Vascular Territories Of The Brain

Vascular Territories Of The Brain

Question 1. Describe briefly the arterial supply of the inferomedial surface of the cerebral hemisphere.
Answer.

• Medial surfaces of the frontal and parietal lobes are supplied by the anterior cerebral artery.
• Medial surfaces of the occipital and most of the temporal lobes (except the temporal pole) are supplied by the posterior cerebral artery.
• The medial surface of the temporal pole is supplied by the middle cerebral artery.
• The medial part (one-third) of the orbital surface (of the inferior surface) is supplied by the anterior cerebral artery. The lateral part (two-thirds) of the orbital surface, as well as the temporal pole on the inferior surface, is supplied by the middle cerebral artery.
• The rest of the tentorial surface (of the inferior surface) is supplied by the posterior cerebral artery.

Question 2. Write a short note on the great cerebral vein of Galen.
Answer.

The great cerebral vein of Galen is formed by the union of two internal cerebral veins below the splenium of the corpus callosum. It joins the inferior sagittal sinus to form the straight sinus. The tributaries of the great cerebral vein are as follows:

• Internal cerebral veins
• Basal veins

Question 3. Enumerate the deep cerebral veins.
Answer.

The deep cerebral veins are:

• Thalamostriate veins
• Choroid veins
• Septal veins