Base of skull

The base of skull, also known as the cranial base or the cranial floor, is the most inferior area of the skull. It is composed of the endocranium and the lower parts of the calvaria.

Structure
Structures found at the base of the skull are for example:

Bones
There are five bones that make up the base of the skull:
 * Ethmoid bone
 * Sphenoid bone
 * Occipital bone
 * Frontal bone
 * Temporal bone



Sinuses

 * Occipital sinus
 * Superior sagittal sinus
 * Superior petrosal sinus

Foramina of the skull

 * Foramen cecum
 * Optic foramen
 * Foramen lacerum
 * Foramen rotundum
 * Foramen magnum
 * Foramen ovale
 * Jugular foramen
 * Internal auditory meatus
 * Mastoid foramen
 * Sphenoidal emissary foramen
 * Foramen spinosum



Sutures

 * Frontoethmoidal suture
 * Sphenofrontal suture
 * Sphenopetrosal suture
 * Sphenoethmoidal suture
 * Petrosquamous suture
 * Sphenosquamosal suture

Other

 * Sphenoidal lingula
 * Subarcuate fossa
 * Dorsum sellae
 * Jugular process
 * Petro-occipital fissure
 * Condylar canal
 * Jugular tubercle
 * Tuberculum sellae
 * Carotid groove
 * Fossa hypophyseos
 * Posterior clinoid processes
 * Sigmoid sulcus
 * Internal occipital protuberance
 * Internal occipital crest
 * Ethmoidal spine
 * Vestibular aqueduct
 * Chiasmatic groove
 * Middle clinoid process
 * Groove for sigmoid sinus
 * Trigeminal ganglion
 * Middle cranial fossa
 * Anterior cranial fossa
 * Middle meningeal artery
 * Cribriform plate
 * Posterior cranial fossa
 * Nasociliary nerve
 * Hypoglossal canal