Anatomy infratemporal fossa Flashcards
the infratemporal fossa is distinguished by its specific boundaries
which boundary is represented by the ramus of the mandible
lateral boundary of the infratemporal fossa
the infratemporal fossa is distinguished by its specific boundaries
which boundary is represented by the zygomatic arch
superior boundary of the infratemporal fossa
the infratemporal fossa is distinguished by its specific boundaries
which boundary is represented by the tympanic plate and mastoid process
posterior boundary of the infratemporal fossa
the infratemporal fossa is distinguished by its specific boundaries
which boundary is represented by the posterior aspect of the maxilla
anterior boundary of the temporal fossa
the infratemporal fossa is distinguished by its specific boundaries
which boundary is represented by the lateral pterygoid plate
medial boundary of the temporal fossa
what is the function of the lateralpterygoid
to open the jaw
the lateral pterygoid has a superior and inferior head
what are the origins for their respected head
infratemporal crest of greater wing of sphenoid (superior head)
lateral surface of lateral pterygoid plate (inferior head)
the lateral pterygoid has a superior and inferior head
what does the lateral pterygoid insert
TMJ capsule and articular disc
mandibular (pterygoid) fovea
what nerve innervates the lateral pterygoid
CN V3 (mixed branch of motor and sensory)
what is the function of the medial pterygoid
close jaw
the medial pterygoid has two heads, deep and superficial.
where do both heads originate
medial surface of lateral pterygoid plate (deep head).
Tuberosity of maxilla (superficial head)
where is the insertion point located for the medial pterygoid
medial surface of the mandibular ramus
what is the functionof the pterygoid venous plexus
is a collection of small tributaries which drain in to maxillary vein.
the maxillary artery is divided in to three sections what are they
green - 1st part before the lateral pterygoid
yellow - 2nd part is associated with lateral pterygoid
blue - 3rd part after lateral pterygoid
where is the inferior alveolar artery located
where is the middle meningeal artery located
where is the buccal artery located
where is the deep temporal arteries located
where is the posterior superior alveolar artery located
where is the infra-orbital artery located
wher is the sphenopalatine artery located
why does the mandibular nerve exists as two seperate roots
mandibular nerve has motor and sensory functions.
the mandibular nerve is divided into two divisions
anterior and posterior
what are the nerve branches for the anterior divsion
deep temporal
buccal
muscular branches (masseter and lateral pterygoid)
the mandibular nerve is divided into two divisions
anterior and posterior
what are the branches of the posterior division
auriculotemporal nerve
inferior alveolar nerve
nerve to mylohyoid
mental nerve
lingual nerve
wher is the otic ganglion located
The Otic ganglion is a small parasympathetic ganglion located immediately below the foramen ovale in the infratemporal fossa and on the medial surface of the mandibular nerve.
what is the function of the otic ganglion
It is functionally associated with the glossopharyngeal nerve and innervates the parotid gland for salivation
how does the otic ganglion enable the relase of saliva
the otic ganglion send postsynaptic fibres to the auriculotemporal nerve, which conveys them to the parotid gland. They produce vasodilator and secretomotor effects.
the chorda tympani is part of which cranial nerve
facial nerve
when does the chorda tympani branch off
after it passes through the stylomastoid foramen
what nerve fibres does the chroda tympani carry
special sensory and parasympathetic
after the chroda tympani branches off what nerve does it conect to
the lingual nerve of the CN V3
what do the speacial sensory fibres of the chroda tympani innervate
anterior 2/3rd of the tongue and palate for sense taste
what do the parasympathetic nerve fibres of the chorda tympani innervate
they innervate the secretomotor innervation of the submandibular and sublingual salivary gland
which nerve needs to be blocked to achieve anaesthesia on the buccal surface/skin/mucosa
buccal branch
which nerve needs to be blocked to achieve anaesthesia on the anterior mucosa
mental branch
which nerve needs to be blocked to achieve anaesthesia on the anterior teeth
incisive branch of inferior alveolar
which nerve needs to be blocked to achieve anaesthesia on the posterior teeth
dental branches of inferior alveolar
