infra-temporal

Question 1

what makes up the anterior wall of the infratemporal fossa

Answer 1

the posterior surface of the maxilla bone

Question 2

what makes up the medial wall of the infratemporal fossa

Answer 2

the lateral plate of the pterygoid process (sphenoid bone)

Question 3

what makes up the roof of the infratemporal fossa

Answer 3

• squamous of the temporal bone

- greater wing of sphenoid bone

Question 4

what makes up the lateral wall of the infratemporal fossa

Answer 4

ramus of mandible

Question 5

what sort of joint is the temporomandibular (TMJ)

Answer 5

atypical synovial

• articulate surface is covered by fibrous cartilage

Question 6

what is the difference between a typical and an atypical synovial joint

Answer 6

typical = hyaline cartilage at articulate surface

atypical = fibrous cartilage at articulate surface

Question 7

what ligaments stabilise the TMJ

Answer 7

sphenomandibular ligament

stylomandibular ligament

lateral ligament

Question 8

articular disc of TMJ

Answer 8

sits inside the joint, separating it into an upper and lower joint cavity

Question 9

what muscles are involved in depressing the TMJ

Answer 9

• myohyoid
• genohyoid
• digastrics

Question 10

if the temporalis and masseter muscle has a mass what movement of the TMJ will be limited?

Answer 10

elevation of the mandible will be limited

Question 11

what muscles are involved in mastication

Answer 11

• temporalis
• masseter
• pterygoid muscles (both lateral and medial)

Question 12

describe the location of the masseter muscle

Answer 12

runs from the angle and body of the mandible

up to the zygomatic arch and the maxillary process of the zygomatic arch

Question 13

what nonvascular structures run inside the infratemporal fossa

Answer 13

• pterygoid muscles

- sphenomandibular ligament

Question 14

what vascular structures run inside the infratemporal fossa

Answer 14

MAXILLARY artery

• middle meningeal artery (exit through foramen spinosus)
• inferior alveolar artery

Question 15

what nerves run through the infratemporal fossa

Answer 15

• V3 mandibular nerve (via foramen ovale)
• glossopharyngeal nerve
• facial nerve

Question 16

branches of V3 as it enters the infratemporal fossa

-be specific

Answer 16

gives off an anterior branch
- buccal nerve

gives off a posterior branch

• inferior alveolar nerve
• lingual nerve
• auricotemporal

Question 17

lesser petrosal nerve

Answer 17

branch of glossopharyngeal (9)

• goes to tympanic plexus in middle ear then back to give the parasympathetic supply to the parotid gland
• runs through the infratemporal fossa on its course

Question 18

what nerve does chord tympani join with

Answer 18

lingual nerve

Question 19

importance of infection in pterygoid plexus

Answer 19

the pterygoid sinus gives off emissary veins which drain back to the cavernous sinus in the cranial cavity
- can cause dysfunction to internal carotid artery and abducens nerve that run inside sinus

Question 20

borders of pterygopalatine fossa

Answer 20

anterior = posterior border of maxilla
roof = sphenoid bone
medially = palatine bone
posteriorly =  lateral plates of pterygoid process (sphenoid bone)

Question 21

what enters the pterygopalatine fossa

Answer 21

foramen rotundum V2 (*purely sensory)

sphenopalatine foramen (opens to palatine bone)
      -posterior epistaxis

Question 22

what sits close to V2

Answer 22

internal carotid artery

- carotid canal runs close to foramen rotundum

Question 23

what artery runs inside the pterygopalatine fossa

Answer 23

sphenopalatine artery off the maxillary artery

Question 24

name 3 branches off the maxillary artery

Answer 24

• middle meningeal artery
• inferior alveolar artery
• sphenopalatine artery

Question 25

what surgery can be done to a patient with uncontrollable hay fever symptoms

Answer 25

surgeon goes to pterygopalatine fossa and destroy the pterygopalatine ganglion to stop the symptoms of running nose and eyes

Question 26

what parasympathetic nerve enters the pterygoplatine fossa

Answer 26

greater petrosal nerve - a branch off facial nerve

• joins ganglion and runs to nasal cavity and lacrimal (eyes) hence symptoms
• goes to nasal-oral cavity