Superficial Face Flashcards
The muscles of facial expression have a ______ origin but a ______ insertion.
bony; fascial
What innervates the muscles of facial expression?
branches of CN VII
What allows muscles of facial expression to act together in groups?
The fact that their fibers interlace (they act together to alter size/shape of orifices of the face).
What is the difference b/t function of the outer portion of the orbicularis oculi and the palbebral portion of the orbicularis oculi?
- Outer: allows for squeezing eyes shut
- Palpebral: moves the eyelids (usually only upper eyelid moves)
Function of platysma?
tenses skin of neck
Function of frontalis muscle?
wrinkles forehead skin and raises eyebrows
Innervation of frontalis?
temporal branches of CN VII
Innervation of orbicularis oris?
zygomatic, buccal, and mandibular branches of facial nerve
Function of buccinator?
compresses cheeks, expels air b/t lips, aids in mastication
Innervation of buccinator?
buccal branches of facial nerve
Function of zygomaticus major?
zygomatic and buccal branches of facial nerve
Innervation of zygomaticus major?
draws angle of mouth backward and upward (smiling muscle)
Innervation of platysma?
CN VII
Function of orbicularis oris?
compression, contraction, and protrusion of lips
Is buccinator a superficial or deep muscle of facial expression?
deep
What are the main superficial muscles of facial expression that we discussed?
- Frontalis
- Orbicularis oculi
- Orbicularis oris
- Zygomaticus major
- Platysma
Where does the facial nerve exit the cranium?
stylomastoid foramen
Which nerve controls the motor innervation of facial expression, and which controls sensory innervation of the face?
- Motor: CN VII (facial)
- Sensory: CN V (trigeminal - 3 branches)
What structure does the facial nerve pierce?
parotid gland
Which structures pierce the parotid gland?
- Facial nerve
- External carotid artery
- Retromandibular vein
What is the parotid gland innervated by?
Parasympathetic fibers from the glossopharyngeal nerve (IX), which synapse in otic ganglion and travel into auriculotemporal nerve as it passes through parotid gland.
The parotid salivary gland secretes serous fluids via_______, which pierces______.
Stenson’s duct; buccinator
Transverse facial artery runs close to what?
parotid duct and zygomatic branch of facial nerve
Is the facial vein superficial or deep to the submandibular gland?
superficial
Bacteria in the “danger triangle” can migrate to the cranium via which structure/vessel?
deep facial vein
Is the facial artery superficial or deep to the submandibular gland?
deep
