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119 Cards in this Set
- Front
- Back
The IF is _____ to the zygomatic arch & ___ to the proximal ramus (of mandible).
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medial
medial |
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The temporalis muscle arises from ____. It attaches to ______.
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temporal fossa; coalesces & forms tendon deep to zyg. arch); coronoid process
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BORDERS of IF:
Anterior: Posterior: Inferior: |
maxilla bone
mastoid & styloid processes (parts of temporal bone) alveolar process of maxillary |
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BORDERS of IF:
Lateral: Medial: Superior: |
ramus of mandible
lateral pterygoid plate great. wing of sphenoid & infratemporal crest |
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The IF communicates with the orbit via ______.
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INFERIOR orbital fissure
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The IF communicates with the pterygopalatine fossa medially via ______.
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pterygomaxillary fissure
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The foramen ovale & spinosum are located in what bone?
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greater wing of sphenoid
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What does the IF contain 1º?
muscles of mastication (which ones?) ____ venous plexus |
mastication-temporalis & pterygoid muscles
pterygoid |
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What does the IF contain 1º?
portion of _____ _____ artery |
parotid gland (glenoid process)
Maxillary-main artery of IF |
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What does the IF contain 1º?
____ nerve ____ ligament |
mandibular nerve
sphenomandibular ligament |
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The mastication muscles attach to ____, ____, & ____.
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lat. & med. pterygoid plates
infratemporal crest pyramidal process of palatine bone |
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The lateral & medial pterygoid plates are part of the _____ bone.
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sphenoid
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The infratemporal crest is the _____, lateral edge of the _____ bone.
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inferior;
sphenoid |
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The ______ is the angle of the mandible
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gonion
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The mylohyoid muscle attaches to ________.
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the mylohyoid line (in mandible)
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The LINGULA is a bony structure at the level of ____ that leads into _____.
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mandibular foramen;
mandibular canal |
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Why is the mandibular canal significant (especially to dentists)?
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Takes inf. alveolar nerve (from mand. n) into mandible to supply inf. jaw--anesthesia bathes inf. alv. branch (lower teeth)
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The angle of the mandible in adults is usually ___-___º. Is it different w/age?
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115-120º
older adults & infants have increased angle |
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The temporalis attaches to the _____.
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coronoid process & anterior aspect of mandible
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The masseter attaches to _______.
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lateral surface of ramus & angle of mandible
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The pterygoid muscles are found _____ to the mandible.
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deep
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The _______ pterygoid has 2 heads.
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lateral & medial
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The SUPERIOR head of the lat. pterygoid harises from ____ & inserts into _____.
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arises: infratemporal crest
attaches: disc b/tw TMJ |
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The INFERIOR head of the lat. pterygoid arises from ____ & inserts into _____.
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arises: lateral pterygoid plate
attaches: fovea of neck of mandible |
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The medial pterygoid runs about the same angle as what muscle?
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masseter (externally)
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The medial pterygoid's deep head arises from ____.
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pterygoid plate; pyramidal process
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The medial pterygoid's superficial head arises from ____.
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tubercle of the maxilla
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The medial pterygoids heads come together & insert into _____.
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angle of the mandible (like the masseter)
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Which muscle arises from the medial pterygoid plate?
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NONE!!! Both lateral & medial arise from lateral plate (lateral surface & medial surface, respectively)
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The temporalis is the 1º ___ & ____ of the jaw, so it ____ the mouth & ___ the jaw.
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ELEVATOR & RETRACTOR;
closes mouth & retracts jaw (brings it back) |
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The masseter is for ___, ____, & _____ the jaw.
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elevating
clenching (grasping after elevates) protruding |
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When the masseter protrudes the jaw, what fibers are used?
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superficial fibers that come off the EXTERNAL surface of the zygomatic arch
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The medial pterygoid assists in ____ of the jaw (mandible).
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elevation
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The lateral pterygoid is the 1º_____ of the mandible.
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protruder
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The ____ closes the jaw (as in chewing), while the ___ closes it (as in biting).
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temporalis-chewing
masseter-biting |
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Depression & elevation of the mandible is carried b/tw __-__º.
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40-60º
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____ is the nerve of mastication.
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V3
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If V3 is injured, what will happen to the jaw?
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swing toward injured side (ipsilateral deviation of chin via pterygoid muscles)
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If V3 is injured what will likely visably atrophy?
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temporal fossa (due to lack of innervation of the masseter)
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The ____ is the 1º artery of the IF.
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maxillary;
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The maxillary a. runs ___ to the neck of mandible & ___ to sphenomandibular ligament.
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DEEP;
Lateral to Ligament |
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The maxillary artery is divided into 3 parts. What are the 1st part's branches?
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deep auricular; anterior tympanic; middle meningeal; accessory meningeal; inferior alveolar
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The maxillary artery is divided into 3 parts. What are the 2nd part's branches?
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masseteric; anterior deep temporal; posterior deep temporal; pterygoid; buccal
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The maxillary artery is divided into 3 parts. What are the 3rd part's branches?
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post. sup alveolar; infraorbital; desc palatine; art. of p-goid canal; pharyngal br.; sphenopalatine
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The ___ part of the maxillary supplies muscles, EXCEPT for what artery?
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buccal (b/c buccinator is not a mastication muscle)
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The ____ artery pierces the external auditory meatus.
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deep auricular-1st part of maxillary artery
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The ___ artery travels into the mandible & helps supply the lower jaw.
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inferior alveolar-1st part of maxillary artery
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The ____ artery travels through the foramen spinosum.
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middle meningeal-1st part of maxillary artery
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The ____ artery travels up the internal aspect of the tympanic membrane/cavity.
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anterior tympanic-1st part of maxillary artery
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The ___ artery travels through the foramen ovale & helps supply CNV & related meninges.
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accessory meningeal-1st part of maxillary artery
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The ___ artery helps supply the hard & soft palate (& adjacent areas).
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descending palatine-3rd part of maxillary artery
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The ___ artery is a terminal branch of maxillary artery. It leaves via IO foramen.
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infraorbital-3rd part of maxillary artery
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The ____ artery is the main blood supply of nasal cavity & a terminal branch of max. artery
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sphenopalatine-3rd part of maxillary artery
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The ____ artery penetrates small foramina on post. maxilla to supply upper jaw/teeth.
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posterior superior alveolar-3rd part of maxillary artery
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For a ptx. w/chronic epistaxis (nosebleeds), what can be done?
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ligate maxillary artery (or even ECA) to prohibit blood flow through sphenopalatine
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The ____ venous plexus surrounds the maxillary arterial branches.
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pterygoid
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The pterygoid venous plexus consists of which 2 main veins?
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maxillary & deep facial veins
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How does the deep facial vein allow infection to come from external to internal?
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communiation (via inferior opthalmic vein) superiorly w/cavernous sinus
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The ____ nerve is the main nerve of the infratemporal fossa.
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mandibular (V3)
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V3 carries what kinds of fibers (G, S, V, A, E..)?
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GSA & SVE
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The anterior division of V3 (mandibular) is 1º ____, except for what branch?
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MOTOR,
except for BUCCAL branch (sensory) |
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The posterior division of V3 (mandibular) is 1º ____, except for what branch?
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SENSORY,
except for NERVE 2 MYLOHYOID (innervates m-hyoid & ant. belly of digast) |
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The trunk of V3 sends the nerve to ____ (tensors) & ____ (meningeal branch)
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medial pterygoid;
nervus spinosus |
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The mandibular nerve descends thru ___ & divides inferior & posterior.
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foramen ovale
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After V3 goes through foramen ovale, what branches does it divide into?
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auriculotemporal n, inferior alveolar n, lingual n.
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The ____ nerve ascends to external auditory meatus, ___ to the super. temporal a.
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auriculotemporal
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The auriculotemporal nerve has a loop proximally, which lets ____ go through.
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middle meningeal artery
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The middle meningeal artery travels through which foramen?
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spinosum
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The ____ nerve gives off the mental nerve.
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inferior alveolar
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The _____ branches of V3 are branches to the temporalis.
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anterior & posterior deep temporal nerves
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The auriculotemporal nerve provides sensory innervation to _______.
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anterior-lateral part of face (in front of ear)
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The auriculotemporal has some ___ (GSA..)fibers that hitchhiked on it from _____.
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GVE fibers from CN9
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The GVE fibers that hitchhiked on the auriculotemporal n. will fall off on _____.
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parotid gland
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The parotid gland gets secretory innervation from ______.
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CN 9
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The buccal branch of V3 (aka 'long buccal'; NOT buccal of CN7) supplies ____.
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skin overlying cheek & mucousa lining adjacent area of oral cavity
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The chorda tympani travels through the ____.
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middle ear (but doesn't have much to do with the tympanic cavity)
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The chorda tympani is a recurrent branch of the ____.
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facial nerve
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The chorda tympani branches off CN7 just before CN7 exits the _____.
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stylomastoid foramen
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The chorda tympani leaves the cranium via the _____ fossa & enters the _____.
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petrotympanic fissure
Infratemporal fossa |
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Once in the infratemporal fossa, the chorda tympani becomes associated with ____.
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the lingual nerve
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Hitchhiking fibers of the chorda tympani are taking & bringing what?
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taking: motor fibers into oral cavity
bringhing: sensory fibers back from oral cavity |
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The motor fibers hitchhiking on chorda tympani are bringing ____ fibers from __.
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PREGANGLIONIC PARASYMPATHETIC from CN 7.
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The pregang. PS fibers from CN7 that hitchhike on chorda tympani synapse on ___ & postgang. have what action?
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synapse-submandibular ganglion
action-make submandibular & sublingual salivate |
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Fibers in the chorda tympani traveling back to CN 7/brain stem are fibers of _____.
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taste for the anterior 2/3 of tongue
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Sensation for the anterior 2/3 of the tongue is by ___. What is this a branch of?
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lingual nerve
branch of CN 5, particularly V3 |
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The otic ganglion are ____ (symp or PS). It's ____ to V3 as V3 enters the IF.
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PARASYMPATHETIC;
medial to V3 |
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The preganglionic PS fibers from ___ run into the otic ganglion & synapse.
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CN IX
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The postganglionic fibers of otic ganglion travel with __ n. to be deposited onto ___.
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auriculotemporal;
parotid gland---salivation |
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CN 7 carries out salivation via _______ (which gland?).
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submandibular & sublingual
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CN 9 carries out salivation via ________ (which gland?).
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parotid
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What are the 2 synovial joints of the head?
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TMJ, b/tw ear ossicles in middle ear
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The TMJ is a modified ____ joint b/c it has both ____ & ____.
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hinge joint;
hinging & gliding |
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The gliding of the TMJ helps with ____ of the mandible.
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protrusion
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While most synovial joints are lined with fibrocartilage, the TMJ is lined with ______.
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hyaline cartilage
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The ____ fossa is the cranial accepting cavity for the TMJ.
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mandibular
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The _____ is the partial origin for the sphenomandibular ligament.
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spine of sphenoid
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The _____ & _____ frorm the bony anterior border of the mandibular fossa.
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articular tubercle (lateral protrusion) & articular eminence (horizontal portion)
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What's ironic about the articular tubarcle?
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it doesn't articulate with anything
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The _____ is the site of attachment for the lateral ligament of the TMJ.
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articular tubercle (helps stabilize lateral surface of articulation)
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The stylomandibular ligament is a thickening of _____. Where does it arise & attach?
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parotid fascia
arises: styloid process; attaches: gonion (angle) |
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The TMJ is closely related to the _______. What's the clinical significance?
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external auditory meatus
if hit hard, you can fracture ant. wall of external auditory canal |
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The _____ is the ligament on the medial surface of the TMJ
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sphenomandibular
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The sphenomandibular ligament is a remnant of ____.
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Meckel's cartilage
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The sphenomandibular ligament arises from ____ & inserts onto _____.
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arises: spine of sphenoid, next to petrytympanic fissure)
inserts: lingula of mandible |
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The sphenomandibular ligament is good to pierce when anesthitizing b/c ____.
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it helps localize anasthesia around inferior alveolar n. & not spread to other branches of V3
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______ pierces the sphenomandibular ligament.
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Nerve to mylohyoid
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Dislocation of the TMJ is usually _____ to the articular tubercle. How?
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Head of condyle will jump over articular eminence
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Posterior dislocation of the TMJ is prevented by _____.
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tempanic plate (however, you can drive through this boundry & into external ear) & styloid process
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Medial dislocation of the TMJ is prevented by _____.
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spine of sphenoid
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The TMJ disc is made of _____.
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dense connective tissue
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The 2 joint compartments of the TMJ are ______ & ______.
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suprameniscal & inframeniscal compartments
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The suprameniscal compartment of the TMJ helps with ____ (45-60%) & _______.
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protrusion & retraction
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The inframeniscal compartment of the TMJ helps with ____ & _____.
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elevation & depression
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The ______ is basically the superior head of the lateral pterygoid muscle.
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sphenomeniscus
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The attachment of the sphenomeniscus is into the ____.
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disc of TMJ
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What is the purpose of th esphenomeniscus muscle?
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it pulls the disc forward to prevent bones of TMJ from rubbing against eachother
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An injury to the TMJ of boxers is ______.
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force from below driving head of mandible into middle cranial fossa
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The TMJ is innervated by what nerve(s)?
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masseteric
auriculotemporal great auricular |
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The blood supply to the TMJ is via which arteries?
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superficial temporal, deep auricular, anterior tympanic, ascending pharyngeal
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