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1 Name the arrowed structure.

2 Name the arrowed structure.

3 Name the arrowed structure.

4 Name the arrowed structure.

5 Name the arrowed structure.

Answers

1 Superior anastomotic vein (Vein of Trolard).

2 Vein of Galen.

3 Inferior anastomotic vein (Vein of Labbé).

4 Basal vein (of Rosenthal).

5 Superior sagittal sinus.

Comments:

The superior anastomotic veins (Veins of Tolard) connect the superior sagittal sinus to the superficial middle cerebral veins, which ultimately drain to the cavernous sinuses. The inferior anastomotic veins (Veins of Labbé) connect the transverse sinuses to the superficial middle cerebral veins.

The right and left basal veins of Rosenthal join with the internal cerebral veins to form the vein of Galen, which is short and runs within the quadrigeminal cistern. This then combines with the inferior sagittal sinus to form the straight sinus, which drains into the confluence of the sinuses.

Exam tip:

 This is a difficult question. The superior and inferior anastomotic veins can be identified because they are large veins draining into the superior sagittal sinus and transverse sinus, respectively.