MUSCLES OF MASTICATION
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are the Mandibular Elevator muscles? | 1)Temporalis 2)Masseter 3)Medial (internal) pterygoid
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| What are the Mandibular Depressors? | MeG's lap: 1)Mylohyoid 2)Geniohyoid 3)Lateral (external) pterygoid 4)Anterior Belly of Digastric5)Posterior belly of digastric
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| O:lower border of mandible I:lesser horn of hyoid | Anterior Belly of Digastric
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| C:inferior and posterior F:depresses mandible | Anterior Belly of Digastric
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| O:mastoid process of temporal bone I:meets anterior belly at intermediate tendon | Posterior belly of digastric
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| C:inferior and anteriorF:depresses mandible | Posterior belly of digastric
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| Muscular floor of mouth | Mylohyoid
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| O:inner surface on mandible near mental symphysis to last molarI:meets fibers from other side; posterior fibers insert directly into hyoid I:meets fibers from other side; posterior fibers insert directly into hyoid | Mylohyoid
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| C:inferior and mediallyF:minimal help in lowering jaw | Mylohyoid
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| O:lower part of mental symphysis I:body of hyoid | Geniohyoid
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| C:posterior and inferior F:depresses mandible | Geniohyoid
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| O:greater wing of sphenoid and lateral pterygoid plateI:condyle of mandible | Lateral (external) pterygoid
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| C:horizontally and posteriorly F:protrudes mandible by sliding condyle down and forward | Lateral (external) pterygoid
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| used to produce /a/ & stops | Lateral (external) pterygoid
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| very powerful muscle that elevates the mandible | Masseter
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| O:zygomatic arch I:angle, ramus and coronoid process | Masseter
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| C:inferior and posterior F:elevates jaw | Masseter
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| O:entire temporal bone I:anterior border of ramus and along coronoid process | Temporalis
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| C:fibers converge as they travel inferiorly under the zygomatic arch F:elevates and retracts mandible | Temporalis
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| O:between lateral and medial pterygoid plates of the sphenoid I:medial surface of ramus and angle of mandible | Medial (internal) pterygoid
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| C:inferior, posterior and laterally F:forms a sling with masseter to elevate mandible | Medial (internal) pterygoid
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aramos139
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