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15 Cards in this Set
- Front
- Back
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Corrugator Supercilii |
Origin: arch of frontal bone above nasal bone Insertion: skin of eyebrow Action: pulls eyebrows medially and inferiorly |
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Orbicularis Oculi |
Origin: frontal and maxillary bones and ligaments around orbit Insertion: tissue of eyelid Action: closes eye |
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Levator Labii Superioris |
Origin: zygomatic bone and infraorbital margin of maxilla Insertion: skin and muscle of upper lip Action: opens lip |
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Zygomaticus minor & major |
Origin: Zygomatic bone Insertion: skin and muscle at corner of mouth Action: raises lateral corners of mouth |
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Buccinator |
Origin: molar region of maxilla and mandible Insertion: orbicularis oris Action: compresses cheek |
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Risorius |
Origin: Lateral fascia associated with masseter muscle
Insertion: skin at angle of mouth Action: Pulls corner of lip laterally |
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Orbicularis Oris |
Origin: arises indirectly from maxilla and mandible; fibers blend with fibers of other facial muscles associated with the lips Insertion: encircles mouth inserts into muscle and skin at angles of mouth
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Mentalis |
Origin: Mandible below incisors Insertion: Skin of chin Action: Wrinkles chin |
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Depressor Labii Inferioris |
Origin: Body of mandible lateral to its midline Insertion: skin and muscle of lower lip Action: pulls lower lip inferiorly |
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Depressor Anguli Oris |
Origin: body of mandible below incisors Insertion: skin and muscle at angle of mouth below insertion of zygomaticus Action: pulls corners of mouth down and laterally |
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Platysma |
Origin: fascia of chest (over pectoral muscles and deltoid) Insertion: lower margin of mandible and skin and muscle at corner of mouth Action: tenses skin of neck |
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Temporalis |
Origin: Temporal fossa insertion: coronoid process of mandible via tendon that passes deep to zygomatic arch Action: closes jaw |
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Masseter |
Origin: zygomatic arch and zygomatic bone Insertion: angle and ramus of mandible Action: prime mover of jaw closure |
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Lateral Pterygoid |
Origin: greater wing and lateral pterygoid plate of sphenoid bone Insertion: condylar process of mandible and capsule of temporomandibular joint Action: provides side to side grinding movements |
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Medial Pterygoid |
Origin: medial surface of lateral pterygoid plate of sphenoid bone, maxilla and palatine bone Insertion: medial surface of mandible near its angle Action: acts with the lateral pterygoid muscle to protract (pulls anteriorly) the mandible and promote side to side grinding movement |
