Temporal and infra temporal Fossa Flashcards
What divides the temporomandibular joint in two?
Articular disc of fibrocartilage
What type of joint is the temporomandibular joint?
Synovial
What are the two compartments of the temporomandibular joint and what motion do they do?
Superior- gliding (back and forth)
Inferior- hinge ( open and close)
What does the articular disc attach to?
Joint capsule
Tendon of the lateral pterygoid
What are the muscles of mastification?
Temporalis
Masseter
Medial pterygoid
Lateral pterygoid
What are all the muscles of mastification innervated by?
V3 (mandibular branch)
What is the action of the Temporalis?
Elevate mandible
Right and left lateral movements
Retrusion of mandible
What is the action of the massater muscle?
Elevate mandible
Move mandible right and left
Protrusion of mandible
Retrusion of mandible
What is the origin of the lateral pterygoid muscles?
Superior head- sphenoid bone
Inferior head- lateral pterygoid plate
What is the insertion of the lateral pterygoid muscle?
Temporal mandibular joint
Mandible
What are the actions of the lateral pterygoid muscle
Right and left lateral movements
Depress and protrude mandible
What is the action of the medial pterygoid ?
Elevate the mandible
Protrusion of the mandible
Right and left movements
What four spaces have communication with the infratemporal fossa?
Temporal fossa
Orbit
Middle cranial fossa
Pterygopalantine fossa
What two divisions does the mandibular trigeminal nerve divide into whe it enters the infratemporal fossa?
Anterior and posterior
What are the two branches off the main trunk of the mandibular branch of the trigeminal?
Nerve to the medial pterygoid
Meningeal branch
What are the anterior branches of the mandibular branch of the trigeminal?
Nerve to the massater
Nerve to the lateral pterygoid
Deep temporal nerves
Buccal nerve
What type of innervation is the buccal nerve?
Sensory to the skin and mucosa of cheek
What are the 4 posterior nerves from the mandibular division of the trigeminal
Nerve to the mylohyoid
Inferior alveolar nerve
Lingual nerve
Auriculotemporal nerve
What nerve does the inferior alveolar nerve give off?
Nerve to the mylohyoid
What type of ganglion is the optic ganglion?
Parasympathetic
What nerve carries preganglionic parasympathetic fibers to the otic ganglion?
Lesser petrosal nerve
What nerve carries postganglionic parasympathetics away from the otic ganglion?
Auriculotemporal n.
What nerve does the chorda tympani meet up with?
Lingual nerve
What two fibers does the chorda tympani contain when it meets up with the lingual nerve?
Taste fibers for the anterior 2/3 of tongue
Parasympathetic preganglionic fibers that will synapse in the submandibular ganglion
What do the postganglionic parasympathetic fibers from the submandibular ganglion innervate?
Submandibular and sublingual salivary glands
What are the 3 parts of the maxillary artery?
Mandibular part
Pterygoid part
Pterygopalantine part
What are the five branches of the mandibular part of the maxillary artery
Deep auricular Anterior tympanic Middle Meningeal Accessory Meningeal Inferior alveolar
What artery does the inferior alveolar give off before entering the mandibular foramen?
Artery to the mylohyoid
What are the four branches of huge pterygoid part of the maxillary artery?
Masseteric artery
Anterior and posterior deep temporal arteries
Pterygoid arteries
Buccal arteries
Where is the pterygoid plexus?
Between the pterygoid muscles and the temporalis muscle
What communicates with the pterygoid plexus?
Cavernous sinus
Inferior opthalmic vein
Deep facial veins
