Infratemporal fossa Flashcards
what is the infratemporal fossa
space beneath the base of the skull - between the skull and the ramus of the mandible
what foramen opens into the infratemporal fossa
foramen ovale
the foramen ovale opens into the infratemporal fossa which allows what
mandibular branch of the trigeminal nerve to exit skull
what artery passes from the infratemporal fossa into the foramen spinosum to gain entry to the skull
middle meningeal
what is the anterior boundary of the infratemporal fossa
posterior surface of maxilla
what is the posterior boundary of the infratemporal fossa
styloid process
what is the superior boundary of the infratemporal fossa
infratemporal surface of the greater wing of the sphenoid
what is the medial border of the infratemporal fossa
lateral pterygoid plate
what is the lateral border of the infratemporal fossa
ramus of the mandible
terminal branches of the maxillary artery pass through ___ to exit the infratemporal fossa
the pterygomaxillary fissure
what are the contents of the infratemporal fossa
lateral and medial pterygoid
mandibular division of the trigeminal nerve CNV3
maxillary artery and branches
pterygoid venous plexus
chorda tympani
otic ganglion
what nervous structures pass are found in the infratemporal fossa
otic ganglion
chorda tympani
mandibular division of the trigeminal nerve
what is the function of the medial pterygoid
assists in elevating the mandible
what is the function of the lateral pterygoid
pulls the neck of the mandible forward
together what do the pterygoids do
chewing movements
nerve supply of the pterygoids
mandibular division of trigeminal
what are the branches of the anterior division of the mandibular division of the trigeminal nerve
2x deep temporal
masseteric
nerve to lateral pterygoid
buccal (sensory)
what are the branches of the posterior division of the mandibular division of the trigeminal nerve
lingual (joined by chorda tympani)
inferior alveolar
mylohyoid
auricolutemporal
what branches does the the mandibular division of the trigeminal nerve give off before it divides into anterior and posterior branches
meningeal
nerve to medial pterygoid
communicating branch (tensor tympani and tensor veli palatini)
describe the course of the inferior alveolar branch of the posterior division of the mandibular division of the trigeminal nerve
supplies the lower teeth and then passes out onto face to supply cutaneous innervation to skin over mandible
what supplies cutaneous innervation to skin anterior to auricle
auriculotemporal branch
what are the largest branches formed from the mandibular division of the trigeminal nerve
inferior alveolar and lingual nerves
the maxillary artery is a terminal branch of what
ECA
the maxillary artery passes through what where it branches to form arteries that supply what
infratemporal fossa
muscles of mastication, dura, lower teeth, cheek
the maxillary artery passes between the heads of ____ to go into ______ to send branches to what
lateral pterygoid
pterygomaxillary fissure
branches to upper teeth
what forms the lingual artery
second branch of the anterior division of the external carotid artery
what are the 3 parts of the maxillary artery
mandibular
pterygoid
pterygopalatine
what are the branches of the maxillary artery
inferior alveolar
mylohyoid
deep auricular and anterior tympanic
middle meningeal
deep temporal
posterior superior alveolar
infraorbital
buccal
what branches of the maxillary artery go to the muscles
deep temporal
masseteric
pterygoid branches
what should be removed in dissection to more easily see the maxillary artery crossing the infratemporal fossa from lateral to medial
lateral pterygoid
what are the branches of the pterygopalatine part of the maxillary artery
posterior superior alveolar
infraorbital
anterior superior alveolar
palatine, pharyngeal and sphenopalatine branches
the posterior superior alveolar artery supplies
upper molar and premolar
the infraorbital artery supplies
canal in floor of orbit, foramen
the anterior superior alveolar branches supply
upper incisor and canine
what is the small connected network of veins surrounding lateral pterygoid
pterygoid venous plexus
what does the pterygoid venous plexus communicate with
cavernous sinus inside the skull and the facial vein that drains the superficial structures of the face - pathway for pathogens to meninges
what drains the pterygoid venous plexus
maxillary vein
the pterygoid venous plexus receives veins from
orbit, nasal and oral cavities
the parasympathetic secretomotor nerves that supply the submandibular and sublingual salivary glands are from
facial nerve
the main part of the facial nerve passes through the ___ foramen and ___ gland to what
stylomastoid
parotid
muscles of facial expression
what branch does the facial nerve form as it passes through the temporal bone
chorda tympani
why is the lingual branch of the mandibular division of the trigeminal nerve an ideal candidate to carry parasympathetic nerve fibres to structures in the mouth
the main part of the facial nerve passes to the muscles of facial expression and does not enter the oral cavity whereas the lingual branch of the mandibular division of the trigeminal nerve does
the chorda tympani branch crosses what in the middle ear
handle of the malleus (ossicle in middle ear)
how does chorda tympani reach the infratemporal fossa
passes through a bony canal
what does chorda tympani do in the infratemporal fossa
joins the lingual nerve
what fibres run in the chorda tympani with the lingual nerve
parasympathetic secretomotor to submandibular and sublingual salivary glands and special taste to anterior 2/3 tongue
taste of anterior 2/3 tongue
facial nerve - chorda tympani
general sensory anterior 2/3 tongue
the mandibular division of the trigeminal nerve
the otic ganglion lies at the mouth of what
foramen ovale
what passes through otic ganglion without synapsing
post-ganglionic sympathetic fibres and motor nerves to tensor tympani and tensor veli palatini (CNV3)
