Venous drainage

Question 1

What is the pathway of blood drainage from the brain?

Answer 1

Fine veins (brain) → pial venous plexuses → cerebral veins → dural venous sinuses → internal jugular vein → heart

Question 2

emissary veins

Answer 2

allow veins from the scalp to travel to the dural venous sinuses

Question 3

Where are the venous sinuses located?

Answer 3

between two layers of the dura mater and are protected by the dura

Question 4

What does the venous sinus receive?

Answer 4

blood from the brain and scalp and SCF from the arachnoid villi

Question 5

superior sagittal sinus

Answer 5

lies among the superior margin of the falx cerebri. it joins the transverse sinus (on the right). the arachnoid villi drain the CSF into the superior sagittal sinus

Question 6

inferior sagittal sinus

Answer 6

lies along the inferior margin of the falx cerebri. it joins the straight sinus

Question 7

straight sinus

Answer 7

located within the tentorium cerebelli. the blood drains into the left transverse sinus

Question 8

transverse sinus

Answer 8

the movement of the blood is left continuous with he straight sinus and right continuous with the superior sagittal sinus

Question 9

sigmoid sinus

Answer 9

has a forward continuation of the transverse sinus. it opens into the internal jugular vein

Question 10

cavernous sinus

Answer 10

there are two - one for each hemisphere. they are lateral to the pituitary gland, linked with he venous channel. it drains into the superior and inferior petrosal sinuses

Question 11

superior petrosal sinus

Answer 11

drains into the transverse sinus

Question 12

inferior pastoral sinus

Answer 12

drains directly into the internal jugular vein

Question 13

How can infection occur in the emissary veins?

Answer 13

if there is an infected scalp, the bacteria can enter through the venous sinus and go through the meninges into the brain. this can result in meningitis