MM of Mastication, TMJ, and Infratemporal Fossa

Question 1

pterygoid fascia

Answer 1

covers medial surface of the medial pterygoid and splits around the lateral pterygoid

Question 2

pterygospinous ligament

Answer 2

b/w medial and lateral pterygoid mm

Question 3

sphenomandibular ligament

Answer 3

b/w sphenoidal spine and the lingula of the mandible

maxillary a, v, and auriculotemporal n pass b/w ligament and neck of mandible

Question 4

temporalis m

Answer 4

inn by ant and post deep temporal n

Question 5

masseter m

Answer 5

inn by masseteric n (branch of V3)

Question 6

medial pterygoid m

Answer 6

inn by V3

medial pterygoid enters the postero-medial border

Question 7

lateral pterygoid m

Answer 7

inn by branch of V3

n to the lateral pterygoid enters the supero-medial border of the upper head

Question 8

b/w two heads of lateral pterygoid m

Answer 8

maxillary a and buccal n

Question 9

b/w medial and lateral pterygoid m

Answer 9

inferior alveolar and lingual n

Question 10

Jaw-Jerk Reflex

Answer 10

rapid depression of chin - stretching of neuromuscular spindles in masseter m - masseteric n (afferent) - mesencephalic nucleus of V - motor nucleus of V - masseric n (efferent) - neuromusuclar endplates in the masseter m - contraction of masseter m

Question 11

normal opening of the mouth

Answer 11

gravity

lateral pterygoid m

Question 12

wide opening of the mouth

Answer 12

lateral pterygoid m

suprahyoid m

Question 13

closing the mouth

Answer 13

temporalis m
masseter m
medial pterygoid m

Question 14

superior joint of TMJ

Answer 14

gliding joint

Question 15

inferior joint of TMJ

Answer 15

hinge joint

Question 16

articular disk TMJ

Answer 16

attached to sphenomeniscus m

Question 17

newborn mandible

Answer 17

mental angle 175

Question 18

four year old mandible

Answer 18

mental angle 140

Question 19

adult mandible

Answer 19

mental angle 110-120

due to development of dentition

Question 20

senior mandible

Answer 20

mental angle 140

due to loss of dentition

Question 21

fracture of the mandible neck

Answer 21

compromise the maxillary a, v, or auriculotemporal n

Question 22

fracture of the mandible ramus

Answer 22

damage to the lingual or inferior alveolar n

Question 23

fracture of the mandible body

Answer 23

compress the inferior alveolar n and vessels

Question 24

recurrent meningeal n

Answer 24

GSA fibers to the meningeal dura via foramen spinosum

Question 25

buccal n

Answer 25

GSA fibers to the epithelia of the inner and outer cheek

Question 26

auriculotemporal n

Answer 26

joins w/ postganglionic sympathetic fibers from middle meningeal plexus to inn parotid gland

Question 27

lingual n

Answer 27

GSA fibers to the anterior 2/3 of the tongue

Question 28

chorda tympani n

Answer 28

joins w/ lingual n
SVA fibers to the anterior two thirds of the tongue
GVE parasympathetic fibers to the submandibular and sublingual glands

Question 29

inferior alveolar n

Answer 29

inn mylohyoid and anterior digastric m
GSA fibers to the teeth and gingivae
mental n - GSA to chin region

Question 30

middle meningeal a

Answer 30

foramen spinosum

supplies dura mater and endocranium

Question 31

inferior alveolar a

Answer 31

mandibular foramen

supplies mandible, teeth, and gingivae

Question 32

posterior superior alveolar a

Answer 32

supplies molar teeth and gingiva of the upper 1/2 jaw

Question 33

infraorbital a

Answer 33

infraorbital fissue and canal

anterior upper 1/2 of the jaw

Question 34

descending palatine a

Answer 34

lesser and greater palatine a

supply the soft and hard palate