head & face AOIN Flashcards
Masseter
A: elevate mandible, may assist to protract mandible
O: zygomatic arch
I: angle and ramus of mandible
N: trigminal (V) nerve
Temporalis
A: elevate mandible, retract mandible
O: temporal fossa and fascia
I: coronoid process and anterior edge of ramus of mandible
N: trigeminal (V) nerve
Medial Pterygoid
A: unilaterally - laterally deviate mandible to opposite side
: bilaterally - elevate and protract mandible
O: medial surface of lateral pterygoid plate of sphenoid bone and tuberosity of maxilla
I: medial surface of ramus of mandible
N: trigeminal (V)
Lateral Pterygoid
A: unilaterally - laterally deviate mandible to opposite side
: bilaterally - protract mandible
O: superior head - infratemporal surface and crest of greater wing of sphenoid bone
: inferior head - lateral surface of lateral pterygoid plate of sphenoid bone
I: articular disc and capsule of TMJ, neck of mandible
N: trigeminal (V)
Suprahyoids - geniohyoid, Mylohyoid, Stylohyoid
A: elevate hyoid and tongue, depress mandibleO: Genio and Mylo - underside of mandible
: Stylo - styloid process
I: hyoid bone
N: Genio - C1,2
: Mylo - trigeminal (V)
: Stylo - facial (VII)
Digastric
A: with hyoid fixed - depress mandible
: with mandible fixed - elevate hyoid bone
: retract mandible
O: mastoid process
I: inferior border of mandible
N: anterior belly - trigeminal (V)
: posterior belly - facial (VII)
Infrahyoids - Sternohyoid, Sternothyroid, Thyrohyoid, Omohyoid
A: depress hyoid bone and thyroid cartilageO: Sterno x2 - top of manubrium
: Thyro - thyroid cartilage
: Omo - superior border of scapula
I: Hyoids x3 - hyoid boneThyroid - thyroid cartilageN: Sterno x2, Omo - C1,2,3
: Thyro - C1,2
Occipitofrontalis
A: Frontalis - raise eyebrows and wrinkle forhead
: Occipitalis - anchor and retract galea posteriorly
O: galea aponeurotica
I: F - skin superior to eyebrows
: O - superior nucal line of occiput
N: facial (VII)
