Muscles of the Face Flashcards
Frontalis origin
Skin of eyebrows
Frontalis insertion
Galea aponeurotica
Frontalis innervation
Facial n. (CN VII)- temporal branch
Frontalis blood supply
Supraorbital a.
Frontalis actions
- wrinkles forehead
- raises eyebrows
Orbicularis oculi origin
- frontal bone
- maxilla
- lacrimal bone
- medial palpebral ligament
Orbicularis oculi insertion
- lateral palpebral raphe
- superior and inferior tarsi medial
Orbicularis oculi innervation
Facial n. (CN VII)
Orbicularis oculi blood supply
Ophthalmic a.
Orbicularis oculi action
Closes eyelids gently and forcefully
Nasalis origin
Maxilla
Nasalis insertion
- thin aponeurosis on bridge of nose
- nasalis on opposite side
- greater alar cartilage
Nasalis innervation
Facial n. (CN VII)
Nasalis blood supply
Superior labial a.
Nasalis actions
- compress nasal aperture
- draw cartilage downward and laterally opening nostrils
Levator labii superioris alaeque nasi origin
Frontal process of maxilla
Levator labii superioris alaeque nasi insertion
- alar cartilage of nose
- upper lip
Levator labii superioris alaeque nasi innervation
Facial n. (CN VII)- buccal branch
Levator labii superioris alaeque nasi blood supply
Facial a.
Levator labii superioris alaeque nasi action
- Raises upper lip
- opens nostril
Zygomaticus major origin
Posterior part of lateral surface of zygomatic bone
Zygomaticus major insertion
Skin at corner of mouth
Zygomaticus major innervation
Facial n. (CN VII)- zygomatic branch
Zygomaticus major blood supply
Facial a.
Zygomaticus major action
Draw angle of mouth laterally and upward
Zygomaticus minor origin
Anterior part of lateral surface of zygomatic bone
Zygomaticus minor insertion
Upper lip just medial to corner of mouth
Zygomaticus minor innervation
Facial n. (CN VII)- zygomatic branch
Zygomaticus minor blood supply
Facial a.
Zygomaticus minor actions
Draws upper lip upward
Levator labii superioris origin
Infraorbital margin of maxilla
Levator labii superioris insertion
Skin of upper lateral half of upper lip
Levator labii superioris innervation
Facial n. (CN VII)- buccal branch
Levator labii superioris blood supply
Facial a.
Levator labii superioris action
- Raises upper lip
- helps form nasolabial furrow
Depressor labii inferioris origin
Anterior part of oblique line of mandible
Depressor labii inferioris insertion
Lower lip at midline
Depressor labii inferioris innervation
Facial n. (CN VII)- marginal mandibular branch
Depressor labii inferioris blood supply
Facial a.
Depressor labii inferioris action
Draws lower lip downward and laterally
Orbicularis oris origin
- Fibers from surrounding facial mm.
- maxilla and mandible at midline
Orbicularis oris insertion
Forms ellipse around mouth
Orbicularis oris innervation
Facial n. (CN VII)- buccal branch
Orbicularis oris blood supply
Superior and inferior labial aa.
Orbicularis oris actions
Closes and protrudes lips
Levator anguli oris origin
Maxilla below infraorbital foramen
Levator anguli oris insertion
Skin at corner of the mouth
Levator anguli oris innervation
Facial n. (CN VII)- buccal branch
Levator anguli oris blood supply
Facial a.
Levator anguli oris action
- Raises angle of mouth
- helps form nasolabial furrow
Depressor anguli oris origin
Oblique line of mandible below canine, pre molar, and 1st molar
Depressor anguli oris insertion
Skin at corner of mouth
Depressor anguli oris innervation
Facial n. (CN VII)- mandibular branch
Depressor anguli oris blood supply
Facial a.
Depressor anguli oris action
Draws angle of mouth downward and laterally
Mentalis origin
Mandible inferior to incisors
Mentalis insertion
Skin of chin
Mentalis innervation
Facial n. (CN VII)- mandibular branch
Mentalis blood supply
Facial a.
Mentalis action
- raises and protrudes lower lip
- wrinkles skin on chin
Buccinator origin
- Posterior parts of maxilla and mandible
- pterygomandibular raphe
Buccinator insertion
Orbicularis oris
Buccinator innervation
Facial n. (CN VII)- buccal branch
Buccinator blood supply
Facial a.
Buccinator action
- Presses cheeks against teeth
- compresses distended cheeks
Masseter origin
- Zygomatic arch
- maxillary process of zygomatic bone
Masseter insertion
Lateral surface of ramus of mandible
Masseter innervation
Masseteric n. from V3
Masseter blood supply
Masseteric a.
Masseter action
Elevates mandible