Infratemporal fossa Flashcards
what is the lateral/external boundary of the infratemporal fossa?
ramus of mandible
what is the superior boundary of the infratemporal fossa?
zygomatic arch
inferior surface of greater wing of sphenoid
what is the posterior boundary of the infratemporal fossa?
tympanic plate
mastoid process
styloid process
what is the anterior boundary of the infratemporal fossa?
posterior aspect of maxilla
what is the medial/internal boundary of the infratemporal fossa?
lateral pterygoid plate
what is the inferior boundary of the infratemporal fossa?
where the medial pterygoid muscle attaches to the mandible near its angle
what muscles are contained in the infratemporal fossa?
inferior part of temporalis
medial pterygoid
lateral pterygoid
what nerves are contained in the infratemporal fossa?
branches of CNV3
Chorda tympani CNVII
Otic ganglion CNIX
what arteries are contained in the infratemporal fossa?
maxillary arteries and its branches
what veins are contained in the infratemporal fossa?
pterygoid plexus
what is the function of the lateral pterygoid muscle?
opens jaw
what are the origins of the lateral pterygoid muscle?
infratemporal crest of greater wing of sphenoid (superior head)
lateral surface of lateral pterygoid plate (inferior head)
what are the insertions of the lateral pterygoid muscle?
manidbular pterygoid fovea
TMJ capsule and articular disc
what is the innervation to the lateral pterygoid muscle?
CNV3 nerve to lateral pterygoid
what is the function of the medial pterygoid muscle?
closes jaw
what are the origins of the medial pterygoid muscle?
medial surface of lateral pterygoid plate (deep head)
maxillary tuberosity
what are the insertions of the medial pterygoid muscle?
medial surface of mandibular ramus
what is the innervation to the medial pterygoid muscle?
CNV3 nerve to medial pterygoid
what is the pterygoid venous plexus?
lots of veins located in the infratemporal fossa
what does the pterygoid venous plexus surround?
lateral pterygoid muscle
maxillary artery
facial vein and deep facial veins drain into the ? in the pterygoid venous plexus then to the ?
maxillary vein
retromandibular vein
why is the pterygoid venous plexus clinically important?
it connects the superficial face to the dural venous sinuses through the superior and inferior ophthalmic vein and facial vein
what is the danger triangle of the face?
area where you can carry infection into the cranial cavity via the cavernous sinus
the maxillary artery is split into 3 parts that are relative to what?
lateral pterygoid muscle
where is the 1st part of the maxillary artery?
before the lateral pterygoid muscle
where is the 2nd part of the maxillary artery?
associated with the lateral pterygoid muscle
where is the 3rd part of the maxillary artery?
after the lateral pterygoid muscle
name this branch of the maxillary artery
middle meningeal artery
where does the middle meningeal artery supply?
dura mater in the cranial vault through foramen spinosum
name this branch of the maxillary artery
inferior alveolar artery
where does the inferior alveolar artery supply?
lower teeth
name this branch of the maxillary artery
deep temporal arteries
name this branch of the maxillary artery
buccal artery
where does the buccal artery supply?
cheek
name this branch of the maxillary artery
posterior superior alveolar artery
where does the posterior superior alveolar artery supply?
upper teeth
name this branch of the maxillary artery
infraorbital artery
where does the infraorbital artery supply?
upper teeth and skin of mid face
name this branch of the maxillary artery
sphenopalatine artery
where does the sphenopalatine artery supply?
nose and palate
name the branches of the 1st part of the maxillary artery?
middle meningeal
inferior alveoalar
name the branches of the 2nd part of the maxillary artery
dep temporal arteries
buccal arteries
name the branches of the 3rd part of the maxillary artery
posterior superior alveolar artery
infraorbital artery
sphenopalatine artery
the motor and sensory root of CNV3 join where?
at foramen ovale
what are the parts that CNV3 is split into?
anterior
posterior
what are the branches of the anterior division of CNV3?
buccal
muscular branch
deep temporal
name this branch of CNV3
deep temporal
name this branch of CNV3
muscular branches
name this branch of CNV3
buccal
what does the deep temporal branch of CNV3 innervate?
motor supply to temporalis
what does the buccal branch of CNV3 innervate?
sensory supply to the mucosa and skin of cheek
what does the muscular branch of CNV3 supply?
motor supply to the masseter and lateral pterygoid
what are the nerves in the posterior division of CNV3
auriculotemporal nerve
inferior alveolar nerve
lingual nerve
name 2 branches of the inferior alveolar nerve
nerve to mylohyoid
mental nerve
name this branch of CNV3
auriculotemporal nerve
name this branch of CNV3
nerve to mylohyoid
name this branch of CNV3
inferior alveolar nerve
name this branch of CNV3
lingual nerve
what does auriculotemporal branch of CNV3 supply?
sensory supply to the tragus and temple
what does inferior alveolar nerve of CNV3 supply?
sensory supply to lower dental arch and mandibular labial gingiva
what does the nerve to mylohyoid of CNV3 supply?
motor supply to mylohyoid and anterior belly of digastric
what does the mental nerve of CNV3 supply?
sensory supply to chin, lower lip mucosa, gingiva of lower 3-3
what does the lingual nerve of CNV3 supply?
sensory supply to
anterior 2/3 tongue
floor of mouth
mandibular lingual gingiva
describe the innervation of the parotid gland?
CNIX sends parasympathetic fibres to otic ganglion
synapses
hitches a ride with auriculotemporal branch of CNV3
to parotid gland
describe the innervation to the tongue, submandibular and sublingual glands
CNVII
chorda tympani branches off
hitches a ride with lingual nerve of CNV3
why is chorda tympani special?
- Parasympathetic to submandibular and sublingual glands
- Special sensory (taste) from anterior 2/3 tongue and floor of the mouth
what innervates the lower posterior teeth?
dental branches of inferior alveolar nerve
what innervates the lower anterior teeth?
incisive branch of inferior alveolar nerve
what innervates the lower posterior buccal gingiva
buccal branch of CNV3
what innervates the lower anterior buccal/labial, gingiva?
mental branch of inferior alveolar nerve
what innervates the lingual gingiva?
lingual nerve
what innervates here?
buccal branch of CNV3
what innervates here?
mental branch of inferior alveolar nerve CNV3
what innervates here?
lingual nerve
what innervates here?
incisive branch of inferior alveolar nerve
what innervates here?
dental branches of inferior alveolar nerve