The straight sinus is located at the junction between which structures?

• A. Falx Cerebri and Tentorium Cerebri
• B. Superior Sagittal Sinus and Falx Cerebri
• C. Transverse Sinus and Tentorium Cerebri
• D. Inferior Sagittal Sinus and Falx Cerebri

Answer: (A)

The straight sinus is located where two dural folds meet: the falx cerebri and the tentorium cerebri. This junction forms a midline venous channel that runs along the line of contact between these folds. It receives blood from the inferior sagittal sinus and the great cerebral vein (vein of Galen) and then continues posteriorly to become the transverse sinus. That makes the junction of the falx cerebri and tentorium cerebri the correct description. The other options describe sinuses situated along different borders: the superior sagittal sinus along the upper edge of the falx, the transverse sinus at the edge of the tentorium, and the inferior sagittal sinus feeding into the straight sinus but not defining its location.