Neuroanatomy: Meninges

Question 1

Meninges

Answer 1

Coverings that surround the entire CNS

Question 2

Meninges Main Functions

Answer 2

Protect, Support vascular elements, and enclose the subarachnoid space

Question 3

3 layers of Meninges

Answer 3

Dura Mater, Arachnoid Mater, (subarachnoid space), and Pia Mater

Question 4

Dura Mater

Answer 4

Outermost layer, very sturdy and won’t tear for support. Specializations include Falx cerebri, Falx cerebelli, Tentorium Cerebelli, and dural (venous) sinuses

Question 5

Dural Sinus

Answer 5

include superior sagittal sinus, inferior sagittal sinus, straight sinus, and confluens, and transverse sinus; they are venous channels that receive blood from the cerebral veins and cerebrospinal fluid from the subarachnoid space

Question 6

Arachnoid Mater

Answer 6

Middle layer of meninges, spiderweb-like appearance, encloses the subarachnoid space, provides pathway and support for incoming arteries and outgoing veins (blood vessels are suspended in this layer), includes arachnoid granulations

Question 7

Pia Mater

Answer 7

Innermost layer, very thin (2-3 cell layers), directly adherent to the surface of the brain