01Superior — crista galli, opened frontal sinus, superior orbital fissure, optic canal, sella turcica
02Superior — anterior clinoid process, tuberculum and dorsum sellae
03Superior — foramina spinosum, rotundum, ovale, lacerum, jugulare
04Superior — sigmoid sinus groove, carotid canal, internal acoustic canal
05Superior — tegmen tympani, cochlear aqueduct, tensor tympani entry
06Superior — hypoglossal canal, foramen magnum
07Anterior — vomer and ethmoid septum, inferior and middle conchae
08Anterior — piriform aperture, maxillary and ethmoid sinuses
09Anterior — superior and inferior orbital fissures, optic canal
10Anterior — infraorbital foramen, lacrimal sac fossa, nasolacrimal duct
11Inferior — stylomastoid foramen, mastoid tip, styloid process
12Inferior — TMJ site, inferior orbital fissure, occipital condyles, choanae
