters the back of the orbit through the superior orbital fissure, and innervates the lateral rectus muscle. (tabers.com)

It can take up to 24 hours for the treated muscles to relax, which in turn helps minimize the appearance of fine lines or wrinkles. (richardswiftmd.com)

The neck muscles, including the sternocleidomastoid and the trapezius, are responsible for the gross motor movement in the muscular system of the head and neck. (innerbody.com)
Neck muscles contract to adjust the posture of the head throughout the course of a day and have some of the greatest endurance of any muscles in the body. (innerbody.com)
Tight neck muscles that get worse from sitting and using your phone and computer? (catalystptandwellness.com)

Myositis ossificans is a rare disease in which manifests as heterotopic bone formation within a muscle and is rarely found in the head or neck regions, including the masticator muscle. (who.int)
Localízed eosinophilic myositis of the masseter muscle associated with actinomycosis. (udea.edu.co)
Two leg muscle biopsy specimens were obtained from 2 other patients who reported specific muscle pain and had changes consistent with myositis by MRI. (cdc.gov)

The muscles of the face give it general form and contour, help you outwardly express your feelings, and enable you to chew your food. (healthline.com)

The muscle function may also be impaired, thus resulting in conditions such as trismus, protrusion, and bruxism. (msprs.org.my)
With prolonged clenching (Bruxism) and grinding, that muscle gets thicker and thicker over time, which leads to a wider and square face. (rolandparksmiles.com)
ACTN3 genotype influences masseter muscle characteristics and self-reported bruxism. (cdc.gov)

While most muscles connect to and move only bones, facial muscles mostly connect bones to skin. (innerbody.com)
Another feature of the facial muscles is the absence of fascia. (drawingforall.net)
The facial muscles are completely devoid of the fascia. (drawingforall.net)
The treatment works by relaxing specific facial muscles so that the drooping is not as evident or so that only the desired muscle contracts. (drspiegel.com)

Microscopically, brown lipofuscin pigment granules accumulate under the sarcolemma or centrally in the muscle fibers. (msdvetmanual.com)
She adds that the arrangement of the muscle fibers suggests that this layer is involved in stabilizing the lower jaw and appears to be the only part of the masseter that can pull it back towards the ear. (zmescience.com)
Due to the direction of its fibers and the position of its attachments, the team suggests that this layer provides further stabilization of the lower jaw, making it an essential part of the masseter muscle. (zmescience.com)
If you love to cook meat, you have probably seen dense white films that are located on muscle fibers - these are fascia. (drawingforall.net)

Conclusion: Masseter muscle thickness was associated with facial and mandibular morphology in both sexes, and with age in males. (elsevier.com)
This bulky muscle is located laterally to the mandibular ramus, and thus plays an important role in facial aesthetics. (msprs.org.my)
It crosses the mandibular notch to reach masseter muscle. (wikipedia.org)
Also as expected, the main variation was in the muzzle, zygomatic arches, and masticatory muscle attachments of the mandibular ramus. (biomedcentral.com)

The aim of the treatment is to improve facial balance, change the shape of an overly square face and relief pain or discomfort as a result of an overly large masseter muscle. (msprs.org.my)
These jaw muscles, used for chewing, can overdevelop as a result of repeated muscle movements, creating an overly square appearance. (alluraderm.com)

In panoramic radiography, correlations were found between anterior angle length and posterior angle length and masseter muscle thickness in females, and between body length and posterior angle length, between anterior angle length and body length, between ramal length and body length, and between body length and condyle length in males. (elsevier.com)
It ramifies nearly as far as the anterior border of the masseter muscle. (wikipedia.org)
The newly discovered muscle layer runs from the back of the cheekbone to the anterior muscular process of the lower jaw. (zmescience.com)
The anterior portions of the occipitofrontalis muscle- the frontalis and the pyramidalis nasi muscles. (creighton.edu)
Auricularis superior or attollens auriculam and auicularis anterior or attrahens auriculam muscles. (creighton.edu)
These two muscles are fairly easy to find, as they both start from the anterior surface of the zygomatic bone. (drawingforall.net)

Interestingly, 70% of TMD sufferers report masticatory muscle pain and are described as suffering from myofascial TMD, [iv] despite the fact that there is little evidence of ongoing pathological change in masticatory muscles. (greenmedinfo.com)
Compared to placebo, patients receiving CBD therapy experienced symptomatic improvements, including reduced myofascial pain severity and decreased masseter muscle (the muscle around the jaw) activity. (norml.org)

The masseter muscle is the strongest muscle in your body by weight . (wellandgood.com)
In terms of the exertion of pressure, the strongest muscle in the human anatomy would be considered the masseter, or the muscle of the jaw. (reference.com)

In panel C, mean baseline positions of laryngeal sites of horses are indicated by squares, mean positions following stimulation of thyrohyoideus muscles of horses in the present study are indicated by circles, and mean positions following placement of a prosthetic suture for horses in another study 15 are indicated by triangles. (avma.org)

Functional interactions between NMDA receptors and TRPV1 in trigeminal sensory neurons mediate mechanical hyperalgesia in the rat masseter muscle. (neuromics.com)

Immediate effect of a stabilization splint on masticatory muscle activity in temporomandibular disorder patients. (thejcdp.com)
Craniomandibular disorders and masticatory muscle function. (thejcdp.com)

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. (thejcdp.com)
607. Muscles on the posterior and outer sides of the right thigh. (creighton.edu)

Finally, the scientists compared these thin slices with magnetic resonance imaging of a living person, which produced a detailed picture of the masseter muscle and connective tissues to give an overall view of the new layer. (zmescience.com)

I in thn thicker walls of the rectus muscle, these belonging to form a fully-form«l sponge. (juanfreire.com)

The deep head of the muscle is partly concealed, anteriorly, by the superficial portion. (wikipedia.org)
545. The superficial layer of the muscles of facial expression and their relation to the platysma myoides. (creighton.edu)
570. The superficial layer of the palmar group of muslces of the right forearm, pronator radii teres muscle, flexor carpi radialis muscle, palmaris longus muscle, flexor carpi ulnaris muscle. (creighton.edu)
The superficial layer of the radial group of muscles: supinator radii longus muscle, and a portion of the extensor carpi radialis longior muscle. (creighton.edu)

A clinical examination revealed a thick masseter muscle on this patient. (rolandparksmiles.com)

Objective: The objective of the present study is to investigate if changes in the oxygen saturation of masseter muscle during a chewing task can differentiate patients with myogenic temporomandibular disorders (TMD) from healthy subjects and if these differences are related to the gravity of the disorder and to the orofacial myofunctional status. (unimi.it)
Patients with myogenic temporomandibular disorders have reduced oxygen extraction in the masseter muscle / C.L.P. Ferreira, G. Bellistri, S. Montagna, C.M. de Felício, C. Sforza. (unimi.it)

Both parts of the muscle connect to a dense tendon plate called a galea aponeurotica. (drawingforall.net)

The masseter muscle is located right along your cheeks on both sides of your jaw, running vertically from in front of your ear to the angle of your jaw. (wellandgood.com)

1,500 limb muscle biopsy specimens in the past 20 years for various muscle diseases at the University of Malaya Medical Centre did not yield any sarcocyst-positive tissues (K.T. Wong, unpub. (cdc.gov)

Human anatomy still has a few surprises in store for us: researchers at the University of Basel have discovered a previously overlooked section of our jaw muscles and described this layer in detail for the first time. (myscience.ch)

Anatomy33

Diseases10

Chemicals and Drugs4

Analytical, Diagnostic and Therapeutic Techniques and Equipment7

Psychiatry and Psychology1

Phenomena and Processes6

Health Care1

Activation of peripheral GABAA receptors inhibits temporomandibular joint-evoked jaw muscle activity. (1/310)

Halothane induces calcium release from human skinned masseter muscle fibers. (2/310)

Jaw reflexes evoked by mechanical stimulation of teeth in humans. (3/310)

Muscle spindle afferent input to motoneurons in human masseter. (4/310)

Jaw reflexes in healthy old people. (5/310)

Behavior of jaw muscle spindle afferents during cortically induced rhythmic jaw movements in the anesthetized rabbit. (6/310)

Global field power helps separate respiratory-related evoked potentials from EMG contamination. (7/310)

Contribution of supraglottal mechanoreceptor afferents to respiratory-related evoked potentials in humans. (8/310)

Masseter Muscle

Masticatory Muscles

Temporal Muscle

Mastication

Bite Force

Jaw

Pterygoid Muscles

Muscles

Zygoma

Vertical Dimension

Stomatognathic System

Muscle Fibers, Skeletal

Trigeminal Nuclei

Muscle Contraction

Electromyography

Sucking Behavior

Facial Muscles

Muscle, Skeletal

Mandible

Dental Occlusion

Facial Pain

Muscle Rigidity

Muscle Fibers, Slow-Twitch

Muscle Proteins

Skeletal Muscle Myosins

Muscle Spindles

Muscle, Smooth

Myosin Heavy Chains

Temporomandibular Joint

Chin

Muscle Fibers, Fast-Twitch

Sella Turcica

Muscle Development

Nasal Bone

Muscle, Smooth, Vascular

Trigeminal Nerve

Succinylcholine

Temporomandibular Joint Dysfunction Syndrome

Cephalometry

Overbite

Maxilla

Facial Bones

Maxillofacial Development

Dental Arch

Diagnostic Techniques, Otological

Anatomic Landmarks

Facial Asymmetry

Neck Muscles

Hypertrophy

Lingual Nerve

Temporomandibular Joint Disorders

Mandibular Nerve

Open Bite

Muscle Fatigue

Trigeminal Ganglion

Malocclusion, Angle Class II

Muscle Denervation

Malocclusion, Angle Class I

Motor Neurons

Face

Activation of peripheral GABAA receptors inhibits temporomandibular joint-evoked jaw muscle activity. (1/310)

Halothane induces calcium release from human skinned masseter muscle fibers. (2/310)

Jaw reflexes evoked by mechanical stimulation of teeth in humans. (3/310)

Muscle spindle afferent input to motoneurons in human masseter. (4/310)

Jaw reflexes in healthy old people. (5/310)

Behavior of jaw muscle spindle afferents during cortically induced rhythmic jaw movements in the anesthetized rabbit. (6/310)

Global field power helps separate respiratory-related evoked potentials from EMG contamination. (7/310)

Contribution of supraglottal mechanoreceptor afferents to respiratory-related evoked potentials in humans. (8/310)

Nocturnal masseter muscle activity and urinary catecholamine levels in bruxers<...

The trophic effect of ciliary neurotrophic factor on injured masseter muscle in rat - Mashhad University of Medical Sciences...

Serotonin, glutamate and glycerol are released after the injection of hypertonic saline into human masseter muscles - a...

Effect of Short-Term Forward Head Posture Correction for Masseter Muscle Activity and Temporomandibular Joint Function for...

Indices of extracellular matrix turnover in human masseter muscles as markers of craniofacial form-a preliminary study : The...

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YUHSpace: The relationship between masseter muscle thickness measured by ultrasonography and facial profile in young Korean...

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Masseter | Article about masseter by The Free Dictionary