Temporal Area & TMJ
Terms
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- posterior and superior boarder of temporal fossa
- temporal lines
- anterior boundary of temporal fossa
- frontal and zygomatic bones
- lateral boundary of temporal fossa
- zygomatic arch
- inferior boundary of temporal fossa
- infratemporal crest
- lateral border of infratemporal fossa
- ramus of mandible
- medial border of infratemporal fossa
- lateral pterygoid plate
- anterior border of infratemporal fossa
- posterior aspect of maxilla
- posterior border of infratemporal fossa
- tympanic plate and mastoid and styloid process of temporal bone
- superior border of infratemporal fossa
- inferior surface of greater wing of sphenoid
- inferior border of infratemporal fossa
- where medial pterygoid muscle attatches to mandible near its angle
- contents of infratemporal fossa
-
inferior part of temporal m
lateral & medial pterygoid m
maxillary a
pterygoid venous plexus
madibular, inferior alveolar, lingual, buccal, chorda tympani nn
otic gaglion - temporal m
-
elevates mandible
posterior fibers retract mandible
deep temporal branches of madibular n - lateral pterygoid m
-
protude mandible adn depress chin
alone - side to side movement
mandibular n via lateral pterygoid n - masseter m
-
elevates and protrudes mandible closing jaw, deep fibers retract jaw
mandibular n via masseteric - medial pterygoid m
-
elevate mandible closing jaw
alone protrude side of jaw - grinding - maxillary a
- larger of 2 terminal branches of external carotid
- branches of mandibular part of maxillary a
-
deep aricular
anterior tympanic
middle meningeal
accessory meningeal
inferior alveolar - branches of pterygoid part of maxillary a
-
deep temporal (ant & post)
pterygoid a
masseteric
buccal - branches of pterygopalatine part of maxillary a
-
posterior superior alveolar
infraorbital a
decending palatine a
artery of pterygoid canal
pharyngeal a
sphenopalatine a - otic ganglion
-
parasympathetic
infratemporal fossa - lingual n
-
sensory to ant 2/3 of tongue
infratemporal fossa
secretomotor fibers to submandibular & sublingual glands - articular disc
- divides TMJ into 2 compartments
- superior compartment of TMJ
-
gliding movements
protrusion & retrusion - inferior compartment of TMJ
-
depression and elevation
hinge movements - lateral ligament of TMJ
-
strengthens TMJ laterally
prevents posterior dislocation - stylomandibular ligament of TMJ
-
thickening of fiborus capsule of hte parotid gland
doesnt contribute to strength - spheonmandibular ligament of TMJ
- passive support for mandible
- elevation of madible is caused by
-
temporal
masseter
medial pterygoid - depression of mandible is caused by
-
gravity
suprahyoid and infrahyoid - protrusion of mandible is caused by
-
lateral pterygoid *
massester (oblique)
medial pterygoid - retraction of chin is caused by
-
temporal
masseter - lateral movement of jaw is caused by
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retractors of same side
protruders of opposite side - contents of pterygopalatine fossa
-
terminal part of maxillary a and intial part of branches
maxillary n
nerve of pterygoid canal
pterygopalatine ganglion - anterior border of pterygoplatine fossa
- infratemporal surface of maxilla
- medial border of pterygoplatine fossa
- vertical plate of palatine bone
- posterior border of pterygoplatine fossa
- pterygoid process of sphenoid
- superior border of pterygoplatine fossa
- body of sphenoid
- lateral border of pterygoplatine fossa
- opens into pterygomaxillary fissure
- 7 openings of pterygopalatine fossa
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1. pterygomaxillary fissure
2. inferior orbital fissure
3. foramen rotundum
4. pterygoid canal
5. pharyngeal canal
6. sphenopalatine foramen
7. pterygopaltine canal