Skull and Cranial Cavity Flashcards
What are the 4 projections of the temporal bone?
styloid process, mastoid process, zygomatic process, petrous part
What are the sutures of the cranial cavity?
sagittal, coronal and lambdoid
What bones is the pterion between?
temporal, parietal, frontal, sphenoid
What is the ridge in the ethmoid bone called?
crista galli
What is the gap between the greater and lesser wing of sphenoid?
superior orbital fissure
Where is the optic canal?
between the body of the sphenoid and the lesser wing
What are the 3 foramen in an arc in the middle cranial fossa?
foramen rotundum, foramen ovale, foramen spinosum
What is the foramen lacerum?
The 6th foramen in the middle cranial fossa - nothing goes through it
What goes through the foramen spinosum?
the middle meningeal artery
What are the 4 foramina in the posterior cranial cavity?
internal auditory meatus, jugular foramen and hypoglossal canal and the foramen magnum
Where is the internal auditory meatus?
in the petrous part of the temporal bone
Where is the jugular foramen?
between the petrous part of the temporal bone and the occipital bone
Where is the hypoglossal canal?
in the occipital bone
What is the emissary vein?
A vein that drains blood from the scalp to the dural sinuses
What is the diploic vein?
Drains the diploe (spongy layer) of the skull in to the dural sinuses
