Musculature of the Head OIA's Flashcards
Buccinator OIA
Origin: Alveolar process of mandible and maxilla
Insertion: angle of mouth
Action: compresses cheek against molar
depressor Anguli Oris OIA
Origin: Anteriolateral surface of mandibular body
Insertion: angle of mouth
Action: depresses angle of mouth
Frontalis OIA
Origin: Galea Aponeurotica
Insertion: Skin and muscles of the forehead
Action: raises eyebrows, wrinkles skin of forehead
Occipitalis OIA
Origin: Superior Nuchal Line of occipital bone
Insertion: Galea Aponeurotica
Action: Tenses scalp, moves outer ear
Orbicularis Oris OIA
Origin: Maxilla and Mandible
Insertion: Skin Surrounding mouth
Action: Closes and purses lips
Orbicularis Occuli OIA
Origin: Medial margin of bony orbit
Insertion: eyelids
Action: Closes eyelids
Zygomaticus major OIA
Origin: Zygomatic Bone
Insertion: Angle of mouth
Action: Raises angle of mouth
Temporalis OIA
Origin: Temporal fossa
Insertion: coronoid process of mandible
Action: closes jaw/ elevates mandible
Masseter OIA
Origin: Zygomatic arch
Insertion: mandibular angle and ramus
Action: elevates and retracts mandible
Platysma OIA
Origin: Skin of lower neck and upper thorax
Insertion: lower mandible and skin of the lower face
Action: tenses skin of neck, depresses mandible
Risorius OIA
Origin: Fascia Associated with masseter
Insertion: angle of mouth
Action: draws angle of mouth to side
Superior rectus
Action: Elevates eye
Inferior rectus
Action: depresses eye
Lateral rectus
Action: moves eye laterally
Medial rectus
Action: moves eye laterally
