Lecture 25: Face, Parotid Region, and Guttural Pouch Flashcards
what cranial nerve innervates the muscles of facial expression
CN VII-facial
what are the muscles of facial expression
platysma
sphincter colli superficialis
orbivularis oris
levator nasolabialis
orbicularis oculi
levator labii superiosis
caninus
buccinator
parotidoauricularis
what does the orbicularis oris do
purses lips, closes the mouth
what does the levator nasolabialis do
dilate nostrils, elevate and retract rostral portion of upper lip
what does orbicularis oculi do
closes the eyes
what does the levator labii superisos do
elevates middle of upper lip
what does caninus do
dilates nostrils, elevates corner of mouth, snarls
what does buccinator do
works with tongue to keep food on teeth
parotidoauricularis
often damaged during surgeries draining the external ear
where does the parotid gland drain
single long parotid duct that crosses masseter superficially
where does the portion of the facial nerve that innervates muscles of facial expression emerge from
stylomastoid foramen
what branch of the facial nerve crosses the zygomatic arch to reach rostral muscles of the eye and muscles that close the eyelid
auriculoplapebral nerve
what nerve is often blocked for ophthalmic exams
auriculopalpebral nerve
what branch of the facial nerve innervates the cheeks, lips, and nostrils
dorsal and ventral buccal branches
where do both buccal nerve branches cross
masseter
what vessels supply blood to the face
external carotid artery and its two branches–> superficial temporal artery and maxillary artery
what branch of the external carotid artery passes distal to the lingual then courses deep to mandible and primarily supplies blood to cheeks and lips
facial artery
what two arteries branch off maxillary
infraorbital and mental
what artery branches off superficial temporal
transverse facial
what artery crosses superficial surface of masseter just ventral to zygomatic arch
transverse facial artery
what veins serve as potential infection pathways to surface of cranial cavity
deep facial, buccal and ophthalmic veins
what veins help regulate blood temperature in the brain, help with blood flow away from head in grazers
deep facial, buccal, and ophthalmic
what vein is formed by union of facial and lingual veins just caudal to the mandible
linguofacial vein
what vein is the primary draining for many deeper head and neck regions
maxillary vein
