Bony landmarks and their contents Flashcards
What runs through the optic canal?
optic n.
opthalamic a.
What runs through the superior orbital fissure?
CN: III, IV, VI
V1 branches: lacrimal, frontal, nasociliary n.
superior ophthalmic v
inferior ophthalmic v
The nasopalatine n. runs through what foramen?
incisive
What runs through the inferior orbital fissure?
zygomatic n. infraorbital n (V2) orbital branch of pterygopalatine ganglion inferior ophthalmic v. infraorbital a & v
What runs through the foramen ovale?
accessory meningeal a
mandibular n (V3)
lesser petrosal n
What runs through the foramen spinosum?
MMA
meningeal branch of V3
What runs through the foramen lacerum?
ICA
a. & n. of pterygoid canal
What cavities does the facial n. run through?
internal acoustic meatus
stylomastoid foramen
The inferior petrosal sinus and sigmoid sinus run through what foramen?
jugular foramen
The foramen magnum houses what structures?
ant/post spinal a.
vertebral a
medulla oblongata
What structure does the chords tympani run through?
petrotympanic fissure
What does the infra temporal fossa communicate with?
Foramen ovale
Foramen spinosum
Pterygomaxillary fissure
IOF
What does the pterygopalatine fossa communicate with?
sphenopalatine foramen (to nasal cavity) IOF F. rotundum Pterygoid canal Pharyngeal canal (nasopharynx) Palatine canal Pterygomaxillary fissure
Structures in the cavernous sinus
inf/sup ophthalamic v inf/sup petrosal pterygoid plexus CN III, IV, V1, V2, VI ICA
What bones make up the orbit?
frontal maxilla zygoma ethmoid sphenoid lacrimal palatine
Location/Opening: sphenoethmoidal recess
Location: sup. to sup. conchae
Opening: sphenoid sinus
Location/Opening: superior meatus
Location: below sup. conchae
Opening: post ethmoid air cells
Location/Opening: middle meatus
Location: below middle conchae
Opening: frontal sinus, maxillary sinus, ant. ethmoid air cells
Structure: ethmoid bulla, hiatus semilunares, infundibulum
Location/Opening: inferior meatus
Location: below inf. conchae
Opening: nasolacrimal duct
Frontal paranasal sinus
n: V1
a: opthalamic
drainage: middle meatus, hiatus semilunaris
Ethmoid paranasal sinus
n: V1
a: opthalamic
drainage:
ant = middle meatus
middle = ethmoidal bullae
post = superior meatus
Sphenoidal paranasal sinus
n: V1, V2
a: ICA
drainage: sphenoethmoidal recess
Maxillary paranasal sinus
n: V2
a: maxillary (PSA, MSA, ASA)
drainage: middle meatus, ostium
What does the carotid sheath contain?
CCA
IJV
CN X
Deep cervical nodes
What sinus drains directly into the IJV?
Sigmoid
