Brain Skull Parts Flashcards
What is the hypophyseal fossa?
The depression where the pituitary sits in the skull.
What is a fossa? (Bone)
A depression in bone.
What is the larger bone structure that the “sella turcica” or Turkish saddle is a part of?
The middle cranial fossa.
How many bones make up the base of the skull?
6
Through where is the pituitary accessible without breaking through the skull?
The nose or nasal cavity.
What is a foramen? (Bone)
A hole in a bone.
What is the optic foramen?
The opening in the skull to the optic canal where the optic nerve enters the skull.
What is the falx cerebri?
A sheet of dura matter that divides the two hemispheres of the brain down the corpus callosum.
Where is the ethmoid bone?
A ridge at the front to the skull.
What does the crista galli (crest of the rooster) attach to?
The crista galli is the attachment point for the falx cerebri.
What is the cribiform plate?
The part of the skull through which the olfactory nerves poke through.
Why are some drugs inhaled through the nose?
The nose is one place where there is no blood brain barrier, so molecules can cross into the brain quickly and easily.
What structure produces cerebral spinal fluid and where is/are it located?
The choroid plexus in the lateral, their and fourth ventricles.
What is the blood brain barrier?
A membrane formed by tight junctions around all the capillaries in the brain, restricting movement of certain molecules from the brain to the blood and vise versa.
What are some molecules that can cross the blood brain barrier easily or are actively transported?
Difffuse:
O2, CO2, steroid hormones
Transported:
Glucose
