V- Infratemporal Region

Question 1

contents

Answer 1

1. temporalis inferior
2. lateral and medial pterygoids
3. maxillary A and V
4. pterygoid venous plexus
5. mandibular (V3)
6. chorda tympani (CN VII)
7. otic ganglion

glossopharyn synapses at otic ganglion

Question 2

boundaries

Answer 2

1. floor/inferior = medial pterygoid
2. lateral = ramus of mandible
3. posterior = mastoid process, tympanic plate
4. medial = lateral pterygoid plate
5. superior = greater wing sphenoid
6. anterior = maxilla

Question 3

muscles of mastication

Answer 3

1. temporalis
2. massester
3. medial and lateral ptyergoids

Question 4

lateral ptyergoid m

Answer 4

og @ lateral surface of lateral ptyergoid plate > in @ TMJ + head and neck of mandible

Question 5

medial pterygoid m

Answer 5

og @ medial surface lateral pterygoid plate > in @ medial ramus and angle mandible

will move jaw to contralat side

antagonist of masseter

Question 6

TMJ Joint articulations

Answer 6

articular surfaces: head of mandible-mandibular fossa, articular tubercule

articular disc: divides joint into upper (gliding) and lower cavity (hinge)

Question 7

TMJ ligaments

Answer 7

1. lateral
2. sphenomandibular
3. stylomandibular - not technically a part of capsule

Question 8

elevation muscles (close mouth)

Answer 8

1. temporal
2. masseter
3. medial pterygoid

Question 9

depression muscles (open mouth)

Answer 9

1. lateral pterygoid
2. hyoid muscels (supra and infra)
3. gravity

Question 10

protrusion muscles

Answer 10

1. lateral pterygoid
2. massester
3. medail pterygoid

Question 11

retrusion muscles

Answer 11

1. temporalis
2. masseter

Question 12

lateral movements

Answer 12

1. temporalis ipsilateral
2. pterygoids contralateral
3. masseter

Question 13

nerve supply

Answer 13

1. auriculotemporal N
2. masseteric N (from V3)

Question 14

locked jaw

Answer 14

when head of mandible trapped in front of articular tubercle

Question 15

branches of maxillary A

Answer 15

1. inferior alveolar
2. middle meningeal
3. deep temporal
4. infraorbital
5. post superior alveolar
6. sphenopalatine to nasal cavity
7. descending palatine

alveolar = teeth sockets

Question 16

inferior alveolar A

Answer 16

thru mandibular foramen to mandibular teeth
-branches off to mental A thru mental foramen

Question 17

posterior superior alveolar A

Answer 17

-thru maxilla bone into maxillary air sinus for posterior maxillary teeth

Question 18

infraorbital A

Answer 18

into inferior orbital fissure then run in floor of orbit
-out infraorbital foramen

Question 19

middle meningeal A

Answer 19

into foramen spinosum
-looped by auriculotemporal N
-deep to pterion

supply dura mater

Question 20

sphenopalatine A

Answer 20

into sphenopalatine foramen to supply nasal cavities

Question 21

descending palatine A

Answer 21

descends into pterygomaxillary fissure to supply palate

Question 22

pterygoid venous plexus anastomoses with

Answer 22

cavernous sinus + maxillary vein with emissary veins (directly connect veins of cranial vault with scalp/face)

no valves!!

Question 23

nerve to mylohyoid

Answer 23

supplies mylohyoid and ant belly digastric

from V3

Question 24

mandibular V3 supplies

Answer 24

MAST = 4 mastication muscles
MATT = mylohyoid, ant digastric, 2 tensors (tympani, veli palatini)

Question 25

sensory branches of V3

Answer 25

1. meningeal branch to dura mater
2. buccal N/long buccal to cheek
3. lingual N to anterior 2/3 tongue, carries chorda tympani

Question 26

chorda tympani

Answer 26

from VII for SVA taste to anterior 2/3 tongue + GVE parasymps to submandibular and sublingual G
-runs deep to tympani membrane over malleus

Question 27

inferior alveolar N

Answer 27

enters mandibular foramen to supply mandibular teeth and emerge thru mental foramen as mental N
-gives off nerve to mylohyoid before entering mandible

Question 28

auriculotemporal N

Answer 28

cutaneous to auricle, EAM, tympanic membrane, parotid gland, TMJ, scalp ant ear
-carries IX parasymp fibers from otic ganglion to parotid gland