infratemporal fossa and TMJ

Question 1

what passes through foramen ovale?

Answer 1

mandibular div of trigeminal nerve v3 and lesser petrosal nerve

Question 2

what passes through foramen spinosum?

Answer 2

middle meningeal artery and meningeal branch of v3

Question 3

contents of infratemporal fossa

Answer 3

pterygoid venous plexus maxillary artery l and m pterygoid muscles mandibular div of v3 autonomics (chorda tympani)

Question 4

what connects the facial vein to the cavernous sinus?

Answer 4

pterygoid venous plexus

Question 5

where does pterygoid venous plexus drain?

Answer 5

maxillary vein

Question 6

maxillary artery course? subdivisions? branches?

Answer 6

lateral to lateral pterygoid m and horizontal across infratemporal fossa mandibular, pterygoid, and palatine subdivisions mandibular –> middle meningeal, inferior alveolar pterygoid–> masseteric, deep temporal, buccal, pterygoid palatine–> posterior superior alveolar, infraorbital, sphenopalatine, descending palatine,

Question 7

what artery passes betwen the two roots of the auriculotemporal nerve?

Answer 7

middle meningeal artery

Question 8

what artery travels w the inferior alveolar nerve? course?

Answer 8

inferior alveolar artery enters mandibular canal and leaves through the mental foramen

Question 9

artery supply for lower jaw?

Answer 9

inferior alveolar artery

Question 10

what arteries pass between pericranium and temporalis m?

Answer 10

deep temporal arteries

Question 11

4 terminal branches of maxillary a

Answer 11

posterior superior alveolar infraorbital sphenopalatine descemding palatine

Question 12

posterior superior alveolar

Answer 12

supplies molars/premolars pierces maxilla tuberosity

Question 13

infraorbital a

Answer 13

out through inferior orbital fissure through floor of orbit to upper incisors ansd canines and sinus mucous membranes –> enters face through infraorbital foramen to maxillary face region

Question 14

what artery supplies the nasal cavity sinuses?

Answer 14

sphenopalatine foramen

Question 15

descending palatine artery

Answer 15

bifurcates in the pterygopalatine canal into lesser and greater palatine arteries –> supply the hard and soft palates lesser –> soft greater ->hard

Question 16

lateral vs medial pterygoid muscles

Answer 16

lateral - horizontal, V3, opens mouth (protracts mandible), active in chewing medial - vertical, only m innervated by main trunk of V3, elevates and protracts mandible

Question 17

what muscle elevates mandible? what muscle elevates AND retracts? both innervated by?

Answer 17

masseter temporalis (both) v3 mandibular nerve

Question 18

Question 19

Question 20

mandibular division of v3

anterior vs posterior division

Answer 20

before main split, it gives off meningeal nerve and medial pterygoid nerve

***anterior div is smaller and mostly motor (deep temporal x2, buccal, lateral pterygoid, masseteric)

****posterior div is larger and mostly sensory (auriculotemporal, mylohyoid, mental, inferior alveolar, lingual)

Question 21

two branches off main trunk V3?

Answer 21

meningeal nerve and medial pterygoid nerve

Question 22

meningeal nerve is SENSORY. it enters cranial fossa via____________

supplies __________

Answer 22

foramen spinosum

dura of middle cranial fossa

Question 23

buccal nerve

Answer 23

the only sensory branch in anterior mandibular div of v3

passes between the two heads of the lateral pterygoid muscle

Question 24

what nerve passes between the two heads of the lateral pterygoid m?

Answer 24

buccal nerve

Question 25

buccal nerve is NOT --------

Answer 25

motor to the buccinator

Question 26

all motor nerves of the anterior div of V3 enter infratemporal fossa between ______ and \_\_\_\_\_\_\_\_ the sensory branch _____ enters the infratemporal fossa between the \_\_\_\_\_\_\_\_\_\_

Answer 26

skull and upper head of lateral pterygoid m buccal nerve; two heads of the lateral pterygoid m

Question 27

three branches of posterior div of v3

Answer 27

auriculotemporal n lingual n inferior alveolar n

Question 28

auriculotemporal nerve ascends anterior to ______ and posterior to\_\_\_\_\_

Answer 28

the ear; superficial temporal artery

Question 29

sensory to TMJ?

Answer 29

auriculotemporal n

Question 30

sensation from anterior 2/3 of tongue and mouth floor?

Answer 30

lingual nerve

Question 31

what joins the lingual nerve?

Answer 31

chorda tympani

Question 32

what descends posterior and lateral to lingual nerve?

Answer 32

inferior alveolar nerve

Question 33

sensation to lower jaw and gums/teeth?

Answer 33

inferior alveolar artery

Question 34

mental nerve branches off of ____ and passes through\_\_\_\_\_ supplies sensation to\_\_\_

Answer 34

inferior alveolar n; mental foramen chin/lower lip

Question 35

other than the mental nerve, what else branches off the inferior alveolar nerve and what does it innervate?

Answer 35

nerve to the mylohyoid mylohyoid and anterior belly of digastric muscle

Question 36

what is the only motor branch of posterior v3 division

Answer 36

nerve to the mylohyoid

Question 37

parasympathetic innervation - of parotid gland? - of submandibular and sublingual glands/taste sensation for ant 2/3?

Answer 37

- preganglionic cell bodies in inf. salivatory nucleus in upper medulla and course w CNIX --\> postganglionic in the otic ganglion --\> axons course with auriculotemporal nerve to the parotid gland -- -preganglionic cell bodies in the superior salivatory nucles in pontine tegmentum --\> course w CNVII and chorda tympani --\> follows lingual nerve and preganglionic synapse in the submandibular ganglion --\> postganglionic are secretomotor and innrvate the glands and taste fibers have cell bodies in geniculate ganglion

Question 38

TMJ is between

Answer 38

temporomandibular joint head of mandible and articular tubercle/mandibular fossa of the temporal bone

Question 39

tmj syndrome from

Answer 39

stress-related use of tmj like granding teeth --\> causes facial pain

Question 40

tmj

Question 41

upper part of tmj is surrounded by \_\_\_\_\_ lower part is surrounded by \_\_\_\_\_\_\_ they limit?

Answer 41

loose fibers that attach articular disc to articular tubercle and mandibular fossa - tight fibers (same attachments) - limit forward and backward movement of the disc

Question 42

articular disc is made of \_\_\_\_\_\_ type of joint? hinge movements occur in lower or upper compartment?

Answer 42

dense fibrous CT synovial joint lower

Question 43

what keeps head of mandible in the mandibular fossa?

Answer 43

three ligaments (1 lateral and 2 medial) lateral = temporomandibular ligament (zygomatic process to the lateral neck of mandible) --\> lateral stability medial = sphenomandibular(medial to capsule) and stylomandibular (styloid process to andlge and posterior mandible\_

Question 44

tmj movement

Answer 44

only the mandible moves 4 muscles of mastication move it --\> masseter, lateral and medial pterygoid, and temporalis depression of mandible --\> lateral pterygoid elevation of mandible --\> masseter and medial pterygoid and temporalis