W19-L10: Meninges

Question 1

Function of the meninges

Answer 1

Prevent rotation of the brain

Question 2

Falx cerebri

Answer 2

lies in midline between two cerebral hemispheres (in sagittal plane), attaches to crita galli ant. and post. to internal aspect
of external occipital protuberance

Question 3

Tentorium Cerebelli

Answer 3

roofs over

post. cranial fossa separates cerebellum and occipital lobe, attaches to marigins of post cranial fossa

Question 4

falx cerebelli

Answer 4

separates hemispheres of cerebellum beneath tentorium cerebelli

Question 5

diaphragma sellae

Answer 5

roofs over pit where pituitary gland

sits

Question 6

Venous sinuses of Dura mater receive blood from where?

Answer 6

sinuses recieve
blood from scalp (emissary vein) and spongey bone (diploic vein)
and brain

Question 7

Venous sinuses of Dura mater

Answer 7

endothelial lined spaces that exist between two layers of dura

Question 8

straight sinus

Answer 8

where ISS meets great cerebral vein of galen (where falx cerebri meets tentorium)

Question 9

cavernous sinus

Answer 9

either side of the body of the sphenoid in which some structures
run

Question 10

transverse sinus

Answer 10

after confluence of sinuses and runs in the root of tentorium cerebelli

Question 11

sigmoid sinus

Answer 11

At the petrous bone (edge of middle cranial fossa) sinus leaves tentorium and runs down into jugular foramen

Question 12

Middle Meningeal Artery is a branch of the which artery?

Answer 12

branch of the maxillary artery

Question 13

Where does the middle meningeal artery enter the skull?

Answer 13

middle meningeal artery enters by foramen spinosum, grooves the internal
surface of the pterion (divides into ant. and post components)

Question 14

Most common causes of subdural haemorrhage

Answer 14

tearing of cerebral bridging veins where they meet the SSS