Temporal and Infratemporal Flashcards Preview

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Flashcards in Temporal and Infratemporal Deck (24):
1

muscles of mastication
-formed embryologically from...
-innervated by...
-difference compared to facial nerve in terms of embryological development and innervatiouin

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

2

muscles of mastication names

temporalis
masseter
lateral pterygoid
madial pterygoid

3

temporal fossa
-layman's name
-boundaries
-roof

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

4

temporal fascia
-splits into...

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

5

temporal fossa floor

formed by the articulations of the squamous part of the
-temporal bone
-frontal bone
-parietal bone
-greater wing of the sphenoid

6

what is the pterion
-what crosses over it?

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

7

when is the middle meningeal artery at risk

lateral head injuries

8

temporal fossa contents

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

9

auriculotemporal nerve
-function
-location

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

10

infratemporal fossa
-location

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

11

infratempral fossa
-borders

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

12

foraminae of the infratemporal fossa
-contents in each

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

13

primary nerve of the infratemporal fossa

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

14

branches of V3 of trigeminal nerve

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

15

auriculotemporal nerve
-function

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

16

inferior alveolar nerve
-function

sensory to the
-teeth of the mandible
-skin overlying the chin and mandible

17

lingual nerve
-function
-chorda tympani function

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

18

buccal nerve
-function

sensation over cheek

19

vessels of the infratemporal fossa

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

20

pterygopalatine fossa
-continuous medially...
-continuous anteriorly...
-continuous posteriorly...
-continuous medially...
-lies between

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

21

pterygopalatine fossa contents

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

22

temporomandibular joint
-type of joint
-components

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

23

TMJ articular capsule
-thickened _____ as the _____
-other ligaments that support the connection of the mandible to the base of the skull

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)

24

TMJ movements

rotation during the initial part of jaw opening
-head of mandible rotates with articular disc toward articular tubercle