(CN) The Head
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 muscles depress the TMJ (open the mouth)? | Lateral pterygoid, Suprahyoid, Infrahyoid
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| What muscles elevate the TMJ (Close the mouth)? | Temporalis, Masseter, Medial pterygoid
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| What muscles protrude the TMJ? | Masseter, Lateral Pterygoid, Medial Pterygoid
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| What muscles deviate the TMJ from side to side? | Medial pterygoid, Lateral pterygoid, Masseter, Temporalis
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| What muscles retract the TMJ? | Temporalis, Masseter, Digastric
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| Which muslces flex the head and neck? | SCM, Longus Coli, Scalenes
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| Which muscles Extend the head and neck? | Splenius cervicis, Spemispinalis, Iliocostalis, Logissiumus, Multifidus, Trapezius
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| Which muscles rotate and laterally bend the head and neck? | SCM, Scalenes, Splenius, Longissimus, Iliocostalis, Levator scapulae, Multifidus
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| what is the functional opening of the mouth | 25-35 mm
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| full opening of mouth | 35-50 min
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| how much is the lateral excursion or deviation | 10-15 mm
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| how much is the protrusion forward | 3-6 mm
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| how much is the retraction | 3-4 mm
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| what happens with openning | anterior rotation 20-25 rotation of condile, 40 mm opening anterior rotation and translation
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| what happens with protrusion | bilateral condylar translation
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| what happens with lateral deviation | anterior translation on contralateral side; spin on ipsilateral
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| what nerve innervates mm of mastification | C.N. V Trigeminal
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PT Board Exam
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