Intermediate Straight Sinus Quiz

Q1. Where does the inferior sagittal sinus run before contributing to the straight sinus?

• Superior border of the tentorium
• Lateral wall of the cavernous sinus
• Free inferior margin of the falx cerebri
• Floor of the fourth ventricle

Q2. What is the traditional eponym for the great cerebral vein?

• Vein of Rosenthal
• Vein of Trolard
• Vein of Labbe
• Vein of Galen

Q3. Which paired veins unite to form the great cerebral vein?

• Facial veins
• Superior ophthalmic veins
• Internal cerebral veins
• External jugular veins

Q4. Which dural sinus contributes venous blood from the falx and nearby medial cerebral surfaces to the straight sinus?

• Occipital sinus only
• Inferior sagittal sinus
• Superior petrosal sinus
• Sigmoid sinus

Q5. Why does the straight sinus tend to remain patent rather than collapsing like an ordinary thin-walled vein?

• Its wall contains thick smooth muscle
• Its lumen contains cartilage
• Its walls are supported by firm dural attachments
• Its wall is reinforced by ventricular ependyma

Q6. What is the usual posterior destination of the straight sinus?

• Superior ophthalmic vein
• Cavernous sinus
• Internal jugular vein without an intervening sinus
• Confluence of sinuses

Q7. Which structure lies below the tentorium near the straight sinus region?

• Cerebellum
• Pituitary gland
• Olfactory bulb
• Frontal lobe

Q8. What makes the straight sinus a useful landmark on a midsagittal view?

• It identifies the carotid bifurcation
• It marks the central sulcus
• It identifies the falcotentorial junction
• It forms the cerebral aqueduct

Q9. Which deep venous channels are directly upstream from the great cerebral vein?

• Posterior auricular veins
• Retromandibular veins
• Internal cerebral veins
• External jugular veins

Q10. Why may straight sinus blood preferentially drain into one transverse sinus?

• Asymmetry of the confluence and transverse sinuses
• Alternating valves inside the straight sinus
• Conversion of the sinus into an artery
• Normal closure of one transverse sinus in adulthood