Rad ana

• Cerebral Cranium - Part of the skull that encloses the brain. It also reffered to as the "calvarium/calvaria" or cranial vault
• Sutures - are special interlocking joints between the various bones of the cerebral cranium.
• Frontal bone - this single bone forms the forehead and part of the roof of the skull.
• SUPRA ORBITAL BORDERS - are the riges forming tje upper margins of the circular openings of the orbits.
• Glabella - it is the smooth, rounded bony prominence above the nose.
• Frontal Sinuses - are paired cavities in the squamous or forehead part of the frontal bone, ane on each side.
• Nasioon - is the middle point of the Fronto-Nasal suture.
• Supra Orbital Notch - lies towards the medial end of each supra orbital border allowing blood vessels and nerves to pass.
• Parietal Bones - these are paired bones, one on each side of the cerebral cranium.
• Parietal eminence - Is a bony prominince on the outer surface of each parietal bone which is greatest transverse diameter of the skull.
• Occipital bone - Is a single bone which forms the posterior part as well as the part of the base or floor of the cerebral cranium.
• Squamous Part - is the flat posterior part of the occipital bone.
• Foramen Magnum - Is an opening in the lower part of the occipital bone through which the medulla of the brain leaves the skull, which is formed entirely by the occipital bone.
• Lateral Parts of the occipital bone - lie on each side of the foramen magnum.
• Occipital condyles - are two oval prominences on the under surface of the lateral parts of the foramen magnum.
• Base of the occipital bone - part in front of the Foramen

  Magnum which unite with the Sphenoid bone in front andf orms part of the floor of the skull.
• External Occipital Protuberance/Inion – is the bony prominence on the outer surface of the squamous part of the occipital bone which is readily palpable.
• TEMPORAL BONES (2) - Forms part of the lateral walls and base of the skull.
• ygomatic Process – is a slender bony process

  that extends forward from the squamous part

  to meet a similar process of the Zygomatic bone

  forming the “Zygomatic Arch”
• Mastoid Process – is a large rounded bony

  prominence extending down behind the ear.
• Mastoid Air Cells – are small cavities in the

  mastoid process and adjacent part that

  communicate with the middle ear.
• Petrous Part – is shaped like a pyramid that extends from

  the ear medially and forward in the base of the skull.
• Styloid Process – is a sharp pointed process that extends

  down from the base of the petrous part which is seen in

  lateral view of the skull outlined behind the mandible.
• External Auditory Meatus – a tube-like passage extending into

  the petrous part of the temporal bone.
• Internal Auditory Meatus –

  lies in the middle or inner

  part of the petrous, medial to

  the middle ear.
• Internal Ear – lies in the petrous part and is the organ of

  hearing
• Mandibular or Articular Fossa – a depression on the

  temporal bone in front of the EAM.
• jugular Foramen – is an opening medial to the styloid

  process through which the internal jugular vein and

  cranial nerves IX, X and XI pass.
• Carotid canal – is an opening medial to the styloid

  process through which the internal carotid artery passes into the cranial cavity
• Stylomastoid foramen – is a tiny opening between the mastoid and Styloid

  processes through which cranial nerve VII leaves the cranium.
• Foramen Lacerum – is an opening between the petrous temporal bone and the

  sphenoid providing passage for a number of small nerves and for the internal

  carotid artery to enter the middle cranial fossa.
• SPHENOID BONE - A single bone that help to form a small part of the lateral wall of the skull on

  each side as well as part of the base of the skull
• Body – part of the sphenoid bone that is the central part that lies in the midline of the floor of the skull, in front

  of the occipital bone.
• Wings – extended laterally from the body. There are two pairs; the Greater wings

  and Lesser wings.
• Pterygoid Processes/Plates – extend down from the undersurface of the body.
• Sphenoid Sinuses – are two cavities within the body of the bone, one on

  each side of the midline that lie behind the nasal fossae and open into

  them.
• Optic Foramen – is an opening at the front on each side of the body of the

  sphenoid.
• Sella Turcica – is a depression

  hallowed out on the upper surface of

  the body which is shaped like a saddle

  wherein the Pituitary gland/

  Hypophysis lies in this depression.
• Dorsum Sella (Back of Saddle) - Is the posterior wall of the

  Sella Turcica where it curve upward like the back of a saddle
• Posterior Clinoid Processes – are two small rounded

  bony processes that extend up and forward from the top

  of the

  of the Dorsum Sella.Sella.

  Dorsum Sella.orsum Sella.