Anatomy: The Skull

How many bones are in the skull?

8 form the cranium, 14 are associated with the face

Zygomatic Process

Styloid Process

Mastoid Process

External Acoustic Meatus

Stylomastoid foramen

Facial nerve (CN VII) exits here

Carotid Canal

Mandibular fossa

Jugular foramen

glossophayrngeal nerve (CN IX), vagus nerve (CN X), and accessory nerve (CN XI), and internal jugular vein

Internal Acoustic Meatus

Facial nerve (CN VII), and vestibulocochlear nerve (CN VIII)

Foramen magnum

Occipital condyles

External occipital protubrance

Hypoglossal canal

hypoglossal nerve (CN XII)

Lesser wing

Greater wing

Sella turcica

Foramen lacerum

nothing goes through here

Optic canal

Optic nerve (CN II)

Foramen rotundum

Maxillary nerve (CN V2)

Foramen ovale

Mandibular nerve (CN V3)

Foramen spinosum

Middle meningeal artery

superior orbital fissure

occulomotor nerve (CN III), trochlear nerve (CN IV), ophthalmic nerve (CN V1), abducens nerve (CN VI)

lateral pterygoid plate

medial pterygoid plate

crista galli

cribiform foramina of cribiform plate

olfactory nerve (CN I)

perpindicular plate

middle nasal concha

Sutures

fibrous joints, connect interlocking edges of skull

Squamosal

coronal

sagittal

lamboidal

fontanelles

soft fibrous areas where sutures unite

alveolar processes

infra-orbital foramen

palatine processes

frontal sinus

ethmoidal sinus

maxillary sinus

horizontal plate

hard plate

formed by palatine process and horizontal plate

nasal bone

temporal process of zygomatic bone

zygomatic process of temporal bone

lacrimal bones

what bones are in the orbit?

frontal bone, zygomatic bone, maxillary bone, sphenoid bone, ethmoid bone, lacrimal bone, palatine bone

inferior nasal conchae

vomer

nasal septum

composed of the perpindicular plate of the ethmoid bone, vomer, and septal cartilage

deviated septum

when nasal septum is displaced on one side, often present at birth or can be caused from injury, symptoms include congested nostrils, nosebleeds, noisy breathing during sleep

mental foramen

angle

ramus

condylar process

coranoid process