Laboratory Identifications and Relations -- Infratemporal Fossa
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[ SBMP ] [ Skull ] [ Face ]
[ Cavernous Sinus ] [ Orbit ]
[ Parotid Region, TMJ, Mandible ] [ Infratemporal Fossa ]
[ Pterygopalatine Fossa ]
Boundaries - Skull Landmarks
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anterior - posterior aspect of maxilla
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posterior - styloid process
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superior - infratemporal crest
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inferior - body of mandible
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medial - pterygoid plate (pterygo maxillary fissure)
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lateral - ramus of mandible
Identifications
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Zygomatic process temporal bone - forms suture with zygoma
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Mastoid process - attachment of SCM, splenius capitus, longus capitus
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External auditory meatus
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Styloid process - site of origin for three mm having three different innervation,
stylohyoid ligament
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Petrotympanic fissure - medial to mandibular fossa, chorda tympani branch
of facial
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Lateral pterygoid plate - medial boundary of IFTF, site of attachment of
two muscles of mastication
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Maxilla - forms anterior boundary of IFTF
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Zygoma - contributes to zygomatic arch
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Hamulus of medial pterygoid plate - pulley for tendon of tensor veli palatini
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Greater wing of sphenoid bone - part of roof of IFTF, pterion, foramen
ovale, foramen spinosum
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Inferior orbital fissure - transmits infraorbital a. (IFTF) and infraorbital
n. (PTF)
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Pterygomaxillary fissure - medial wall of IFTF, communication between IFTF
and PTF
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Pterygopalatine fossa - comunicates with IFTF, orbit, nasal cavity, oral
cavity, nasopharynx, cavernous sinus (MCF), MCF
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Foramen spinosum - middle meningeal a., sphenomandibular lig, LSPN, between
MCF and IFTF
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Foramen ovale - mandibular division of trigeminal n., emissary v. (pterygoid
plexus to cavernous sinus), LSPN, between MCF and IFTF
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Sphenopalatine foramen - medial wall of PTF, between PTF and nasal cavity,
transmits terminal branches maxillary a, branchs of V2
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External carotid artery - terminating in maxillary a. and superficial temporal
a.
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Superficial temporal artery - giving off transverse facial a., anterior
to external auditory meatus, temporal fossa
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Maxillary artery - posterior to neck of mandible
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Deep auricular artery - branch off maxillary a. toward base of external
auditory meatus
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Inferior alveolar artery - branch of maxillary a., entering mandibular
f.
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Middle meningeal artery - branch of maxillary a., entering foramen spinosum,
surrounded by split of auriculotemporal n.
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Deep temporal arteries - deep to temporalis, temporal fossa, branches of
maxillary in IFTF
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Buccal artery - branch of maxillary a., crossing lateral surface of medial
pterygoid
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Posterior superior alveolar artery - entering foramen on posterior maxilla
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Infraorbital artery - branch of maxillary a., entering inferior orbital
fissure
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Artery of maxillary nerve - branch of maxillary a., through foramen rotundum
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Artery of pterygoid canal - branch of maxillary a., through pterygoid canal
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Pharyngeal artery - branch of maxillary a. through palatovaginal canal
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Greater and lesser palatine arteries - leaving floor of pterygopalatine
fossa, at hard and soft palate
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Lateral posterior nasal arteries - terminal branches of maxillary a., through
sphenopalatine foramen, superior, middle, inferior
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Mandibular nerve - at foramen ovale
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Auriculotemperal nerve - anterior to external auditory meatus
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Inferior alveolar nerve - entering IFTF from PTF, enters foramen on posterior
maxilla
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Lingual nerve - lateral surface of medial pterygoid muscle
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Buccal nerve - lateral surface of medial pterygoid muscle, piercing the
buccinator
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Chorda tympani nerve (CN VII) - petrotympanic fissure, joinning with the
lingual n., functional components
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Maxillary nerve - roof of pterygopalatine fossa
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Posterior superior alveolar nerve - entering infratemporal fossa from pterygopalatine
fossa
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Infraorbital nerve - continuation of maxillary n. into the orbit, inferior
orbital fissure, roof of PTF
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Mandibular Foramen - transmits inferior alveolar n. a., adjacent to lingula,
dental anesthesia
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Facial Nerve - entering parotid region from stylomastoid foramen
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Communicating branch - parasympathetics, leaving auriculotemporal n. to
join with branches of facial n.
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