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The smooth area between the eyebrows just above the nose

supraorbital groove

Corresponds to the highest level of the facial bones


Forms the roof and walls of the cranium.

supraorbital margin

Superior borders of each orbit

supraorbital notch

opening above each orbit allowing blood vessels and nerves to pass

frontal tuberosity

two round unmargined prominences at the upper part of the forehead

ethmoid notch

Midline gap between orbital plates


each parietal bone articulates with how many bones


the frontal bone articulates with how many bones


each temporal bone articulates with how many bones


the ethmoid articulates with how many cranial bones


the sphenoid bone articulates with how many cranial bones


the occipital bone articulates with how many bones

parietal tubercles

The widest part of the skull is found between these eminences

occipital bone

forms the inferoposterior portion of the skullcap


external protuberance on the occipital bone

foramen magnum

the large opening at the base of the cranium through which the spinal cord passes

occipital condyles

rounded projections lateral to the foramen magnum that articulate with the first cervical vertebra

atlantooccipital joint

articulation between the atlas and the occipital bone of the skull

temporal bones

cranial bones that house the organs for hearing and balance

zygomatic arch

cheekbones are made from this bony structure


external end of ear canal


process of the temporal bone behind the ear at the base of the skull

petrous pyramid

the hard dense bony process of temporal bone that houses middle ear structures


external landmark that corresponds to the level of the petrous ridge.


this cranial bone forms the anchor for the skull

sella turcica

houses the pituitary gland (hypophysis cerebri)


forms a base of support for the pons

anterior clinoid processes

the processes that extend from the lesser wings

optic groove

A transverse groove that crosses the front of the sella turcica

pterygoid hamuli

hooklike process on the inferior medial plates of the sphenoid bone.

dorsum sellae

The posterior wall of the sella turcica, a large ridge of bone projecting upward and forward.

cribriform plate

the horizontal plate of the ethmoid bone separating the cranial cavity from the nasal cavity.

crista galli

superior projection in the middle of the cribriform plate of the ethmoid bone

perpendicular plate

inferior projection of the ethmoid that forms the superior part of the nasal septum

superior and middle nasal conchae

also known as turbinates

frontal sinus

large cavity in frontal bone


another name for the articulations of the cranial bones


the sutures are this type of joint


intersection of coronal and sagittal sutures


the junction of the sagittal and lamboid sutures of the skull


junction of frontal, parietal, temporal, and greater wing sphenoid bones


Where the lambdoid, parieto-mastiod, and occipito-mastoid sutures meet.


Gaps between a baby's skull that slowly close up during the first 18 months of life

mastoid fontanel

Major connective fibrous tissue present at birth, where the squamous and lambdoid sutures meet

sphenoid fontanel

Major connective fibrous tissue present at birth, where the squamous and coronal sutures meet

anterior fontanel

Major connective fibrous tissue present at birth, where the sagittal and coronal sutures meet

posterior fontanel

Major connective fibrous tissue present at birth, where the sagittal and lamdoidal sutures meet

wormian bones

tiny irregularly shaped bones that appear within sutures

lateral labyrinth

the mass of bone that contains the nasal concha

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