Sinus

Question 1

Superior Sagittarius Sinus

Answer 1

Courses upper fixed border of falx cerebri

Gets blood from superior cerebral veins

communicates laterally w/ outpocketing called venous lacunae

Question 2

Inferior Sagittal Sinus

Answer 2

Courses in lower free border of falx cerebri,

Joins Great Cerebral vein to form straight sinus

Question 3

Straight Sinus

Answer 3

Courses b/w dura layers of junction of falx cerebri and tentorum cerebelli

Posteriorly can join w/ superior sagittal and straight sinus

Question 4

Transverse Sinus

Answer 4

Course posteriorly in fixed part of tentorium cerebelli

Aris either at confluens of sinuses or a continuation of superior sagittal and straight sinus

Question 5

Sigmoid SInus

Answer 5

S shape continuation of transverse sinus

End at jugular foramen to drain into internal jugular veins

Question 6

Occipital SInus

Answer 6

Courses in attached part of falx cerebelli

Drains to confluens of sinuses

Question 7

Cavernous Sinuses

Answer 7

Middle cranial fossa

Each side of sphenoid bone

Surrounds stella turnica where pitiuitary gland sits

Receiveds venous blood from superior and interior opthalmic veins

Anastomoses w/ pterygoid venous plexus: a way infections can spread from face to brain