Protection Flashcards
Meninges- dura mater
strongest. single layer of fiborous connective tissue surrounding CNS. Extends to S2.
made up of periosteal and memingeal (brain only)
epidural space
fat rich, cushioning space just external to dura mater
subdural space
thin fluid filled space in between dura mater and arachnoid mater
Meninges- arachnoid mater
layer lies deet to the dura mater. extends to S2
subarachanoid space
filled with CSP and large blood vessels that supply the neural tissue; space is spanned by web like threads that anchor the arachanoid mater to pia mater.
Meninges- Pia mater
innermost layer of meninges. Clings tightly to the surface of the CNS. richly vascularized with small blood vessels. Extend to coccyx covering the filum terminale
Denticulate ligaments
later extensions of pia mater of spinal cord that anchor the spinal cord laterally to the arachnoid and dura mater. THroughout the length of the cord.
Dura Mater (brain)- Periosteal
outer layer, attaches to internal surface of skull bones
Dura Mater (Brain)- meningeal
deeper layer which forms external covering of the brain and is continuous with dura mater that surrounds the spinal cord.
Dura sinuses (Brian)
blood filled. conduct blood to jugular veins in neck.
Superior sagital sinus is the largest and is superior to the midline
Dura Mater (brain)- Falx cerebi
sheet in the median plane in the longitundinal fissure between hemispheres. Attaches to crista galli.
Falx Cerebelli
verticle partition, extends inferiorly from posterior part of flax cerebri and runs along vermis of cerebellum.
Tentorium Cerebelli
almost horizontal sheet. in transverse fissure between cerebrum and cerebellum. encloses transverse sinus
arachnoid villi
knoblike projections formed by the arachnoid mater. project into superior sagittal sinus. act as valves that allow CSF to pass from sabarachnoid space into dural blood sinuses.
Meningitis
inflamed meninges due to infection
