Z14 - Temporal And Infratemporal Region

Front 1

in what bone is the external acoustic meatus located?

Back 1

temporal

Front 2

what bone is teh styloid process attached to?

Back 2

temporal

Front 3

what bone is the pterygoid fossa a part of?

Back 3

sphenoid

Front 4

what bone is the mastoid process on?

Back 4

the temporal

Front 5

name the 6 unpaired bones of the skull

Back 5

vomer, sphenoid, ethmoid, frontal, occipital, mandible

Front 6

name the 8 paired bones of the skull

Back 6

nasal, parietal, temporal, inferior nasal concha, lacrimal, zygomatic, maxilla

Front 7

the temporomandibular joint is a diarthrodial joint, which means it has movement in 2 planes. what 2 classes of joints does this joint fall in to?

Back 7

1) hinge- as mandible depresses, the mandibular condyle rotates on the inferior surface of the articular disk
2) sliding- as mandible open further, the mandibular head and disk slid forward to lie just inferior to the articular tubercule of teh temporal bone

Front 8

where does the articular disk of the mandibulotemporal joint lie?

Back 8

between the head of the mandibular condyle and the mandibular fossa of the temporal bone

Front 9

there are 3 ligaments that maintain the integrity of the joint

Back 9

1) temporomandibular lig
2) stylomandibular lig
3) sphenomandibular lig.

Front 10

name the 3 mm of mastecation that close the mandible

Back 10

1) temporalis m.
2) masseter m.
3) medial pterygoid m.

Front 11

what factors/mm open the mandible?

Back 11

1) gravity
2) lateral pterygoid m.
3) supra and infrahyoid mm. with sudden or resisted opening

Front 12

what nerve innervates all of the mm of mastication?

Back 12

branches of the mandibular n. (V3) innervate ALL mm of mastication

Front 13

which branch of the trigeminal nerve contains all of the motor fibers?

Back 13

V3- mandibular branch

Front 14

what are the 8 motor mm's innervated by V3?
-4 mm of mastication
-2 tensor mm
-2 misc. mm

Back 14

1) masseter m, 2) temporalis m, 3) & 4) medial and lateral pterygoid mm., 5) tensor veli palatini m. and 6) tensor tympani m, and 7)mylohyoid and 8) anterior belly of the digastric m.

Front 15

describe the dermatomes of CN V innervations

Back 15

ophthalmic (V1): anterior scalp and face, eyebrows, medial canthus of eye, medial nose
maxillary (V2): temporal region, cheek, lateral canthus of eye, lateral nares, upper lip
mandibular (V3): lateral head between temple and anterior ear, to lower lip, and chin

Front 16

what does the auriculotemporal branch of V3 encircle?

Back 16

the middle meningeal a.

Front 17

what branch of V3 does the following?
-sensation to the auricle and temporal region
-articular fibers to the temporomandibular joint
-postganglionic parasympathetic fibers to the parotid gland

Back 17

the auriculotemporal n.

Front 18

what branch of V3 does the following?
-gives off the nerve to the mylohyoid, then enters the mandibular foramen
-supplies all teeth in mandible
terminates as the mental n. conveying senstation from the chin and lower lip

Back 18

the inferior alveolar n.

Front 19

what branch of V3 does the following?
-conveys general senatin from teh anterior 2/3's tongue and mouth, receives a branch of the facial nerve (VII) via the chorda tympani in the infratemporal fossa

Back 19

the lingual n.

Front 20

what branch of V3 does the following?
-conveys sensation from the skin and mucous membrane of the cheek

Back 20

buccal n.

Front 21

differentiate between the 2 named buccal nn's:
-what do they branch from
-sensory or motor?

Back 21

1) buccal branch of the facial n. (VII) is motor
2) buccal branch of the mandibular (V3) branch of the trigeminal n. (V) is sensory

Front 22

what mm does the buccal branch of V3 pierce, and what is the significance of this?

Back 22

it pierces the lateral pterygoid m.; there is a risk of entrapment in this m--> hypersensitivity in cheek

Front 23

what "nerve"
-branches from the facial n. (VII) to join the lingual n. (V3)
-conveys special sensation of taste from anterior 2/3 of tongue
-carries pregang. para. fibers from the facial n (VII) to the submandibular ganglion

Back 23

the chorda tympani

Front 24

what fiber types are contained in the chorda tympani? what do they innervate?

Back 24

1) sensory- convey taste from anterio 2/3 of the tongue
2) autonomic- convey pregang. para. fibers from the brain stem via the facial n (VII) to the submandibular ganglion

Front 25

the parasym fibers that go through corda tympani to the parotid gland originate from which CN? trace its course.

Back 25

IX (the glossopharyngeal n.) via the lesser petrosal branch

inferior salivatory nucleus --pre--> CN IX --pre--> lesser petrosal n. --> otic ganglion --post--> auriculotemporal n. (V3) --post--> parotid gland

Front 26

what muscle divides the maxillary a. into 3 parts?

Back 26

the lateral ptyergoid m.

Front 27

name the 3 divisions of the maxillary a

Back 27

1) mandibular division
2) pterygoid division
3) pterygopalatine division

Front 28

name the 5 branches off the first part of the maxillary a (mandibular division); which foramen do they enter?
1) mandibular foramen
2) foramen ovale
3) external auditory meatus
4) petrotymopanic fissure
5) foramen spinosum

Back 28

1) deep auricular a. -external auditory meatus
2) anterior tympanic a. -petrotympanic fissure
3) middle meningeal a. -foramen spinosum
4) inferior alveolar a. -mandibular foramen
5) accessory meningeal a. -foramen ovale

Front 29

name the 4 branches that come off of the 2nd part of the maxillary a. (pterygoid division)

Back 29

1) deep temporal aa.
2) masseteric a.
3) pterygoid aa.
4) buccal a.

Front 30

name the 4 branches that come off of the 3rd part of the maxillary a. (pterygopalatine division)

Back 30

1) posterior superior alveolar a.
2) infraorbital a.
3) sphenopalatine a.
4) descending (greater) palatine a.

Front 31

CC: Damage to the mandibular n

Back 31

-cannot clinch jaw tightly; difficulty chewing
-when mouth opens, the jaw deviates TOWARDS the affected side B/C: the lateral pterygois deviate the mandible towards the midline (adduction) as they open the mandible; when a lateral ptyerygoid weakness, the opposite "good" m. wil push the mandible toward the weak side

Front 32

CC: inferior alveolar n. block

Back 32

-used by dentists to anesthetize the mandibular teeth (feel for lingula)
-anesthetic is injected around the inferior alveolar n. near its entrance into the mandibular foramen
-often the lingual n. will be anesthetized, too
-carefeul not to place needle too far posterior--> penetration of parotid gland and numb CN VII --> facial paralysis

Front 33

CC: dislocation of the TMJ

Back 33

-mandibular condyle slides too far anteriorly and ends up anterior to the articular tubercule; jaw will not close
-to reduce, mandible must be pushed 1st inferiorly, then posteriorly
-damage to n. branches can occur