Axial Skeleton Flashcards
frontal bone
forehead
supra orbital foramen
the hole above each eye, allows nerve to pass through the forehead
parietal bones
2 of them on each side that form the superior and lateral skull.
occipital bone
forms skulls posterior wall and base
foramen magnum
in the base of the occipital bone; where the inferior part of the brain connects with the spinal cord. translates to large hole
occipital condyles
rockerlike and articulate with the first vertebra of the spinal column in a way that allows us to say “yes”
temporal bones
are inferior to the parietal bones and meet at the squamous sutures.
external auditory meatus or canal
external ear canal where sound enters the ear
zygomatic process
barlike, and meets the zygomatic bone of the face anteriorly.
mandibular fossa
oval shape where the zygomatic process receives the condylar process of the mandible
styloid process
needle like, attachment point for several tongue and neck muscles and ligament for the hyoid bone of the neck to the skull
mastoid process
acts as an anchoring site for some neck muscles. it is the lump just posterior to the ear
sphenoid bone
bat shaped bone that spans the width of the middle cranial fossa.
lesser wing
hornlike an dorm part of the floor of the anterior cranial fossa and part of the medial walls of the orbits
greater wing
project laterally from the sphenoid body forming parts of 1) the middle cranial fossa and 2) posterior walls of the orbits # the external wall of the skull and are medial to the zygomatic arch
sella turcica
forms a snug enclosure for the pituitary gland
ethmoid bone
lies between the sphenoid and nasal bones of the face and is the most deeply situated bone of the skull. forms the bony area between the nasal cavity and orbits
crista galli
“roosters comb” the outermost covering of the brain attaches to this an helps secure the brain in the cranial cavity.
cribriform plate
superiorly to the ethmoid; 2 plates that form the roof of the nasal cavity and the floor of the anterior cranial fossa. they have holes that allow for smell receptors to carry scents to the brain
superior nasal conchae
Concha shell shaped features extending horizontally along the lateral walls of the nasal cavity.
coronal sutures
where the parietal bones meet the frontal bone anteriorly
sagittal sutures
where the parietal bones meet superiorly at the cranial midline
squamosal suture
where a parietal and temporal bone meet on the lateral aspect of the skull
lamboidal sutures
where the parietal bones meet the occipital bone posteriorly
anterior fossa
supports the frontal lobes of the brain. it is the interior of the frontal bone
middle fossa
cavity median to the parietal bones
posterior fossa
internal side of the occipital bone which supports the cerebellum of the brain
nasal bones
fused medially forming the bridge of the nose
lacrimal bones
contribute to the medial walls of each orbit. they articulate with the frontal bone superiorly, the ethmoid bone posteriorly and the maxillae anteriorly. it contains a deep groove that forms a lacrimal fossa
zygomatic bones
cheekbones
maxillary bones
fused medially and form the upper jaw and central portion of the facial skeleton. considered the keystone bone of the facial skeleton
infraorbital foramens
allows the infraorbital nerve and artery to reach the face. they are below the orbit
palatine processes
form the anterior two thirds of the hard palate or roof of mouth (closest to the teeth)
palatine bones
the other third of the hard palate, it is closest to the back of the mouth
