Exam II lecture VI Flashcards
Platysma origin/insertion
O- SubQ of infraclavicular/supraclavicular regions
I- Base of mandible, cheek skin, lower lip, mouth angle
Platysma action
Depresses mandible, tenses skin of inferior face/neck
Occipitofrontalis origin/inserition
O- anterior epicranial aponeurosis
I- posterior superior nuchal line
Occipitofrontalis action
Elevates eyebrows, protracts scalp
Orbicularis oculi action
Closes eyelids
Procerus origin/insertion
O- facial aponeurosis, lateral nasal cartilage
I-skin between eyebrows
Procerus action
Depresses medial sides of eyebrows and wrinkles skin over dorsum of nose
Nasalis origin/insertion
O- frontal processes of maxillae
I- alar cartilage
Nasalis action
Depresses alae laterally and dilates anterior nasal aperture
Orbicularis oris origin/insertion
O-medial maxilla/mandible, deep skin around mouth
I- Mucosa of lips
Orbicularis oris action
Closes oral fissure, compresses/protrudes lips
Levator labii superioris origin/insertion
O- infraorbital margin
I- Skin of upper lip
Levator labii superioris action
Part of dilators of mouth
Zygomaticus minor origin/insertion
O- anterior part of zygomatic bone
I- skin of upper lip
Zygomaticus minor action
Part of dilators of mouth
Zygomaticus major origin/insertion
O- Lateral part of zygomatic bone
I- Angle of mouth
Zygomaticus major action
Elevates labial commissures (corner of mouth)
Risorius origin/insertion
O- Parotid fascia and buccal skin
I- Angle of mouth
Risorius action
Depresses labial commissures
Depressor anguli oris origin/insertion
O-Anterolateral base of mandible
I- Angle of mouth
Depressor anguli oris action
Depresses labial commissures
Depressor labii inferioris origin/insertion
O- Platysma and mandible
I- Skin of lower lip
Depressor labii inferioris action
Mouth dilator, depresses and everts lower lip
Facial artery is a branch of
External carotid artery
Branches of the facial artery include
Superior/inferior labial arteries
Lateral nasal artery
Angular artery
Superficial temporal artery is terminal branch from
External carotid
Superficial temporal artery route
Emerges between TMJ and auricle
Enters temporal fossa
Divides into frontal and parietal branches
Transverse facial artery arises from
Superficial temporal artery
Transverse facial artery anastomosis with
Facial artery
Transverse facial artery branches supply
Parotid gland
Masseter muscle
Skin of face
Sensory innervation to face is via
Trigeminal nerve
Branches of trigeminal nerve
Opthalamic
Maxillary
Mandibular
Opthalamic branch of trigeminal passes through
Superior orbital fissure
Maxillary branch of trigeminal passes through
Foramen rotundum
Mandibular branch of trigeminal passes through
Foramen ovale
What nerve is primary motor nerve to facial expression muscles
Cranial nerve VII
What does cranial nerve VII pass through
Stylomastoid foramen
