temporal fossa Flashcards
temporal and infra temporal fossa
interconnected spaces
boundaries are bone and soft tissue
what muscles does temporal and infra temporal fossa relate to
muscles of mastication
masseter lateral to ITF
medial and lateral pterygoid in ITF
temporales fils TF
main bones involved in TF and ITF
temporal, zygomatic arch, sphenoid bones, maxilla, mandible
temporal fossa covers
lateral surface of skull
temporal fossa goes from where to where
from zygomatic process of frontal bone to surpamastoid crest of temporal bone
major structure of temporal fossa
temporalis muscle
temporalis muscle inv and blood supply
inv- deep temporal nerves from anterior trunk of mandibular nerve V3 (motor) and Zygomaticotemporal of zygomatic nerve V2 (sensory)
blood supply- deep temporal arteries and middle temporal arteries
deep temporal artery is from
maxillary artery
middle temporal artery is from
superficial temporal artery, passes under muscle and superiorly into deep surface
infratemporal fossa is _______ to temporal fossa
inferior
infra temporal fossa is positioned
between ramus of mandible laterally and wall of pharynx medially
roof of the infra temporal fossa
inferior surface of greater wing of sphenoid and temporal bone
contents of root of ITF
contains foramen spinosum, foramen ovale, petrotympanic fissure
lateral wall of ITF
medial surface of mandible
medial wall of ITF
to the anterior- lateral plate of pterygoid process and pterygomaxillary fissure (allows structures to pass from ITF to pterygopalatine fossa)
to the posterior- pharynx and 2 muscles of soft palate (tensor and elevator palatine)
major contents of ITF
sphenomandibular ligament, medial and lateral pterygoid muscles, maxillary artery, mandibular nerve V3, branches of facial nerve (VII), glossopharyngeal nerve (IX), pterygoid plexus of veins
sphenomandibular ligament
extracapsular for TMJ, from spine of sphenoid (lingual near foramen)
maxillary artery supplies
largest branch off ECA
blood supply to nasal cavity, roof and lateral wall oral cavity, dura mater, all teeth
maxillary artery branches
first part- middle meningeal, inferior alveolar
second part- deep temporal, masseteric, buccal, pterygoid branches
branches off anterior trunk of mandibular nerve
buccal- mostly sensory
massesteric- motor
deep temporal- motor
nerve to lateral pterygoid
buccal nerve sensory to
off anterior trunk, mostly sensory, some motor to lateral pterygoid
sensory to adjacent skin and oral mucosa, buccal, gingiva, lower molars, anesthesia to “long buccal” (lower posterior teeth)
buccal nerve moves through
tendon of temporalis and continues to cheek, lateral buccinator
masseteric nerve
supplies masseter muscle, passes over lateral pterygoid through mandibular notch
deep temporal nerve
supplies temporalis muscle via infra temporal crest via temporal fossa
nerve to lateral pterygoid
two possible sources- off anterior trunk or from its buccal branch
passes into deep surface of lateral pterygoid
branches off posterior trunk of mandibular nerve
all sensory, auriculotemporal, lingual, inferior alveolar
auriculotemporal nerve supplies
sensation over large area of temple, sensory external ear, auditory meatus, tympanic membrane, TMJ
has post ganglionic parasympathetic nerves for glossopharyngeal (IX) to parotid
auriculotemporal nerve enters through
foramen spinosum
lingual nerve
sensory nerve from V3
general sensation anterior 2/3 of tongue, oral mucosa floor of mouth, lingual gingiva lower teeth
lingual nerve enters
oral cavity at posterior attachment of mylohyoid and superior constrictor of pharynx
tongue on lateral surface of hyoglossus muscle
inferior to last molar, easily palpated and traumatized
inferior alveolar nerve supples
major sensory nerve in lower
one motor branch to mylohyoid and anterior digastric prior to entering canal
inferior alveolar passes
between sphenomandibular ligament and ramus of mandible and enters canal via mandibular foramen
branches of inferior alveolar nerve
incisive nerve and mental nerve
nerves prior to branches of trunk
meningeal branch via foramen spinosum- sensory to dura mater and mastoid
nerve to medial pterygoid- branches to tensor veli palatini and tensor tympani
chorda tympani
branch of facial nerve (VII), close to condyle
parasympathetic inv to salivary glands, taste anterior 2/3 tongue
sensory to tongue, related to ear and TMJ (petrotympanic fissure)
lesser petrosal
branch of glossopharyngeal nerve (IX)
parasympathetic to parotid
what two nerves join with branches of mandibular nerve V3 in the ITF
chorda tympani and lesser petrosal
pterygoid plexus of veins resides
between pterygoid muscles, lateral pterygoid, and temporalis
pterygoid plexus of veins drains
drains area associated with maxillary artery
drains nasal cavity, all teeth, oral cavity, muscles of ITF, paranasal sinuses, nasopharynx
infection can spread into pterygoid plexus of veins via
emissary veins
lack of valves in pterygoid plexus of veins may allow
anesthetic back flow into cranial cavity
mastoid process
at the base of skull
area of attachment for muscle- SCM, posterior digastric, etc.
has air cells (sinuses)
