4.01 - intro to skull and cranium

/how many bones encompass the adult skull/cranium?

22 bones (not including ear ossicles/bones of inner ear)

what are the two parts of the cranium? what is each made of?

what structures make up the calvaria? how does it change as we age?

name the sutures of the neurocranium

• frontal/coronal 

• sagittal 

• bregma

• lamboid

• lamba

• squamosal

• pterion

describe the frontal/coronal, sagittal and bregma sutures

describe the labdoid, and lambda sutures

describe the squamosal and pterion sutures

what is the neurocranium floor? what does it house?

what are the 3 cranial fossae? what is their role? what bones are they made of?

describe the frontal bone: where is it? what is its important feature?

describe the partietal bone: where is it? is it paired? what is its important feature?

describe the temporal bone: where is it? is it paired? what is its important feature?

what are the external features of the temporal bone?

what are the internal features of the temporal bone?

which foramen in the temporal bone can only be seen externally?

describe the occipital bone: where is it? is it paired? what are its important features?

describe the sphenoid bone: where is it? is it paired? why is it called the keystone of the skull?

what are the parts of the sphenoid bone? whate are the formamen?

in what view is the foramen rotundum not visible?

• inferior/posterior

describe the ethmoid bone bone: where is it? is it paired? what does it participate in?

how do the foramina relate to the cranial nerves?

name the foramina of the basicranium

name the foramina of the orbit

olfactory foramen

• bone

• anatomy/location

optic foramen (aka optic canal)

• bone

• anatomy/location

• sphenoid bone

• between lesser wing and sphenoid body

foramen rotundum

• bone

• anatomy/location

foramen ovale

• bone

• anatomy/location

foramen spinosum 

• bone

• anatomy/location

superior orbital fissure

• bone

• anatomy/location

formaen lacerum

• bone

• anatomy/location

carotid canal

• bone

• anatomy/location

• contents

hypoglossal canal

• bone

• anatomy/location

internal auditory meatus

• bone

• anatomy/location

external auditory meatus

• bone

• anatomy/location

stylomastoid foramen

• bone

• anatomy/location

jugular foramen

• bone

• anatomy/location

• contents

foramen magnum

• bone

• anatomy/location

• contents

how many bones of the facial skeleton are there?

describe the nasal bones

describe the lacriminal bones

describe zygomatic bone

describe the maxilla

describe the mandible

what are its landmarks?