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19 Cards in this Set
- Front
- Back
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Frontal Belly
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• Origin: Galea aponeurotica
• Insertion: Skin of eyebrows and root of nose • Action: raises the eyebrows, Wrinkles forehead skin horizontally • Nerve Supply: Facial nerve 7 |
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Frontal Belly or frontalis
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• Origin: Galea aponeurotica
• Insertion: Skin of eyebrows and root of nose • Action: raises the eyebrows • Nerve Supply: Facial nerve 7 |
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Occipital belly or occipitalis
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• Origin: Occipital and Temporal bones
• Insertion: galea aponeurotica • Action: Fixes aponeurosis and pulls scalp posteriorly • Nerve supply: facial nerve 7 |
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Epicranius
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has occipito and frontal belly which alternate pulling scalp back and forth
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Corrugator Supercilli: small muscle associated with oribularis oculi
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O: Arch of frontal bone above nasal bone
I: Skin of eyebrown A: Draws eyebrows together and inferiorly NS: Facial nerve |
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Orbicularis Oculi: thin sphincter muscle of eyelid; surrounds rim of orbit
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O: frontal and maxillary bones and ligaments around orbit
I: tissue of eyelid A: closes eye |
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Zygomaticus: muscle pair extening diagnoally from cheekbone to corner of mouth
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O: zygomatic bone
I: skin and muscle at corner of mouth A: raises lateral corners of mouth upward (smiling Muscle) |
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Risorius: slender muscle inferior and lateral to zygomaticus
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O: Lateral fascia associted with masseter muscle
I: skin at angle of mouth A: Draws corner of lip laterally -synergist of zygomaticus |
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Levator labii superioris: thin muscle b/w orbicularis oris and inferior eye margin
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O: zygomatic bone and infraorbital margin of maxilla
I: Skin and muscle of upper lip A: opens lips |
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Depressor labii inferioris: small muscle running from mandible to lower lip
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O: body of mandible lateral to its midline
I: skin and muscle of lower lip A: draws lower lip inferiorly |
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Depressor Anguli oris: small muscle lateral to depressor labii inferioris
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O: body of mandible below incisors
I: skin and muscle at angle of mouth below insertion of zygomaticus A: draws corners of mouth downward and laterally |
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Oribicularis Oris: multilayered muscle of lips
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O: arises indirectly from maxilla and mandible; fibers blended with fibers of other facial muscles ass. with lips
I: encircles mouth, inserts into muscle and skin at angles of mouth A; closes lips |
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Mentalis: one of musclar pair forming V shaped muscle mass on chin
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O: mandible below incisors
I: Skin of chin A: wrinkles chin |
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Buccinator: thin, horizontal cheek muscle; principal muscle of cheek, deep to masseter
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O: molar region of maxilla and mandible
I: orbicularis Oris A: compress cheek |
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Platysma: unpaired, thin, sheetlike neckmuscle
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O: fascia of chest (over pectoral muscles and deltoid)
I: lower margin of mandible, and skin and muscle at corner of mouth A: tenses skin of neck (ex: during shaving) |
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Masseter: powerful muscle that covers lateral aspect of mandibular ramus
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O: zygomatic arch and zygomatic bone
I: angle and ramus of manible A: prime mover of jaw closure NS: 5: trigeminal |
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Temporalis: Fan-shaped muscle that covers part of temporal, frontal, and parietal bones
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O: temporal fossa
I: coronoid process of mandible via a tendon that passes deep to zygomatic arch A: closes jaw NS: trigeminal |
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Medial Pterygoid: deep two headed muscle that runs along internal surface of mandible and is largely concealed by this
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O: medial surface of lateral pterygoid plate of phenoid bone, maxilla, and palatine bone
I: medial surface of mandible near its angle A: acts with lateral pterygoid muscle to protrude mandible and promote side-to-side grinding movments CN 5 |
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Lateral Pterygoid: deep two headed muscle; lies sup to medial pterygoid muscle
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O: greater wing of lateral pterygoid plate of sphenoid bone
I: condyle of mandible and capsule of TMJ A: provides forward sliding and side to side grinding movements of the lower teeth CN 5 |
