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The Head

(CN) The Head

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



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