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26 Cards in this Set

  • Front
  • Back
What are the two layers of the dura mater?
endosteal and meningeal layer
Endosteal and meningeal layers are closely united except along certain lines, where they seperate to form:
venous sinuses
The _______ layer is the dura mater proper.
The meningeal/dura mater ends on the _________ at the level of the S2 as it surrounds the_____ ______.
filum terminale, cauda equina
A sickle-shaped fold of dura mater that lies in midline between cerebral hemispheres.
Falx cerebri
The narrow anterior end of the falx cerebria is attached to the _______ ________ of the ethmoid bone.
Crista galli
A crescent-shaped fold of dura mater that roofs over the posterior cranial fossa: It covers upper surface of cerebellum and supports occipital lobes.
tentorium cerebrii
Dural nerve supply:
branches of trigeminal V, vagus X, and C1,C2,C3 and from sympathetic trunk
Most common artery damaged in the dura mater:
middle meningeal artery which enters through foramen spinosum
This often results from injuries to the meningeal arteries:
epidural hemorrhage
Venous sinuses of cranial cavity are situated between layers of the dura mater and main function is to receive blood from brain through cerebral veins and drain into:
internal jugular veins
Can result from tearing of the cerebral veins at their point of entrance into dural sinuses:
subdural hemorrhage
Where does the subarachnoid space end?
near S2/S3
The lateral ventricles communicate through the _______ _______ to the third ventricle.
intraventricular foramina of Monro
The third ventricle is connected to the fourth ventricle by the:
cerebral aqueduct (aqueduct of Sylvius)
The fourth ventricle is continuous with the narrow central canal of the spinal cord and through its three foramina in its roof, with the _____ _______. The Central canal has a small dilation at its inferior end, called the _______ _______.
subarachnoid space, terminal ventricle
Ventricles are lined with ________ cells are are filled with ______.
ependymal, CSF
Most CSF is provided by the _____ ________ that reside in the lateral, third, and fourth ventricles
choroid plexus
How much CSF is normally found in adults and how much is produced each day?
4-5 oz (125-150ml) and nearly 2 cups are produced each day
What are the percentages of cranial cavity contents of blood, brain tissue, and CSF?
blood 10%, brain tissue 80%, CSF 10%
Raised CSF pressure around optic nerve can cause:
Normal CSF does not contain RBCs. A yellowish discoloration produced by the presences of oxyhemoglobin and bilirubin from RBC hemolysis.
A block of subarachnoid space in vertebral column may be detected by compressing internal jugular veins. If a rise in cerebral venous pressure fails to occur the patients is said to exhibit a positive:
Queckenstedt's sign
Capillaries in CNS have the following structures:
endothelial cells and "tight junctions", continuous basement membrane surrounding capillaries outside of endothelial cells, foot processes of astrocytes that adhere to outer surface of capillary walls
The yellowing of the brain in fetus, newborn, or premature infant where BBB is not fully developed:
Lipid-soluble anesthetic agent that readily crosses BBB after intravenous injection:
thiopental (sodium pentothal)