Temporal and Infratemporal Region Flashcards
what is the superior and posterior borders of the temporal fossa
superior and inferior temporal lines
what is the anterior border of the temporal fossa
frontal process of zygomatic bone and zygomatic process of frontal bone
what is the inferior border of the temporal fossa
infratemporal crest deep to zygomatic arch
what is the floor of the temporal fossa
frontal, parietal, temporal and greater wing of sphenoid - aka PTERION
describe the infratemporal fossa
an irregularly shaped space deep and inferior to zygomatic arch
what is the lateral border of the infratemporal fossa
ramus of the mandible
what is the medial border of the infratemporal fossa
lateral pterygoid plate of sphenoid bone
what is the anterior border of the infratemporal fossa
posterior aspect of maxilla
what is the posterior border of the infratemporal fossa
tympanic plate, mastoid and styloid process
what is the superior border of the infratemporal fossa
infratemporal crest of sphenoid bone
what is the inferior border of the infratemporal fossa
angle of the mandible
what muscles are found in the infratemporal fossa
inferior part of temporal muscle, and the lateral and medial pterygoids
what blood vessels can be found in the infratemporal fossa
maxillary artery and pterygoid venous plexus
what nerves can be found in the infratemporal fossa
mandibular, inferior alveolar, lingual, buccal and chorda typani nerves as well as otic ganglion
what muscles does the maxillary artery pass between
the medial and lateral pterygoids
what is the pterygomandibular space
part of the infratemporal fossa between the medial pterygoid and the mandible
what is the pterygomandibular space filled with
fat and pterygoid venous plexus
what is the clinical relevance of the pterygomandibular space to dentistry
when doing an IDB we aspirate to chack we’ve not hit any veins in the pterygoid venous plexus or the maxillary artery which is housed in here
what is posterior to the pterygomandibular space clinically that is relevant to dentistry
the parotid gland, if the needle goes through this space and hits the parotid it can cause facial palsy
where does the chorda tympani lie in relation to the maxillary artery
lies deep to the maxillary artery
what is the otic ganglion
one of the para-sympathetic ganglia of the head and neck where presynaptic parasympathetic fibres of CN IX synapse
presynaptic parasympathetic fibres of which cranial nerve synapse in the otic ganglion
CN IX
where does the mandibular nerve arise from
the trigeminal ganglion in the middle cranial fossa
where does the mandibular nerve exit
the foramen ovale
what are the branches of the mandibular nerve
auriculotemproal nerve
inferior alveolar
lingual nerve
buccal nerve
what gland receives secretomotor parasympathetic fibres from the auriculotemporal nerve
parotid gland
what nerve encircles the middle meningeal artery
the auriculotemporal nerve
what supplies sensory fibres to the TMJ
the auriculotemporal nerve
what is the course of the IAN
enters the mandibular foramen and passes through mandibular canal, forming an inferior dental plexus to supply mandibular teeth
what does the mental nerve supply
mental nerve passes through mental foramen and supplies skin of lower lip, chin and gingiva of mandibular incisors
how does the lingual nerve lie in respect to the IAN
lies anterior to the IAN
what does the lingual nerve supply
sensory innervation to anterior 2/3rds of tongue, floor of mouth and lingual gingivae
where does the lingual nerve enter the mouth
between the medial pterygoid muscle and ramus of the mandible
what are the three mains part of the maxillary artery
mandibular
pterygoid
pterygopalatine
what is the larger terminal branch of the external carotid artery
maxillary artery
what branch of the maxillary artery does the inferior alveolar artery and middle meningeal artery come from
mandibular branch
what main branches arise from the pterygoid branch of the maxillary artery
masseteric artery
buccal artery
what main branches arise from the pterygopalatine branch of maxillary artery
posterior superior alveolar artery
infra orbital artery
descending palatine artery
where is the pterygoid venous plexus located
partly between the temporalis and pterygoid muscles
what does the pterygoid venous plexus anastomose with
the facial vein via the deep facial vein and the cavernous sinus via emissary veins
what is in the pterygoid venous plexus
most of the veins that accompany maxillary artery
