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Question 1

dura mater parts

Answer 1

dura mater spinalis: on the medulla spinalis (spinal chord)

dura mater encephali (cranial dura, fused to periosteum)

Question 2

meninges consist of

Answer 2

dura mater, arachnoid mater and pia mater

Question 3

function of meninges

Answer 3

envelope brain and spinal chord, and also supportblood vessels and contain cerebral fluid)

Question 4

2 folds of the dura mater (toughest layer)

why are there folds?

Answer 4

1. falx cerebri - btw the two cerebral hemispheres (fissura longitudinale cerebri)
2. tentorium cerebelli - btw cerebrum, cerebellum and diaphragma sellae

–> structural support to prevent excessive movement within skull

Question 5

diaphragma sellae

Answer 5

collar around neck of pituitary and forms “roof” of hypophyseal fossa

Question 6

btw dura mater and arachnoid mater

Answer 6

subdural space for lymph - like fluid

in dura mater spinalis too!

Question 7

arachnoid mater

Answer 7

delicate layer that follow ALL curves of brain/SC, have arachnoid villus which are small protrusions through dura mater into venous sinus that allow cerebral fluid to enter/exit blood stream

Question 8

subarachnoid space

Answer 8

contain CSF(cerebrospinal fluid), largest part of this space=cisterne which are used for collection of CSF

Question 9

pia mater

Answer 9

innermost layer fused to brain and spinal chord

many arteries within pia mater penetrate brain and spinal chord

Question 10

silver line on spinal chord

Answer 10

pia mater thickening filling the fissura ventralis

Question 11

how is the tube containing spinal chord made by meninges

Answer 11

in for. magnum the dura mater spinalis splits from normally fused periosteum to form a separated tube

Question 12

space of the dura mater spinalis

Answer 12

cavum epidurale - contain fat to cushion spinal chord for movement in back and neck

Question 13

4 cisterna subarchnoidales

Answer 13

1 - cisterna cerebellomedullaris
2 - cisterna valleculae lat cerebri
3 - cisterna chiasmatis (around chismatis opticum)
4 - cisterna interpeduncularis (fossa interped.)

Question 14

cranial arachnoid mater is connected to cr pia mater by

Answer 14

arachnoid trabeculae (crosses the subarachnoid with CSF)

Question 15

circle of willis

Answer 15

cerebral arterial circle - supply blood to brain and sorrunding structures

Question 16

a. basilaris ex

Answer 16

a. spinalis ventralis ex
- a. vert
(r. descendens, r. anast. comm. cum a. occipitalis)

Question 17

basilar ramuses to the 1: cerebellum and 2: pons

Answer 17

a. cerebelli rostr et caud

rr. ad. pontem

Question 18

how does the basilar artery connect to the rostral cerebral part of the blood supply

Answer 18

the basilar artery divites at rostral part of pons to 2*a. communicans caud which gives off a. cerebri caud (+ input from internal carotid)
to
a. cerebri rostr (give off a. cerebri media)

the two cran cerebral aa. run under chiasma opticum and join to form a. communicans rostr

Question 19

in the falx cerebri of dura mater we find 2 venous systems

Answer 19

sinus saggitalis dorsalis (big), sulcus saggitalis - paired

sinus saggitalis ventralis (small) - paired

Question 20

the dorsal and ventral saggital sinuses are connected with

Answer 20

sinus rectus

Question 21

the sinus saggitalis dors ends in

Answer 21

two sinus transversus which lead to sinus temporalis (one each) which run inside the temporal muscles(meatus temporalis)

Question 22

the two sinus temporalis communicate with the ventral venous system through

Answer 22

sinus petrosus ventralis run ventrally and gain input from the sinus (2*) basilaris, which run on either side of the basilar artery.

Question 23

sinus petrosus ventralis continuation

Answer 23

the two sinus petrosus ventralis each continues along for. lacerum rostrally to the hypophysis to form sinus intercavernosus on either side of hypophysis, with two sinus intercavernosus transversly btw the two

Question 24

connection of the sinuses of the dura mater to the veins of the skull

Answer 24

vv. emissariae found along the sinus systems