Intermediate Transverse Sinus Quiz

Q1. Along which tentorial margin does the transverse sinus run?

• Free anterior tentorial edge
• Medial free border of the falx cerebri
• Attached posterolateral margin of the tentorium cerebelli
• Anterior margin of the diaphragma sellae

Q2. Which cerebral vein may drain into the transverse sinus or transverse-sigmoid junction?

• Internal cerebral vein
• Great cerebral vein
• Vein of Labbe
• Central retinal vein

Q3. Which sinus can join the transverse sinus near its lateral portion and the transverse-sigmoid junction?

• Inferior sagittal sinus
• Intercavernous sinus
• Superior petrosal sinus
• Basilar venous plexus only

Q4. Which venous territories can contribute directly or indirectly to the transverse sinus?

• Pulmonary veins only
• Cerebral, cerebellar, diploic, and dural venous territories
• Portal venous tributaries only
• Coronary veins only

Q5. Why are the right and left transverse sinuses often unequal in size?

• One side becomes an artery after birth
• One transverse sinus is often developmentally dominant
• One transverse sinus normally closes in adulthood
• The sinuses contain alternating one-way valves

Q6. Which skull landmark is closely associated with the medial origin of the transverse sinus grooves?

• Internal occipital protuberance
• Cribriform plate
• Mandibular fossa
• Anterior clinoid process

Q7. How does the transverse sinus relate to the cerebellum?

• It lies along the tentorial boundary superior to the posterior fossa contents
• It forms the cerebellar peduncle
• It passes through the cerebellar cortex
• It lies inside the fourth ventricle

Q8. Why is the transverse sinus considered valveless?

• It lacks conventional venous valves
• Its lumen is divided by cardiac valves
• It is isolated from other venous channels
• It contains arterial semilunar valves

Q9. Which structure marks the transition from the transverse sinus into the sigmoid sinus?

• A curved transition at the posterolateral cranial cavity
• The cribriform plate
• The optic canal
• The foramen rotundum

Q10. Why can venous imaging show markedly different transverse sinus calibers in a healthy person?

• Normal transverse sinus dominance and asymmetry are common
• The sinus caliber is fixed by arterial pressure
• Both transverse sinuses must always have identical diameters
• A small transverse sinus always proves acute thrombosis