RADS 331: Skull
The ______ ____ is where the pituitary gland sits and it is enlardged on an image could mean that someone has a pituitary turmor
The "sella turcica" is where the pituitary gland sits and if it is enlardged on an image it could mean that someone has a pituitary turmor
The _________ sutures separate the parietal bones from the temporal bones
The "squamosal" sutures separate the parietal bones from the temporal bones
The _________ _________ processes extend superiorly from the dorsum sellae
The anterior clinoid processes extend superiorly from the dorsum sellae
The lateral ___________ (masses) contain ethmoid air cells or or sinuses and help to form the medial walls of the orbits and the lateral walls of the nasal cavity
The lateral "labyrinths" (masses) contain ethmoid air cells or sinuses and help to form the medial walls of the orbits and the lateral walls of the nasal cavity
On which section of the temporal bone can the zygomatic processes be found?
The zygomatic processes of the temporal bone can be found on the squamous portion of the temporal bone.
____________ is a type of petrous portion with +- 54 degrees a person with this type of head would be seen as having a "fat head"
"Brachycephalic" is a type of petrous portion with +- 54 degrees a person with this type of head would be seen as having a "fat head"
_________ is a type of petrous portion with +- 40 degrees a person with this type of head would be seen as having a narrow head
"Dolicocephalic" is a type of petrous portion with +- 40 degrees a person with this type of head would be seen as having a narrow head
__________ is a type of petrous portion with +- 47 degrees a person with this type of head would be seen as having an average head
"Mesocephalic" is a type of petrous portion with +- 47 degrees a person with this type of head would be seen as having an average head
What is another name for the petrous pyramid?
Another name for the petrous pyramid is the pars petrosa
What makes up the two sections of the cranium?
Calvarium (skull cap or roof) and floor (base)
What makes up the sphenoid bone?
Dorsum sellae, clivus, greater wings, lesser wings, sella turcica, anterior clinoid processes, posterior clinoid processes, foramen rotundum, foramen ovale, foramen spinosum, medial pterygoid (pterygoid hamulus), lateral pterygoid process, chismatic optic groove, optic canal, optic foramen
True or False The major portion of the ethmoid bone lies above the floor of the cranium
False The major portion of the ethmoid bone lies beneath the floor of the cranium
What are the four bones that make up the calvarium (skull cap or roof)?
Frontal, left parietal, right parietal, and occipital
What parts make up the squamous (flat) portion of the frontal bone?
Glabella, frontal tuberosities (eminences), superciliary ridge arch), supraorbital margin (SOM), supraorbital groove, supraorbital notch (foramen)
Inferior and slightly anterior to the sella turcica is a hollow like body are a of the sphenoid termed ______ _____
Inferior and slightly anterior to the sella turcica is a hollow like body are a of the sphenoid termed "sphenoid sinus"
What parts make up the orbital or horizontal portion of the frontal bone?
Nasal (frontal) spine, ethmoid notch, orbital plate
What determines the shape of someones head?
Petrous portion
What are the three sections of the temporal bone?
Squamous portion, mastoid portion, and petrous portion
Sutures are classified as _______ joints. In adults these are immovable and are therefore classified as synarthroidal-type joints.
Sutures are classified as _______ joints. In adults these are immovable and are therefore classified as synarthroidal-type joints.
THe larger frontal bone contains a cavity directly posterior to the glabella called the _______ sinus
THe larger frontal bone contains a cavity directly posterior to the glabella called the "frontal" sinus
The ________ is the posterior surface of the dorsum sellae "Wooooo slide into occipital bone" -Patti
The "clivus" is the posterior surface of the dorsum sellae "Wooooo slide into occipital boen" -Patti
The _____ suture separates the frontal bone from the two parietal bones
The "coronal" suture separates the frontal bone from the two parietal bones
The ______ ______ is the small upper horizontal portion of the bone that contains small opening o foramina through which segmental branches of the olfactory nervces (nerves of smell) pass
The "cribiform plate" is the small upper horizontal portion of the bone that contains small opening o foramina through which segmental branches of the olfactory nervces (nerves of smell) pass
The ______ ______ projects superiorly from the cribiform plate and is dervived from "roosters comb"
The "crista galli" projects superiorly from the cribiform plate and is dervived from "roosters comb"
The ________ _______ is a chunk of bone that makes up the posterior portion of the sphenoid bone
The "dorsum sellae" is a chunk of bone that makes up the posterior portion of the sphenoid bone
The _______ (upside down Y) separates the two parietal bones from the occipital bone
The "lambdoidal" (upside down Y) separates the two parietal bones from the occipital bone
The ________ __________ or (eminences) are located on the parietal bone
The "parietal tubercles" or (eminences) are located on the parietal bone
The ______ suture separates the two parietal bones
The "sagittal" suture separates the two parietal bones
The ______ is shown as a midline structure between parts of the sphenoid and parts of the ethmoid
The "vomer" is shown as a midline structure between parts of the sphenoid and parts of the ethmoid
Which clinoid processes are larger and spread wider apart?
The anterior clinoid processes are larger and spread wider apart
The __________ ______ processes come off the lesser wing
The anterior clinoid processes come off the lesser wing
The anterior end of the sagittal suture is termed the ______ and the posterior end is termed the lambda
The anterior end of the sagittal suture is termed the "bregma" and the posterior end is termed the lambda
What parts make up the ethmoid?
The cribiform plate, crista galli, perpendicular plate, lateral labyrinth, superior nasal concha (turbinate), middle nasal concha (turbinate)
What is the densest part of the petrous portion?
The densest part of the petrous portion is the petrous pyramid
The ethmoid articulates with two cranial bones the _______ and _______ and also articulates with 11 facial bones
The ethmoid articulates with two cranial bones the "frontal"and "sphenoid" and also articulates with 11 facial bones
What makes up the biggest portion of the cap?
The left and right parietal make up the biggest portion of the skull cap
Which part of the occipital bone forms the atlanto-occipital or occipitolantal joint by articulating with C1?
The occipital condyle forms the atlanto-occipital or occipitolanta joint by articulating with C1
What parts are included in the mastoid portion of the temporal bone?
The parts that are included in the mastoid portion include the external acoustic/ auditory meatus (EAM), temporomandibular fossa, mastoid air cells, mastoid process tip, styloid process
Which part of the ethmoid helps form the bony nasal septum?
The perpendicular plate helps form the bony nasal septum
What makes up the petrous portion?
The petrous ridge, petrous pyramid, auditory organs, and organs of balance
The pterygoid hamulus can be found on the _______ pterygoid
The pterygoid hamulus can be found on the medial pterygoid
The right and left _________ are the are points posterior to the ear where the squamosal and lambdoidal sutures meet. This is the point of junction of the parietal, temporal, and occipital bones
The right and left "asterions" are the are points posterior to the ear where the squamosal and lambdoidal sutures meet. This is the point of junction of the parietal, temporal, and occipital bones
The right and left ________ are the points at the junction of the frontal, parietal, temporal and, greater wings of sphenoid
The right and left "pterions"are the points at the junction of the frontal, parietal, temporal and, greater wings of sphenoid
What are the four bones that make up the floor (base)?
The right temporal, left temporal, sphenoid, and ethmoid
What forms the occipital bone?
The squamous portion, external occipital protuberance (inion), occipital condyles, and foramen magnum
Which part of the mastoid portion can be seen on a lateral C-spine?
The styloid process can be seen on a lateral C-spine
Which portion of the temporal bone is the thinnest?
The thinnest portion of the temporal bone is the squamous portion which causes it to be the most easily fractured
True or False The "parietal eminences" located on the parietal bone mark the widest portion of the skull
True The "parietal eminences" located on the parietal bone mark the widest portion of the skull
True or False The calvarium on an infant is very large in proportion to the rest of the body but the facial bones are quite small
True The calvarium on an infant is very large in proportion to the rest of the body but the facial bones are quite small
What are the two other names for the cranium?
brain case or cranial vault
