Face
what structures are ensheathed in lateral wall of cavernous sinus?
-CN III -CN IV -CN V1 -CN V2
stapedius function
-dampens noise -smallest muscle in body
how does the TMJ dislocate most commone
-heavy yawning -blow to mouth when open
cavernous sinus thrombosis
-infectious agents (commonly s. aureus) easy access through venous system -can lead to septic thrombus -can require 8 weeks of IV antibiotics
trigeminal neuralgia
-intense facial pain -V2>V3>V1 distribution -sudden onset -often incited by triggers -common due to compression of CNV -treated with decompression/opiods
what passes through the body of the cavernous sinus?
-internal carotid artery -sympathetic plexus -CN VI
what muscles open jaw
-lateral pterygoid
mandibular portion of trigeminal innervates
-muslces of mastication -mylohyoid -anterior belly of digastric -tensor tympani -tensor veli palatini
temporomandibular joint dysfunction
-pain and dysfunction of muscles of mastication -20-30% of adults experience
terminal branches of maxillary artery
-sphenopalatine artery -infraorbital artery -posterior supeiror alveolar artery
in addition to muscles of facial expression, what does the facial nerve innervate?
-stylohyoid -post belly of digastric -stapedius
what two veins communicate with the cavernous sinus?
-superior ophthalmic v. -pterygoid plexus v.
what muscles close jaw
-temporalis, masseter, medial pterygoid
Bell Palsy
-temporary paralysis (idiopathic) -may be due to inflammation near stylomastoid foramen -viral infection has been implicated -one of most common cranial nerve disorders
branches of facial nerve
Please Tell Ziggy Bob Marley Called Posterior Auricular Temporal Zygomatic Buccal Mandibular Cervical
ophthalmic nerve sensory zone
forehead, tip of nose, top of head
where does the facial nerve exit?
stylomastoid foramen and forms parotid plexus within parotid gland *does not innervate parotid gland*
transverse facial artery is a branch of the ___ artery
superficial temporal artery
maxillary nerve sensory zone
upper cheek, upper lip
how can infection get into brain?
valveless venous anastomeses in face can carry infection into cavernous sinus & brain
mandibular nerve sensory zone
lower lip, chin, lower cheek, side of head, front of ear
infratemporal fossa
1.5 inch deep -contains, arteries, nerves, veins
cervical plexus sensory zone
anterior neck and post half of ear
where is the sphenomanidbular ligament?
at axis of rotation
what is the problem with parotid gland resection?
can disrupt facial nerve function
purpose of articular tubercle
checks protrusion
purpose of stylomandublar ligament
checks protrusion
what is the axis of rotation of mandible called?
lingula
buccal branch of facial is ____
motor
do the dermatomes of trigeminal overlap?
no
C2 sensory nerve
post neck and post head
how to relocate TMJ
press on mandibular row of teeth -one side at a time
the trigeminal ganglion contains what type of neurons?
pseudounipolar -susceptible to shingles -goes along one dermatomal section of trigeminal
buccal nerve of V3 is ___
sensory
function of branches of facial nerves
somatic motor to muscles of facial expression
denervation of the ____ will cause hyperacusis
stapedius m.
