Arachnoid mater

Question 1

What meningeal layer is it?

Answer 1

Middle

Question 2

Properties of the arachnoid mater?

Answer 2

Spiderweb-like, thin, translucent, collagenous, avascular membrane

Question 3

it tightly/loosely envelops the brain

Answer 3

loosely

Question 4

The outer surface of the arachnoid mater attaches to

Answer 4

the dura mater forming a barrier that prevents the leakage of CSF into the subdural space

Question 5

The inner surface of the arachnoid mater show thin fibrous projections called

Answer 5

arachnoid trabeculae

Question 6

arachnoid trabeculae function

Answer 6

traverse the subarachnoid space and attach to the outer surface of the pia mater

Question 7

Due to their embryological and cellular similarities the pia mater and arachnoid together are referred to as the

Answer 7

leptomeninges

Question 8

Question 9

Arachnoid granulations are also called

Answer 9

Pacchionian bodies

Question 10

Pacchionian bodies are

Answer 10

Mushroom-like” protrusions of the arachnoid mater

Question 11

Pacchionian bodies/ arachnoid granulations are formed by

Answer 11

by evaginations of arachnoid mater through the meningeal layer of dura mater

Question 12

The core of each arachnoid granulation is continuous with

Answer 12

the subarachnoid space

Question 13

arachnoid granulations enter the __________ and facilitate _______________

Answer 13

the venous dural sinuses and facilitate the one-way flow of cerebrospinal fluid (CSF) from the subarachnoid space into the venous circulation

Question 14

arachnoid granulations are found in large numbers along the

Answer 14

Superior sagittal sinus, but are associated with all dural sinuses

Question 15

Answer 15

arachnoid granulations

Question 16

SUBARACHNOID CISTERNS

Answer 16

Formed where significant depressions or fissures in the brain are spanned by the arachnoid mater

Question 17