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31 Cards in this Set

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what are the boundaries of the parotid region?
posterior: mastoid process
anterior: ramus of mandible
posterpsuperior: floor of external auditory meatus
superior: zygomatic arch
medial: styloid process
what are the boundaries of the temporal fossa?
general location is above the zygomatic arch. The floor is portions of the frontal, sphenoid, parietal, and temporal bones. Anterior is the zygomatic process of the frontal bone and the frontal process of the zygoma. The superior and temporal boundaries is the superior temporal line.
what are the boundaries of the infratemporal fossa?
lateral wall is the ramus and coronoid process of the mandible. Anterior border is posterior surface of maxilla. The medial is the lateral pterygoid plate. The roof is the infratemporal surface of the greater wing of the sphenoid.
what travels through the foramina ovale?
the mandibular nerve, the lesser petrosal nerve (may go through its own foramen), accessory meningeal artery.
what travels through the foramin spinosum?
middle meningeal artery, meningeal branch of mandibular nerve.
the retromandibular vein gives rise to what two tributaries?
the superficial temporal vain and the maxillary vein
the anterior branch of the retromandibular vein joins what other vein to form what new vein? Where does this vein drain?
facial vain, common facial vein, and internal jugular
the posterior branch of the retromandibular vein join with what other vein to form what new vein? Where does this vein drain?
posterior auricular vein, external jugular, subclavian vein
the facial veins are continusous with what? What is the significane of this continuity?
pterygoid plexus of veins which is continuous with the dural venous sinuses. There are no valves here so backflow can occur. Bacterial backflow can cause meningitis
what are the strongest muscles involved in closing the jaw?
masseter, temporalis, and medial pterygoid
what muscle are involved in opening the jaw?
lateral pterygoid, mylohyoid, geniohyoid, digastric, and infrahyoid.
which action is stronger, opening or closing the jaw?
closing
due to the parotid filling the area in the posterior ramus of the mandible, the mandible must move forward before it can completely open. What muscle assists with this?
the upper part of the lateral pterygoid (note the lower head assists with the hinge movement)
what fibrous structures attach the jaw to the skull?
(at tempromandibular joint)
capsule, lateral temporomandibular ligament, stylomandibular lig, and sphenomandibular lig
what movements occur between the head of the mandible and the articular disc? articular disease and mandibular fossa? (check this in moores)
sliding, hinge
what is the relation between the articular tubercle and a jaw dislocation?
the head of the mandible becomes lodged anterior to the articular tubercle
the internal carotid terminates as what arteries?
the superficial temporal and the maxillary
the mandibular part of the maxillary artery gives rise to what impportant arteries?
middle meningeal and inferior alveolar (which gives rise to the mylohyoid and the mental artery)
the pterygoid part of the maxillary artery gives rise to what important arteries?
the deep temporal, masseteric, and pterygoid arteries are muscular arteries. It also gives rise to the buccal artery
The pterygopalatine part of the maxillary artery gives rise to what important arteries>?
the posterior superior alveolar, infraorbital, descending palatine, and sphenopalatine
what is the only branch of the trigem that has both motor fibers? what are its branches? (note it also has sensory fibers as well)
the mandibular nerve. Branches: buccal to the cheek, lingual to anterior 2/3 of tongue, inferior alveolar to teeth and chin, and auriculotemporal to the front of the ear and temporal region.
what muscles do the motor component of the mandibular innervate?
temporalis, masseter, lateral and medial pterygoids, mylohyoid, anterior belly of digastric, tensor veli palatini, and tensor tympani
what nerve components are contained in the lingual nerve? What other fibers does it carry?
GSA, but it also carries preganglionic parasympathetic fibers to the submandibular foramen and carries SVA from anterior 2/3 of tongue to the chorda tympani to the facial
the auriculotemporal nerve carries what fibers from the otic ganglion to the parotid gland?
postganglionic parasympathetics
inferior alveolar nerve terminates as what nerve? Before it terminates, it gives off what nerve?
mental nerve, nerve to mylohyoid
the chorda tympani arises from what nerve carrying what fibers? What nerve does it join fibers with? What ganglion does it bring some of its fibers to?
the facial nerve carrying taste and GVE preganglionic parasympathetics. the lingual nerve (branch of mandibular part of trigem). Brings GVE's to submandibular ganglion
the facial nerve originates between the medulla and pons. It has 2 roots, what are they, what do they contain, and where do they fuse?
motor root contains SVE's to facial muscles and platysma, buccinator and stapedius. The nervus intermedius has GVE and SVA. They fuse in the geniculate ganglia
what are all five branches of the facial nerve (not just the SVE branches, but ALL of them)
greater petrosal nerve
nerve to stapedius
chorda tympani
facial SVE branches
posterior auricular
the greater petrosal nerve carries what fibers to where?
GVE parasympathetics to the pterygopalatine ganglion and eventually to the lacrimal gland
the posterior auricular nerve carries what to where?
SVE's to the posterior digastric, stylohyoid, occipitalis, and auricular muscles
which muscle of mastication depresses the mandible?
the lateral pterygoid