First Lab Practical Flashcards
From where do the veins emerge in the brain?
Sulci
T/F The veins that emerge from the sulci of the brain run upwards and merge within the arachnoid layer.
True
What is the large vein that emerge behind the midbrain?
Great cerebral vein
What are the three sinuses that drain almost all of the blood from the brain?
Two sagittal sinuses (superior/inferior), the straight sinus, and the two transverse sinuses
What are the openings through which veins enter the venous sinuses of the brain?
Lacunae
Where does the superior sagittal sinus end?
Where the falx cerebi and the tentorium meet
Where does the straight sinus run?
Along the junction between the falx and the tentorium. Drains into confluence
What structures feed blood into the straight sinus at its upper end?
Inferior sagittal sinus and the great cerebral vein
What is the area of major joining and branching of sinuses?
The confluence of sinuses
What are the sinuses that receive venous blood from the confluence of sinuses?
Transverse sinuses
Where does the transverse sinus run?
Within the attached border of the tentorium
Where does the transverse sinus empty its venous blood?
Sigmoid sinus
Behind which bone is the sigmoid sinus located?
Petrous part of the temporal bone
Where does the sigmoid sinus empty its venous blood?
Into the internal jugular vein
What are the arachnoid granulations? Where are they located?
Upwards protrusions of the arachnoid membrane that allow the CSF to return to blood. Superior sagital sinus
