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119 Cards in this Set

  • Front
  • Back
The IF is _____ to the zygomatic arch & ___ to the proximal ramus (of mandible).
The temporalis muscle arises from ____. It attaches to ______.
temporal fossa; coalesces & forms tendon deep to zyg. arch); coronoid process
maxilla bone
mastoid & styloid processes (parts of temporal bone)
alveolar process of maxillary
ramus of mandible
lateral pterygoid plate
great. wing of sphenoid & infratemporal crest
The IF communicates with the orbit via ______.
INFERIOR orbital fissure
The IF communicates with the pterygopalatine fossa medially via ______.
pterygomaxillary fissure
The foramen ovale & spinosum are located in what bone?
greater wing of sphenoid
What does the IF contain 1º?
muscles of mastication (which ones?)
____ venous plexus
mastication-temporalis & pterygoid muscles
What does the IF contain 1º?
portion of _____
_____ artery
parotid gland (glenoid process)
Maxillary-main artery of IF
What does the IF contain 1º?
____ nerve
____ ligament
mandibular nerve
sphenomandibular ligament
The mastication muscles attach to ____, ____, & ____.
lat. & med. pterygoid plates
infratemporal crest
pyramidal process of palatine bone
The lateral & medial pterygoid plates are part of the _____ bone.
The infratemporal crest is the _____, lateral edge of the _____ bone.
The ______ is the angle of the mandible
The mylohyoid muscle attaches to ________.
the mylohyoid line (in mandible)
The LINGULA is a bony structure at the level of ____ that leads into _____.
mandibular foramen;
mandibular canal
Why is the mandibular canal significant (especially to dentists)?
Takes inf. alveolar nerve (from mand. n) into mandible to supply inf. jaw--anesthesia bathes inf. alv. branch (lower teeth)
The angle of the mandible in adults is usually ___-___º. Is it different w/age?
older adults & infants have increased angle
The temporalis attaches to the _____.
coronoid process & anterior aspect of mandible
The masseter attaches to _______.
lateral surface of ramus & angle of mandible
The pterygoid muscles are found _____ to the mandible.
The _______ pterygoid has 2 heads.
lateral & medial
The SUPERIOR head of the lat. pterygoid harises from ____ & inserts into _____.
arises: infratemporal crest
attaches: disc b/tw TMJ
The INFERIOR head of the lat. pterygoid arises from ____ & inserts into _____.
arises: lateral pterygoid plate
attaches: fovea of neck of mandible
The medial pterygoid runs about the same angle as what muscle?
masseter (externally)
The medial pterygoid's deep head arises from ____.
pterygoid plate; pyramidal process
The medial pterygoid's superficial head arises from ____.
tubercle of the maxilla
The medial pterygoids heads come together & insert into _____.
angle of the mandible (like the masseter)
Which muscle arises from the medial pterygoid plate?
NONE!!! Both lateral & medial arise from lateral plate (lateral surface & medial surface, respectively)
The temporalis is the 1º ___ & ____ of the jaw, so it ____ the mouth & ___ the jaw.
closes mouth & retracts jaw (brings it back)
The masseter is for ___, ____, & _____ the jaw.
clenching (grasping after elevates)
When the masseter protrudes the jaw, what fibers are used?
superficial fibers that come off the EXTERNAL surface of the zygomatic arch
The medial pterygoid assists in ____ of the jaw (mandible).
The lateral pterygoid is the 1º_____ of the mandible.
The ____ closes the jaw (as in chewing), while the ___ closes it (as in biting).
Depression & elevation of the mandible is carried b/tw __-__º.
____ is the nerve of mastication.
If V3 is injured, what will happen to the jaw?
swing toward injured side (ipsilateral deviation of chin via pterygoid muscles)
If V3 is injured what will likely visably atrophy?
temporal fossa (due to lack of innervation of the masseter)
The ____ is the 1º artery of the IF.
The maxillary a. runs ___ to the neck of mandible & ___ to sphenomandibular ligament.
Lateral to Ligament
The maxillary artery is divided into 3 parts. What are the 1st part's branches?
deep auricular; anterior tympanic; middle meningeal; accessory meningeal; inferior alveolar
The maxillary artery is divided into 3 parts. What are the 2nd part's branches?
masseteric; anterior deep temporal; posterior deep temporal; pterygoid; buccal
The maxillary artery is divided into 3 parts. What are the 3rd part's branches?
post. sup alveolar; infraorbital; desc palatine; art. of p-goid canal; pharyngal br.; sphenopalatine
The ___ part of the maxillary supplies muscles, EXCEPT for what artery?
buccal (b/c buccinator is not a mastication muscle)
The ____ artery pierces the external auditory meatus.
deep auricular-1st part of maxillary artery
The ___ artery travels into the mandible & helps supply the lower jaw.
inferior alveolar-1st part of maxillary artery
The ____ artery travels through the foramen spinosum.
middle meningeal-1st part of maxillary artery
The ____ artery travels up the internal aspect of the tympanic membrane/cavity.
anterior tympanic-1st part of maxillary artery
The ___ artery travels through the foramen ovale & helps supply CNV & related meninges.
accessory meningeal-1st part of maxillary artery
The ___ artery helps supply the hard & soft palate (& adjacent areas).
descending palatine-3rd part of maxillary artery
The ___ artery is a terminal branch of maxillary artery. It leaves via IO foramen.
infraorbital-3rd part of maxillary artery
The ____ artery is the main blood supply of nasal cavity & a terminal branch of max. artery
sphenopalatine-3rd part of maxillary artery
The ____ artery penetrates small foramina on post. maxilla to supply upper jaw/teeth.
posterior superior alveolar-3rd part of maxillary artery
For a ptx. w/chronic epistaxis (nosebleeds), what can be done?
ligate maxillary artery (or even ECA) to prohibit blood flow through sphenopalatine
The ____ venous plexus surrounds the maxillary arterial branches.
The pterygoid venous plexus consists of which 2 main veins?
maxillary & deep facial veins
How does the deep facial vein allow infection to come from external to internal?
communiation (via inferior opthalmic vein) superiorly w/cavernous sinus
The ____ nerve is the main nerve of the infratemporal fossa.
mandibular (V3)
V3 carries what kinds of fibers (G, S, V, A, E..)?
The anterior division of V3 (mandibular) is 1º ____, except for what branch?
except for BUCCAL branch (sensory)
The posterior division of V3 (mandibular) is 1º ____, except for what branch?
except for NERVE 2 MYLOHYOID (innervates m-hyoid & ant. belly of digast)
The trunk of V3 sends the nerve to ____ (tensors) & ____ (meningeal branch)
medial pterygoid;
nervus spinosus
The mandibular nerve descends thru ___ & divides inferior & posterior.
foramen ovale
After V3 goes through foramen ovale, what branches does it divide into?
auriculotemporal n, inferior alveolar n, lingual n.
The ____ nerve ascends to external auditory meatus, ___ to the super. temporal a.
The auriculotemporal nerve has a loop proximally, which lets ____ go through.
middle meningeal artery
The middle meningeal artery travels through which foramen?
The ____ nerve gives off the mental nerve.
inferior alveolar
The _____ branches of V3 are branches to the temporalis.
anterior & posterior deep temporal nerves
The auriculotemporal nerve provides sensory innervation to _______.
anterior-lateral part of face (in front of ear)
The auriculotemporal has some ___ (GSA..)fibers that hitchhiked on it from _____.
GVE fibers from CN9
The GVE fibers that hitchhiked on the auriculotemporal n. will fall off on _____.
parotid gland
The parotid gland gets secretory innervation from ______.
CN 9
The buccal branch of V3 (aka 'long buccal'; NOT buccal of CN7) supplies ____.
skin overlying cheek & mucousa lining adjacent area of oral cavity
The chorda tympani travels through the ____.
middle ear (but doesn't have much to do with the tympanic cavity)
The chorda tympani is a recurrent branch of the ____.
facial nerve
The chorda tympani branches off CN7 just before CN7 exits the _____.
stylomastoid foramen
The chorda tympani leaves the cranium via the _____ fossa & enters the _____.
petrotympanic fissure
Infratemporal fossa
Once in the infratemporal fossa, the chorda tympani becomes associated with ____.
the lingual nerve
Hitchhiking fibers of the chorda tympani are taking & bringing what?
taking: motor fibers into oral cavity
bringhing: sensory fibers back from oral cavity
The motor fibers hitchhiking on chorda tympani are bringing ____ fibers from __.
The pregang. PS fibers from CN7 that hitchhike on chorda tympani synapse on ___ & postgang. have what action?
synapse-submandibular ganglion
action-make submandibular & sublingual salivate
Fibers in the chorda tympani traveling back to CN 7/brain stem are fibers of _____.
taste for the anterior 2/3 of tongue
Sensation for the anterior 2/3 of the tongue is by ___. What is this a branch of?
lingual nerve
branch of CN 5, particularly V3
The otic ganglion are ____ (symp or PS). It's ____ to V3 as V3 enters the IF.
medial to V3
The preganglionic PS fibers from ___ run into the otic ganglion & synapse.
The postganglionic fibers of otic ganglion travel with __ n. to be deposited onto ___.
parotid gland---salivation
CN 7 carries out salivation via _______ (which gland?).
submandibular & sublingual
CN 9 carries out salivation via ________ (which gland?).
What are the 2 synovial joints of the head?
TMJ, b/tw ear ossicles in middle ear
The TMJ is a modified ____ joint b/c it has both ____ & ____.
hinge joint;
hinging & gliding
The gliding of the TMJ helps with ____ of the mandible.
While most synovial joints are lined with fibrocartilage, the TMJ is lined with ______.
hyaline cartilage
The ____ fossa is the cranial accepting cavity for the TMJ.
The _____ is the partial origin for the sphenomandibular ligament.
spine of sphenoid
The _____ & _____ frorm the bony anterior border of the mandibular fossa.
articular tubercle (lateral protrusion) & articular eminence (horizontal portion)
What's ironic about the articular tubarcle?
it doesn't articulate with anything
The _____ is the site of attachment for the lateral ligament of the TMJ.
articular tubercle (helps stabilize lateral surface of articulation)
The stylomandibular ligament is a thickening of _____. Where does it arise & attach?
parotid fascia
arises: styloid process; attaches: gonion (angle)
The TMJ is closely related to the _______. What's the clinical significance?
external auditory meatus
if hit hard, you can fracture ant. wall of external auditory canal
The _____ is the ligament on the medial surface of the TMJ
The sphenomandibular ligament is a remnant of ____.
Meckel's cartilage
The sphenomandibular ligament arises from ____ & inserts onto _____.
arises: spine of sphenoid, next to petrytympanic fissure)
inserts: lingula of mandible
The sphenomandibular ligament is good to pierce when anesthitizing b/c ____.
it helps localize anasthesia around inferior alveolar n. & not spread to other branches of V3
______ pierces the sphenomandibular ligament.
Nerve to mylohyoid
Dislocation of the TMJ is usually _____ to the articular tubercle. How?
Head of condyle will jump over articular eminence
Posterior dislocation of the TMJ is prevented by _____.
tempanic plate (however, you can drive through this boundry & into external ear) & styloid process
Medial dislocation of the TMJ is prevented by _____.
spine of sphenoid
The TMJ disc is made of _____.
dense connective tissue
The 2 joint compartments of the TMJ are ______ & ______.
suprameniscal & inframeniscal compartments
The suprameniscal compartment of the TMJ helps with ____ (45-60%) & _______.
protrusion & retraction
The inframeniscal compartment of the TMJ helps with ____ & _____.
elevation & depression
The ______ is basically the superior head of the lateral pterygoid muscle.
The attachment of the sphenomeniscus is into the ____.
disc of TMJ
What is the purpose of th esphenomeniscus muscle?
it pulls the disc forward to prevent bones of TMJ from rubbing against eachother
An injury to the TMJ of boxers is ______.
force from below driving head of mandible into middle cranial fossa
The TMJ is innervated by what nerve(s)?
great auricular
The blood supply to the TMJ is via which arteries?
superficial temporal, deep auricular, anterior tympanic, ascending pharyngeal