Head Flashcards
What runs through the optic canal?
optic nerve (CNII)
ophthalmic artery
Where does the ophthalmic artery arise from?
the ICA
What does the superior orbital fissure contain?
superior ophthalmic vein
3,4,5 (V1),6 cranial nerves
What does the inferior obital fissure contain?
inf ophthalmic vein
CN V2
infraorbital a+v
Where does the nasolacrimal duct run?
Lacrimal gland at upper outer portion of orbit
duct in inner corner of eye that runs to connect to the nasal cavity where it empties in the inferior nasal meatus
what does the infraorbital foramen contain?
inferior orbital nerve (branch of V2) and artery
What bones are involved int he coronal suture?
parietal and frontal
which bones does the squamous suture involve?
parietal and temporal
which bones are involved in the lambdoid suture?
Partietal and occipital
Which bones are connected at the period?
frontal, parietal, sphenoid and temporal
Which muscle inserts on the mastoid process?
SCM
Which attaches on the zygomatic arch?
masseter (superficial)
temporalis (deep)
Describe the elements of the mandibular ramus.
Ramus is superior projection up from angle
mandibular condyle is the posterior element which allows hinging motion
coronoid process is anterior element which has temporals muscle inserting on
mandibular notch is the gap between the two processes
Where is the crista galli located?
anteriorly in the skull base near the cribriform plate
What elements make up the sela turcica?
dorsum cellae
hypophyseal fossa
posterior crinoid processes
What lies directly beneath the sela turcica?
the sphenoid sinus
Where are the optic canals within the skull base?
beneath the anterior clinoid processes in the body of the sphenoid bone
Where are the superior orbital fissures within the skull base?
in the middle cranial fossa in the greater wing of the sphenoid
What lies directly beneath the superior orbital fissure in the skull base?
Foramen rotundum
What runs through foramen oval?
V3 into the infra temporal fossa
What runs within the foramen spinous?
MMA
Where is the foramen lacerum within the skull base?
medial to the foramen ovale just lateral to posterior clinoid process/dorsum cellae
What runs in the internal acoustic meatus?
CN7+8
Where is the internal acoustic meatus in the skull base?
petrous temporal bone
Where is the jugular foramen in the skull base?
directly below the internal acoustic meatus
What travels through the jugular foramen?
Internal jugular vein
CN 9,10,11
Where is the hypoglossal canal located?
right above foramen magnum on lateral walls
What bone makes up the posterior nasal septum?
vomer
What foramina are in the hard palate?
incisive foramen anteriorly in the midline
greater palatine - bilateral near the back corners
lesser palatine - bilateral even further back
Where is the pterygoid process of the spenoid?
on the exterior base of the skull
what parts make up the pterygoid process of the sphenoid?
medial plate
hamulus
lateral plate
What structures travel through the cavernous sinus?
ICA + CN6 through body
In the wall - CN 3, 4, v1, V2
pituitary gland
Where does the 4th ventricle communicate with the subarachnoid space?
via the median aperture (of Magendie) into the cisterna magna
via one of the two lateral apertures (of Luschka) into the cerebellopontine cistern
What sits on top of master muscle?
parotid gland
Describe the path of the parotid duct.
appears out of the front of the gland
travels deep through buccinator muscle
appears near 2nd maxillary molar
What nerve travels near the parotid duct?
buccal branch of CN7
Where is the infundibulum?
middle nasal concha and opens from the front-nasal duct
what is above the superior nasal meatus?
the sphene-ethmoidal recess
Where does the Eustachian tube open into?
posterior nasal cavity before nasopharynx
What connects the lateral ventricles and 3rd ventricles?
inter ventricular foramen of Monroe (paired)
Which CNs come from the midbrain?
3,4
which CNs come from the pons?
5,6,7,8
Which CNs come form the medulla?
9,10,11,12
Which CN runs between SCA and PCA?
CN3
where does the optic chiasm sit in relation to the circle of willis and the pituitary>?
within the circle of willis
anterior to infundibulum of pituitary
superior to gland itself
what are the boundaries of the PPF?
Deep to infra temporal fossa
between pterygoid plate, palatine bone and maxilla
Where does the PPF communicate?
nasal cavity, oral cavity, infra temporal fossa, orbit, pharynx, middle cranial fossa
how does the ppl communicate with infratemporal fossa?
pterygomaxillary fissure, laterally
how does the ppl communicate with the nasal cavity?
sphenopalatine fossa, medially
how does the PPF communicate with the middle cranial fossa?
foramen rotundum
how does the PPF communicate with the pharynx?
pharyngeal canal
What are the 3 posterior communications of the PPF?
foramen rotundum
pharyngeal canal
pterygoid canal
How does the ppl communicate with the orbit?
infraorbital groove anteriorly
how does the PPF communicate with the palate?
Greater and lesser palatine canals inferiorly
