Meninges And Ventricles Flashcards
What meninges covering the spinal cord and most superficial
Dura mater
What meninges covering the spinal cord are the deepest
Pia mater
What meninges covering the spinal cord are in the middle layer
Arachnoid mater
Location of the extradural(epidural) space
Between dura and vertebrae (contains fat and veins)
Dural sac
Tubular sheath containing spinal cord formed by dura mater
Location of the subarachnoid space
Under arachnoid layer, contains the cerebrospinal fluid
Purpose of the denticulate ligaments
Help suspend spinal cord in dural sac
Spina bifida
Failure of fusion of more than one vertebral arch
Spina bifida cyctica
1 or more fails to develop and cyst develops
Spina bifida occulta
No cyst, usually L5 or S1 fails to form
Purpose of a lumbar puncture
Obtain CSF from subarachnoid space
Purpose of an epidural block
Performed to introduce an anesthetic agent into extradural space
Periosteal layer
Directly deep to bone
Meningeal layer
Deep to periosteal layer
Falx cerebri
Fold that dips into the longitudes fissure and divides cerebral hemispheres; anchors to Crista galli
Falx cerebelli
Divides the cerebellar hemisphere
Tentorium cerebelli
Extends into the transverse fissure between cerebrum and cerebellum and connects to the faux cerebri
Dural venous sinuses
Spaces beteeen the periosteal and meningeal layers of the dura, where layers separate from each other
Purpose of arachnoid trabeculae
Web like arrangement of elastic and collagen fibers that anchor arachnoid mater to pia mater
Role of the arachnoid villi in circulation
Allow CSF to be absorbed back into the vascular system
Name the 4 ventricles of the brain
2 lateral ventricles
Third ventricle
Fourth ventricle
What connects the 3rd and 4th ventricle
Cerebral aqueduct
What ventricle allows CSF to flow inside the spinal cord?
Fourth ventricle
What is the function of the choroid plexus?
Produces CSF
