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114 Cards in this Set
- Front
- Back
The infratemporal fossa is located superficial or deep to the ramus of the mandible?
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deep
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These three structures lie superficial to the infratemporal fossa?
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Masseter Muscle, Zygomatic Arch, and Temporalis Muscle
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Where does the masseter muscle arise from?
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Anterior 2/3 of the zygomatic arch and infratemporal surface of the maxilla
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Where does the masseter insert?
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Ramus of the mandible
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What lies deep to the masseter muscle?
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Temporalis muscle and the ramus of the mandible
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The zygomatic arch is formed by what two bones?
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temporal (zygomatic process) and zygomatic (temporal process)
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Where does the temporalis muscle arise from?
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Temporal fossa and the deep surface of the temporal fascia
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Where does the temporalis insert?
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Coronoid process of the mandible and the anterior border of the mandible
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What is the lateral boundary of the infratemporal fossa?
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Medial surface of the ramus of the mandible
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What is the medial boundary of the infratemporal fossa?
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Lateral pterygoid plate
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What is the anterior boundary of the infratemporal fossa?
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posterior aspect of the maxilla
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What is the posterior boundary of the infratemporal fossa?
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Tympanic plate and styloid process of the temporal bone
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The infratemporal surface of the greater wing of the sphenoid and the squamous temporal form the (roof/floor) of the infratemporal fossa?
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Roof
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The floor of the infratemporal fossa is formed by what?
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The attachment of the medial pterygoid muscle to the mandible
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This feature located in the medial surface of the ramus of the mandible is the opening through which the inferior alveolar nerve passes?
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Mandibular foramen (into the mandibular canal)
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This is the triangular piece of bone that overlies the mandibular foramen antero-medially?
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Lingula
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What attaches to the lingula?
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Sphenomandibular ligament
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The mylohyoid groove transmits this nerve to the floor of the mouth?
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Mylohyoid nerve (V3)
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This bony structure is a thin, wing shaped protrusion posterior to the pterygomaxillary fissure?
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Lateral pterygoid plate
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What is the hook-like process of the medial pterygoid plate?
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The hamulus
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This is the vertical opening formed by the divergence of the maxilla from the lateral pterygoid plate?
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Pterygomaxillary fissure
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The pterygomaxillary fissure connects the infratemporal fossa with this fossa?
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pterygopalatine fossa
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This is a feature located on the posterior aspect of the maxilla and opens into the floor of the orbit?
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Inferior orbital fissure
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This is the concave part of the temporal bone lying anterior to the styloid process and forming the posterior wall of the infratemporal fossa?
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Tympanic plate
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This opening is located in the roof of the infratemporal fossa and transmits the mandibular division of the trigeminal and lesser petrosal nerves?
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Foramen Ovale
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This is a small opening in the roof of the infratemporal fossa which is posterior to the foramen ovale?
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Foramen spinosum
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What does the foramen spinosum transmit?
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middle meningeal artery and meningeal branch of V3
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This bony protrusion can be found posterior to the foramen spinosum and in the roof of the infratemporal fossa?
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Spine of the sphenoid
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What originates at the spine of the sphenoid?
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Sphenomandibular ligament
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This network of veins is located superficial in the infratemporal fossa in close association with the pterygoid muscles?
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Pterygoid venous plexus
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What does the pterygoid venous plexus connect?
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Facial vein with the cavernous sinus
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The pterygoid venous plexus drains into what vein?
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Maxillary vein
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Why is the pterygoid venous plexus clinically relevant?
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provides conduit for the spread of infection to multiple sites
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This is the larger terminal branch of the ECA and is found in the infratemporal fossa?
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Maxillary artery
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where does the maxillary artery arise?
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Behind the neck of the mandible
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How does the maxillary artery enter the infrtemporal fossa?
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between the neck of the mandible and the sphenomandibular ligament
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What is the relationship between the maxillary artery and the lateral pterygoid muscle?
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Usually lateral (superficial) but sometimes deep
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How does the maxillary artery exit the infratemporal fossa?
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anteriorly through the pterygomaxillary fissure
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From posterior to anterior, how can the maxillary artery be divided?
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Mandibular, pterygoid, and palatine
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What two branches come off the mandibular part of the maxillary?
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Middle meningeal and Inferior alveolar artery
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This artery arises from the medial aspect of the mandibular part of the maxillary artery?
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Middle meningeal artery
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This artery arises from the lateral part of the mandibular part of the maxillary artery
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Inferior alveolar artery
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This artery passes between the two roots of the auriculotemporal nerve?
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middle meningeal artery
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What does the middle meningeal artery supply blood to?
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Meninges
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This artery supplies blood to the teeth and gums of the lower jaw and the skin of the chin?
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Inferior alveolar artery
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The inferior alveolar artery passes through what foramen and canal, and where does it exit this canal?
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mandibular foramen and canal, exits at the mental foramen
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What branches come off the pterygoid part of the maxillary artery?
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Masseteric, deep temporal, buccal, and pterygoid
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The masseteric artery courses with the masseteric nerve deep to the tendon of the temporalis and enters the (superficial or deep) surface of the Masseter?
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Deep
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These arteries pass between the temporalis muscles and the pericranium?
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deep temporal arteries
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This artery runs obliquely forward to the lateral surface of the buccinator?
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Buccal artery
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What are the four terminal branches of the maxillary artery?
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Posterior superior alveolar artery, Infraorbital artery, Sphenopalatine artery, Descending palatine artery
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This artery supplies blood to the molar and premolar teeth?
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Posterior Superior Alveolar artery
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Through what does the infraorbital artery exit the infratemporal fossa?
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Inferior orbital fissure
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What does the infraorbital artery supply?
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upper incisor and canine teeth and mucous membrane of the maxillary sinus; Facial tissue over the maxilla
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Which artery passes thorugh the pterygopalatine fossa and exits through an opening on its medial wall, the sphenopalatine foramen?
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Sphenopalatine artery
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What does the sphenopalatine artery supply?
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The sinuses of the nasal cavity
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This canal connects the pterygopalatine fossa to the palate?
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pterygopalatine canal
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Within the pterygopalatine canal, what does the descnding palatine artery bifurcate into?
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Greater and lesser palatine arteries
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Lesser palatine and greater palatine supply what respectively?
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Soft palate and hard palate
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The upper head of the lateral pterygoid muscle arises from what?
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infratemporal surface of the greater wing of the sphenoid bone
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The lower head of the lateral pterygoid muscle arises from what?
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Lateral surface of the lateral pterygoid plate
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Where do fibers of the lateral pterygoid muscle converge and insert?
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pterygoid fossa, a depression on the neck of the mandible
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The deep head of the medial pterygoid muscle arises from the medial surface of this bony feature?
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Lateral pterygoid plate
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Where does the smaller superficial head of the medial pterygoid muscle arise from?
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maxillary tuberosity and pyramidal process of the palatine bone
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Where does the medial pterygoid muscle insert?
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medial surface of the angle of the mandible
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What two muscles acting together form a muscular sling around the angle of the mandible?
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Medial pterygoid muscle and the masseter
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This is the only muscle in the infratemporal fossa that is innervated by nerve fibers that arise from the main trunk of V3
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Medial pterygoid muscle
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Where does the large sensory trunk and small motor trunk unite to form the main trunk of V3?
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just after traversing the foramen ovale in the roof of the infratemporal fossa
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After the main trunk of V3 gives off smaller divisions it branches into two parts; anterior and posterior. Which is Chiefly Sensory?
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Posterior
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What are the two branches off the MAIN trunk of V3?
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Meningeal nerve and Medial pterygoid nerve
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Meningeal nerve carries what kind of nerve fibers?
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GSA
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The medial pterygoid nerve carries nerve fibers of what type?
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SVE
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What muscles does the medial pterygoid nerve innervate ?
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medial pterygoid, tensor veli palatini, and tensor tympani
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What is the only sensory branch of the anterior division of V3?
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Buccal Nerve (GSA)
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The Buccal nerve passes between the heads of which muscle?
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Lateral pterygoid muscle
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The Buccal nerve supplies what?
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Skin and mucosa of the cheek
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What are the 4 branches off the anterior division of the V3?
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Buccal nerve, Deep temporal nerves, masseteric nerve, nerve to the lateral pterygoid
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This nerve ascends vertically to enter the DEEP surface of the temporalis muscle?
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Deep temporal nerve (SVE)
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This nerve traverses the mandibular notch and enters the deep surface of the masseter muscle?
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Masseteric nerve (SVE)
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Where do all the motor nerves of the anterior division of V3 enter the infratemporal fossa?
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between the skull and the upper head of the lateral pterygoid muscle
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What are the three branches of the posterior division of V3?
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Auriculotemporal (GSA), Lingual (GSA), and Inferior Alveolar Nerve (GSA)
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This nerve passes between the sphenomandibular ligament and the neck of the mandible?
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Auriculotemporal nerve
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The auriculotemporal nerve ascends (posterior/anterior) to the ear along with the superficial temporal artery?
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Anterior
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Which nerve has two roots and encircles the middle meningeal artery?
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Auriculotemporal nerve
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This nerve conveys sensory information from the auricle, temporal region, temporomandibular joint, and parotid gland?
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Auriculotemporal nerve
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This nerve runs medial to the lateral pterygoid muscle on the surface of the tensor veli palatini?
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Auriculotemporal nerve
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This nerve enters the infratemporal fossa in between the bottom of the lateral pterygoid and the top of th emedial pterygoid muscle?
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Lingual nerve; inferior alveolar nerve
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During its desccent medial to the lateral pterygoid muscle, the lingual is in what relationship to the inferior alveolar nerve?
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Anterior and medial
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The lingual is joined by this nerve in the deep part of the infratemporal fossa?
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Chorda tympani
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This nerve conveys general sensation from the anterior 2/3 of the tongue?
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Lingual
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This nerve supplies sensation to the teeth and gums of the lower jaw while within the mandibular canal.
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Inferior alveolar nerve
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The inferior alveolar nerve exits the madibular canal at the mental foramen and becomes this nerve?
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Mental nerve
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What does the mental nerve supply sensation to?
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chin and lower lip
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The inferior alveolar nerve gives off this branch just before entering the mandibular canal?
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Nerve to the mylohyoid (SVE)
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What is the ONLY motor branch of the posterior division of V3?
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Nerve to the mylohyoid (SVE)
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This autonomic ganglia lies just below the foramen ovale on the main trunk of V3?
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Ottic Ganglion
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What synapse on the otic ganglion?
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Lesser petrosal (preganglionic GVE of CN9)
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Postganglionic parasympathetic fibers of the otic ganglion course with this nerve to innervate the parotid gland?
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Auriculotemporal Nerve of V3
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What is the function of the ottic ganglion?
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Parotid gland salivation (secretomotor)
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This nerve arises from the facial nerve just before it exits the skull through the stylomastoid foramen?
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Chorda Tympani
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Where does the chorda tympani nerve exit the skull?
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petrotympanic fissure
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Where does the preganglionic parasympathetic fibers of the chorda tympani synapse?
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Submandibular ganglion
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What do the postganglionic parasympathetic fibers from the submandibular ganglion innervate?
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Submandibular and sublingual glands
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SVA fibers of the chorda tympani, whose peripheral processes end in taste buds, have their cell bodies in what ganglion?
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Geniculate
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What is TMJ syndrome caused by?
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Stress related use of TMJ such as teeth grinding (can cause facial pain)
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These two structures form the superior surface of the TMJ?
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Mandibular fossa and articular tubercle
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This superior surface structure of the TMJ is a concave depression in the squamous portion of the temporal bone?
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Mandibular fossa
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This convex structure of the superior surface of the TMJ is located anterior to the mandibular fossa?
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Articular tubercle
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This forms the inferior surface of the TMJ?
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Head of the mandible
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The articular surfaces of the TMJ are lined with what?
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Fibrocartilage
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Loose fibers can be found in the (upper or lower part of the TMJ)?
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Upper
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Tight fibers are found in the (upper or lower part of the TMJ)
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Lower
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The loose and tight fibers in the TMJ function as what?
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Limit the forward and backward movement of the articular disc with mandibular movement
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How many lateral and medial ligaments maintain the head of the mandible in the mandibular fossa?
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One lateral and 2 medial
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