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20 Cards in this Set

  • Front
  • Back
Occipital bone
forms the posterior part and most of the base of the cranium
Foramen magnum
medulla oblongata connects with the spinal cord
spinal arteries also pass through the foramen
Occipital condyles
oval processes with convex surfaces, one on either side of the foramen magnum
Articulate with depressions on the atlas of cervical vertabrae
External occipital protuberance
a promininent midline projection on the posterior surface of the bone just superior to the foramen magnum
Sphenoidal bone
lies at the middle part of the base of the skull
"keystone" of the cranial floor
articulates with all other cranial bone, holding them together
lies posterior and slightly superior to the nasal cavity and forms part of the floor, sidewalls, and rear wall of the orbit
contains the sphenoidal sinuses
cube-like medial portion btwn. the ethmoid and occipital bones
Sphenoidal sinus
drains into the nasal cavity
Sella turcica
a bony saddle-shaped structure on the superior surface of the body of the sphenoid
tuberculum sallae
anterior in the sella turcica
forms the horn of the saddle
hypophyseal fossa
contains pituitary gland
seat of saddle is depression
dorsum sallae
posterior of sella turcica
back of saddle
Another ridge
Greater wings
a broad curved winglike expanse on each side of the sphenoid bone
Lesser wings
smaller than greater wings
form a ridge of bone anterior and superior to the greater.
floor of cranium
post. orbit of eye
Optic Foramen
eye hole where the arteries and nerves of the eye pass
superior orbital fissure
btwn greater and lesser wings is a somewhat triangular slit
Pterygoid processes
project inferiorly from the pints where the body greater wings unite and form the lateral posterior region of the nasal cavity.
muscles of mandible attach here
Foramen ovale
and opening for the mandibular branch of the trigeminal nerve
Foramen Spinosum
resembling a spine
posterior angle of the sphenoid and trasmits the middle meningeal blood vessels
Foramen lacerum
bounded anteriorly by the sphenoid bone and medially by the sphenoid and occipital bones
transmits a pharyngeal artery
Foramen rotundum
located at junction anterior and medial in sphenoid bone
maxillary branch of the trigeminal nerve