Facial Muscles Flashcards
Frontalis
Origin: Anterior skull
Insertion: Skin over forehead and eyebrows
Action: Elevates eyebrows
Innervation: Facial N.
Procerus
Origin: Upper part of lateral nasal cartilages
Insertion: Skin over lower forehead
Action: Depresses medial part of eyebrows
Innervation: Facial N.
Orbicularis oculi
Origin: Ring of muscles encircling eyes
Insertion: Ring of muscles encircling eyes
Action: Closes eye
Innervation: Facial N.
Nasalis
Origin: Maxilla above canine
Insertion: Lateral nasal cartilage; part passes across bridge of nose
Action: Flares nostrils
Innervation: Facial N.
Levator labii superioris
Origin: Maxilla over the infraorbital foramen
Insertion: Orbicularis oris
Action: Elevates and everts upper lip
Innervation: Facial N.
Levator anguli oris
Origin: Macilla below infraorbital foramen
Insertion: Corners of orbicularis oris
Action: Elevates and everts upper lip
Innervation: Facial N.
Zygomaticus minor
Origin: Outer part of zygomatic arch
Insertion: Skin and muscle of upper lip
Action: Elevates and everts upper lip
Innervation: Facial N.
Zygomaticus major
Origin: Zygomatic arch
Insertion: Corners of orbicularis oris
Action: Elevates upper lip
Innervation: Facial N.
Orbicularis oris
Origin: Ring of muscles encircling mouth
Insertion: Ring of muscles encircling mouth
Action: Closes mouth
Innervation: Facial N.
Buccinator
Origin: Outer part of posterior maxilla and mandible
Insertion: Orbicularis oris
Action: Compresses cheeks
Innervation: Facial N.
Depressor anguli oris
Origin: Outer surface of mandible
Insertion: Corners of orbicularis oris
Action: Depresses angles of mouth
Innervation: Facial N.
Depressor labii inferioris
Origin: Outer surface of mandible
Insertion: Skin over medial lower lip and orbicularis oris
Action: Depresses lower lip
Innervation: Facial N.
Mentalis
Origin: Mandible below incisors
Insertion: Skin over chin
Action: Elevates skin over chin and protrudes lower lip
Innervation: Facial N.
