Temporal and Infratemporal

Question 1

muscles of mastication

• formed embryologically from…
• innervated by…
• difference compared to facial nerve in terms of embryological development and innervatiouin

Answer 1

formed from 1st branchial arch
innervated by mandibular division (V3) of trigeminal nerve
facial expressionj
-develop from 2nd branchial arch
-innervated by facial nerve

Question 2

muscles of mastication names

Answer 2

temporalis
masseter
lateral pterygoid
madial pterygoid

Question 3

temporal fossa

• layman’s name
• boundaries
• roof

Answer 3

the temple
temporal lines (formed by borders of origin of temporalis muscle)
frontal bone
zygomatic bones
roof
-temporal fascia over the muscle

Question 4

temporal fascia

-splits into…

Answer 4

superficial part
-attached to zygomatic arch
deep part
-continuous with deep fascia of masseter

Question 5

temporal fossa floor

Answer 5

formed by the articulations of the squamous part of the

• temporal bone
• frontal bone
• parietal bone
• greater wing of the sphenoid

Question 6

what is the pterion

-what crosses over it?

Answer 6

area of articulation of the temporal bone, frontal bone, parietal bone, and greater wing of sphenoid
middle meningeal artery crosses over it within the cranial cavity

Question 7

when is the middle meningeal artery at risk

Answer 7

lateral head injuries

Question 8

temporal fossa contents

Answer 8

temporalis muscle
superficial temporal artery (over temporalis muscle; one of two terminal branches of external carotid artery)
auriculotemporal nerve (over muscle)

Question 9

auriculotemporal nerve

• function
• location

Answer 9

sensory to the temporal region
originates in the infratemporal fossa as a branch of V3
emerges anterior to the auricle from deep to the parotid gland

Question 10

infratemporal fossa

-location

Answer 10

inferior and deep to the zygomatic arch and posterior to the mandible

Question 11

infratempral fossa

-borders

Answer 11

lateral wall
-ramus of mandible
medial wall
-lateral pterygoid plate
anterior wall
-infratemporal surface of maxilla
posterior wall
-condylar process of mandible
-styloid process of temporal bone
roof
-inferior surface of greater wing of sphenoid bone
floor
-level where medial pterygoid attaches to angle/ramus of mandible

Question 12

foraminae of the infratemporal fossa

-contents in each

Answer 12

foramen ovale
-mandibular division of trigeminal nerve
foramen spinosum
-middle meningeal artery

Question 13

primary nerve of the infratemporal fossa

Answer 13

mandibular division (V3) of trigeminal nerve
exits foramen ovale as mandibular nerve and then branches in many named nerves

Question 14

branches of V3 of trigeminal nerve

Answer 14

auriculotemporal
inferior alveolar
lingual
buccal
named muscular branches for each muscle of mastication

Question 15

auriculotemporal nerve

-function

Answer 15

sensory to around the ear
carries glossopharyngeal fibers to the parotid [gland]
production of saliva

Question 16

inferior alveolar nerve

-function

Answer 16

sensory to the

• teeth of the mandible
• skin overlying the chin and mandible

Question 17

lingual nerve

• function
• chorda tympani function

Answer 17

somatosensation to the anterior 2/3 of the tongue
chorda tympani
-branch of facial nerve that joint lingual to carry taste from anterior 2/3 of the tongue

Question 18

buccal nerve

-function

Answer 18

sensation over cheek

Question 19

vessels of the infratemporal fossa

Answer 19

maxillary artery

• terminal branch of external carotid
• number of branches that are described with respect to their position to the lateral pterygoid
• middle meningeal and inferior alveolar are most important and easiest to find during dissection

Question 20

pterygopalatine fossa

• continuous medially…
• continuous anteriorly…
• continuous posteriorly…
• continuous medially…
• lies between

Answer 20

continuous medially from infratemporal fossa through pterygomaxillary fissure
continuous anteriorly with the orbit through the inferior orbital fissure
continuous posteriorly with middle cranial fossa through foramen rotundum
continuous medially with nasal cavity through the sphenopalatine foramen
lies between
-sphenoid bone posteriorly
-maxilla anteriorly

Question 21

pterygopalatine fossa contents

Answer 21

foramina
-foramen rotundum
-inferior orbital fissure
nerves
-maxillary division of V2 branches into infraorbital nerve carrying sensation from the skin overlying the maxillary and zygomatic regions
vessels
-maxillary artery branches
-infraorbital artery

Question 22

temporomandibular joint

• type of joint
• components

Answer 22

modified synovial hinge joint
components
-head of condyle of mandible
-mandibular fossa with articular tubercle
-articular disc within joint that is fused with articular capsule

Question 23

TMJ articular capsule

• thickened _____ as the _____
• other ligaments that support the connection of the mandible to the base of the skull

Answer 23

thickened laterally as the lateral temporomandibular ligament (strong ligament of the capsule
other ligaments
-stylomandibular (styloid process of the temporal bone)
-sphenomandibular (spine of sphenoid bone)

Question 24

TMJ movements

Answer 24

rotation during the initial part of jaw opening

-head of mandible rotates with articular disc toward articular tubercle