COSD 202
Mastication
Chewing
Temporalis
Origin: Temporal Bone
Insertion: Coronoid process of mandible
Innervation: CN V3
Major Action: Elevates the
mandible
Masseter
Origin: Zygomatic Arch
Insertion: Angle of the Mandible
Innervation: CN V3
Major Action: Elevates the
mandible
Occipitofrontalis
Innervated: CN VII facial
Action: Raises eyebrows and wrinkles forehead
Orbicularis Oculi
Origin: Nasal part of frontal bone, lacrimal bone, and the medial palpebral ligament
Insertion: lateral palpebral raphe
Innervation: CN VII Facial
Major Action: Closes eyelid
Orbicularis Oris
Origin: Near the midline of the maxilla (orbicularis oris superior) and the mandible (orbicularis oris inferior)
Insertion: Angles of the mouth
Innervation: CN VII Facial
Major Action: purses, protrudes, and closes the lips