Unit 1_Meninges Flashcards
What three layers of connective tissue membranes surround the brain and spinal cord?
dura mater
arachnoid
pia mater
What is the outer layer consisting of dense, tough, non-elastic, connective tissue firmly attached to the bones of the cranium?
Dura Mater
What is underneath the dura mater which separates the dura from the next layer, the arachnoid. It is also referred to as a potential space. Parts of these potential spaces may become blood filled cavities as a result of certain types of hemorrhage.
The subdural space
What is the space between the skull and the dura mater that is potential space?
Epidural space
What are cavities that are split within the dura mater where venous structures surround the central nervous system?
Sinuses
What meninge includes arterial vasculature with capillaries and some space?
Arachnoid mater
What menine hugs the surface of the brain, spinal cord, central nervous system?
Pia mater
What are pouches within the arachnoid mater that go through the dura mater into the sinus and play an important role in cerebral spinal fluid flow?
Arachnoid villi
What glia cell is going to help take some metabolites from the blood and bring it to the neurons so the neurons can receive fuel?
Astrocyte
What are double folds of dura mater that invaginate into the brain to form dural septa which separate various sections of the brain? These provide structural support for the brain and serve to anchor it within the cranium.
Dural Reflections
What do the intervals or spaces between dural reflections and the dura mater that remains opposed to the cranium house through which all of the venous blood leaving the brain travels?
Dural venous sinuses
What is a fold of dura that extends down into the longitudinal fissure between the cerebral hemispheres (vertical orientation)?
Falx Cerebri
What is a fold of dura that separates the occipital lobes of the cerebrum in the supratentorial compartment from the cerebellum and brainstem below in the infratentorial compartment (horizontal orientation)? The anterior free border forms the tentorial notch which accommodates the midbrain.
Tentorium Cerebelli
What dural sinus runs along the superior attachment of the falx cerebri and is vitally important to the absorption of cerebrospinal fluid?
Superior Sagittal Sinus
What dural sinus runs along the cingulate gyrus above the corpus collosum?
Inferior Sagittal Sinus
What dural sinus runs along the posterior aspect of the tentorium cerebelli?
Transverse Sinus
What dural sinus runs underneath the cerebellum towards the midbrain area?
Straight Sinus
What dural sinus branches off towards the diencephalon from the posterior lateral aspect of the brain?
Sigmoid Sinus
Where do cerebral veins, which drain the brain, empty into from which blood flows into the internal jugular vein?
Venous Sinuses
What is the middle layer of meninges - separated from the dura by the subdural space? This meninge bridges the sulci of the brain (as does the dura) and only extends down into the major fissures of the cerebrum?
Arachnoid mater