Infratemporal Fossa

Question 1

what are the boundaries of the infratemporal fossa?

Answer 1

lateral- ramus of the mandible
medial- lateral pterygoid plate
posterior- styloid process and external auditory meatus
superior- greater wing of the sphenoid
inferior- level of angle of mandible

Question 2

what are the features of the sphenoid bone?

Answer 2

greater wing
medial pterygoid plate
lateral pterygoid plate
sphenoid spine

Question 3

what are the components of the temporomandibular joint?

Answer 3

mandibular fossa
articular disc
mandibular condyle
articular tubercle

Question 4

what are the superficial muscles of mastication and what is their main function?

Answer 4

temporalis
masseter

closes the jaw

Question 5

where does the temporalis and masseter muscles attach ?

Answer 5

temporalis- attaches to coronoid process of mandible
masseter- attachment to lateral surface of ramus of mandible

Question 6

what are the contents of the infratemporal fossa?

Answer 6

2 deep muscles of mastication
maxillary artery
branches of V3 and chorda tympani

Question 7

what are the two deep muscles of mastication and what are their functions?

Answer 7

lateral pterygoid - opens jaw and moves chin towards opposite side

medial pterygoid- closes the jaw

Question 8

where do the medial and lateral pterygoid muscles attach?

Answer 8

lateral - attaches to lateral pterygoid plate and condyle of mandible

medial - attaches to lateral pterygoid plate and medial surface of angle of mandible

Question 9

all 4 muscles of mastication are innervated by what nerve?

Answer 9

mandibular division of the trigeminal (V3)

Question 10

where does V3 enter into the infratemporal fossa of the face?

Answer 10

foramen ovale

Question 11

what are the branches of the mandibular branch of the trigeminal nerve (V3)?

Answer 11

auriculotemporal
chorda tympani (branch of VII joins V3)
long buccal
lingual
inferior alveolar ——> mental nerve

Question 12

what does the auriculotemporal nerve supply?

Answer 12

sensory to region of external ear and postganglionic parasympathetic fibers to parotid gland

Question 13

what does the chorda tympani supply?

Answer 13

taste sensation from anterior tongue and preganglionic parasympathetic fibers to submandibular and sublingual glands

Question 14

what does the inferior alveolar nerve supply?

Answer 14

sensory to mandibular teeth

Question 15

what does the lingual nerve supply?

Answer 15

sensory to anterior 2/3 of the tongue

Question 16

what does the long buccal nerve supply?

Answer 16

sensory to the cheek

Question 17

what nerve/artery enters the mandibular foramen?

Answer 17

inferior alveolar nerve (V3) and inferior alveolar artery

Question 18

what comes out of the mental foramen?

Answer 18

mental artery and nerve

Question 19

the middle meningeal artery is a branch from what?

Answer 19

maxillary artery