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  2. Muscles of mastication - Wikipedia

    en.wikipedia.org/wiki/Muscles_of_mastication

    The four classical muscles of mastication elevate the mandible (closing the jaw) and move it forward/backward and laterally, facilitating biting and chewing. Other muscles are responsible for opening the jaw, namely the geniohyoid , mylohyoid , and digastric muscles (the lateral pterygoid may play a role).

  3. Temporomandibular joint - Wikipedia

    en.wikipedia.org/wiki/Temporomandibular_joint

    Contraction of the lateral pterygoid acts to pull the disc and condyle forward within the glenoid fossa and down the articular eminence; thus, the action of this muscle serves to protrude the jaw, it with the assistance of gravity, and the digastricus muscle also opens the jaw. The other three muscles close the mouth; the masseter and the ...

  4. Temporomandibular joint dysfunction - Wikipedia

    en.wikipedia.org/wiki/Temporomandibular_joint...

    Pain and tenderness on palpation in the muscles of mastication, or of the joint itself (preauricular painpain felt just in front of the ear). Pain is the defining feature of TMD and is usually aggravated by manipulation or function, [ 2 ] such as when chewing, clenching, [ 12 ] or yawning, and is often worse upon waking.

  5. Temporalis muscle - Wikipedia

    en.wikipedia.org/wiki/Temporalis_muscle

    The temporalis muscle is covered by the temporal fascia, also known as the temporal aponeurosis. This fascia is commonly used in tympanoplasty, or surgical reconstruction of the eardrum. The temporalis muscle is accessible on the temples, and can be seen and felt contracting while the jaw is clenching and unclenching.

  6. Digastric muscle - Wikipedia

    en.wikipedia.org/wiki/Digastric_muscle

    The digastric muscle (also digastricus) (named digastric as it has two 'bellies') is a bilaterally paired suprahyoid muscle located under the jaw.Its posterior belly is attached to the mastoid notch of temporal bone, and its anterior belly is attached to the digastric fossa of mandible; the two bellies are united by an intermediate tendon which is held in a loop that attaches to the hyoid bone.

  7. Muscle Loss In This Area Could Be a Key Indicator of ... - AOL

    www.aol.com/muscle-loss-area-could-key-130000809...

    The researchers looked at the temporalis muscles, which are related to the jaw, on MRI images. Participants were then grouped into categories based on their muscle size.

  8. Oromandibular dystonia - Wikipedia

    en.wikipedia.org/wiki/Oromandibular_dystonia

    Oromandibular dystonia (OMD) is an uncommon focal neurological condition affecting the jaws, face, and mouth. [1] Oromandibular dystonia is characterized by involuntary spasms of the tongue, jaw, and mouth muscles that result in bruxism , or grinding of the teeth , and jaw closure.

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