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5 Cards in this Set
- Front
- Back
- 3rd side (hint)
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masseter
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O=zygomatic arch
I=angle & ramus of mandible A=prime mover of jaw closure; elevates mandible N=CN V-trigeminal |
elevates...
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temporalis
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O=temporalis fossa
I=coronoid process of mandible via a tendon that passes beneath zygomatic arch A=closes jaw; retraction; lateral & medial excursion N=CN V-trigeminal |
closes...
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buccinator
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O=molar region of maxilla & mandible
I=orbicularis oris at angles of mouth A=draws corner of mouth laterally; compresses cheek (e.g. whistling, blowing, sucking); well developed in nursing infants N=CN VII-fascial |
nursing infants use it
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medial pterygoid
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O=medial surface of sphenoid, maxilla, palatine bone
I=medial surface of mandible near angle A=synergist of temporalis & masseter in elevation of the mandible; acts with lateral pterygoid to promote side-to-side movements N=CN V-trigeminal |
syngergist of temporalis & masseter
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lateral pterygoid
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O=greater wing of lateral pterygoid plate of sphenoid
I=condyle of mandible & capsule of TMJ A=protrudes mandible; grinding movements of lower teeth N=CN V-trigeminal |
protrudes...& action that can cause TMJ
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