Flashcards in Brainstem, Cerebellum, and Brain Deck (15):
What protects the central nervous system
cranial bones, cranial meninges, and cerebrospinal fluid
The 3 layers that make up the cranial meninges are the same the make up the spinal meninges, what are they?
dura mater, arachnoid mater, pia mater
Where is the subarachnoid space located
between the arachnoid and pia
What are dural sinuses
are large veins in dural folds that collect venous blood from the brain and drain into the internal jugular vein to return blood to the heart.
The dura mater also includes 3 folds the stabilize and support the brain, what are they called?
falx cerebri, falx cerebelli, and tentorium cerebelli
What are ventricles filled with
cerebral spinal fluid
What interconnects lateral ventricles and the 3rd ventricle
What interconnects 3rd and 4th ventricles
In the 4th ventricle, what allows CSF to pass from ventricles(inside brain) to subarachnoid space(outside brain)
What does cerebrospinal fluid do
bathes the entire exposed surfaces of the CNS and circulates from the ventricles into the subarachnoid space.
What is cerebrospinal fluid produced by
choroid plexus, a specialized epithelium in brain ventricles that produces CSF from extravascular fluid in the CNS
Where does CSF circulate
it circulates from ventricular space into subarachnoid space
How does CSF return from subarachnoid space
From subarachnoid space it is returned to venous circulation through arachnoid granulations found in dural venous sinuses
The brainstem is defined by what
the central trunk of the brain, which consists of the medulla, pons and midbrain. It continues caudally to form the spinal cord.