skull Flashcards
where are the superior and inferior fissures
sphenoid bone
what passes through the foramen ovale
mandibular nerve, accessory meningeal artery, lesser petrosal nerve
what passes through the foramen spinosum
middle menigeal artery and vein, menigeal branch of mandibular nerve
what passes through foramen cecum
the emissary vein from the nose to the superior sagittal sinus.
what passes through the optic canal
optic nerve (CII), ophthalmic artery
what passes through the superior orbital fissure
oculomotor nerve (CN III), trochlear nerve (CN IV), and abducens nerve (CN VI)
ophthalmic veins and nerve
what passes through the inferior orbital fissure
Infraorbital nerve, artery and vein. Inferior ophthalmic vein. Zygomatic nerve
what is a emissary vein
The emissary veins connect the extracranial venous system with the intracranial venous sinuses.
where is the incisive foramen
midline of the hard palate
where is the cribiform plate and crista galli
ethmoid bone
what passes through cribiform plate
olfactory nerves
what is the pterygoid process
downward part behind maxilla - includes lateral and medial pterygoid plates
where is foramen cecum
ethmoid bone
which bone is hypoglossal canal in
occipital
What nerve goes through hypoglossal canal
hypoglossal nerve (CXII)
What goes through the foramen magnum
medulla oblongata, meninges, vertebral arteries, spinal roots for accessory nerves
what muscle is attached to mastoid process
sternocleidomastoid
what bone is the mastoid process in
temporal bone
where is the internal auditory meatus
temporal bone ( above jugular foramen
what goes through the internal auditory meatus
vestibulocochler nerve and facial nerves
Function of occipital condyles
articulate with the atlas vertebra to form the atlanta-occipital joints
what is attached to the styloid process
stylohyoid and styloglossus muscles
where is the styloid process
temporal bone
what is the functions of the hypoglossal nerve
Draws hyoid bone up and forward
Movement of tongue
Depresses mandible
what goes through the condylar canal
emissary vein
what goes through the mastoid foramen
emissary vein and the posterior meningeal artery
where is the condylar canal
occipital bone
what goes through the stylomastoid foramen
facial nerve
where is the carotid canal
temporal bone
where is the foramen spinosum
sphenoid bone
what passes through the carotid canal
internal carotid artery
where is the jugular foramen
temporal bone
what passes through the jugular foramen
vagus nerve (X), Accessory nerve (XI), glossopharyneal nerve (IX), sigmoid sinus
what goes through the foramen lacerum
the greater petrosal nerve, the deep petrosal nerve
function of Petrotympanic fissure
communications of cranial nerves VII and IX to the infratemporal fossa.
where is optic canal
sphenoid bone
function of incisive foramen
carries the sphenopalatine artery and the nasopalatine nerve from the nasal cavity through the bony palate via the incisive canal
what is in temporal fossa
large temporalis muscle
what passes through the foramen rotundum
maxillary nerve
what is in infratemporal fossa
pterygoid muscles and coronoid process
where is the foramen rotundum
sphenoid bone
where is the foramen ovale
sphenoid bone
what passes through the mandibular foramen
The inferior alveolar artery
what passes through the mental foramen
the mental nerve, artery and vein
what bones make up the calvaria
frontal, parietal and occipital
when does Lambdoid sucture fuse
60 yrs old
what suture is between occipital and parietal bone
lambdoid
the coronal suture splits what bones
frontal and parietal
where is sagittal suture
middle of parietal
what suture splits temporal and parietal bone
squamous
name four fontanelles and when they close
Anterior fontanelle; closes 8-15 months
Posterior fontanelle: closes 3-4 months
Mastoid fontaneel: closes about 1 year
Sphenoid fontanelle: closes 3 months
what is a linear fracture
break that does not move bone - good recovery
what is a basiliar fracture
break in back of skull - most serious
what is a depressed fracture
part of skull sunken in - needs surgical intervention
what is a Diastatic fracture
a split in suture lines
what passes through the foramen rotundum
Maxillary division of the trigeminal nerve (CN V2)
what bone is the clivus in
sphenoid bone
The pterygoid process of what bone forms the posterior wall of the pterygopalatine fossa
sphenoid bone
how many unpaired bones are in the cranium
4 - occipital, frontal, ethmoid and sphenoid bones.
how many unpaired bones are in the face
2
what are the two unpaired facial bones
vomer and mandible
how many nerves go through the internal acoustic meatus
2
The supraorbital foramen of the skull provides an exit from the orbit for what
continuation of the ophthalmic nerves fibres
what opening does a branch of the maxillary artery go through to reach inside the nasopharynx
sphenopalatine foramen
what veins form a plexus in the spongy bone of the skull
diplioc veins
