Question

Anastomoses are connected vessels that form a network, providing alternate blood supply routes. These veins lie between which two lobes of the brain?

Answer 1

• The brain has an anastamotic venous circle that is homologus with the circle of willis which is an arterial anastamoses in the brain.This anastomotic venous circle is located at the base of the brain.

It is formed by the

• anterior and posterior communicating veins -------They link the anterior and posterior segments of the basal veins of Rosenthal .
• These veins lie between the left and right cerebral lobes

The superficial anastamotic veins are

• The superior anastomotic vein of Trolard---
  • It is seen in the region of the parietal lobe.
  • It drains to the superior sagittal sinus
  • It connects to the inferior anastomotic vein of Labbe and superficial middle cerebral vein.
• The inferior anastamotic vein of Labbe
  • It connects the superficial middle cerebral vein with the transverse sinus.
  • Its location can be highly variable