The plane of section is slightly oblique so that the right side is cut more posteriorly than the left. The view is from behind. The olfactory tracts can be traced posteriorly from the olfactory bulbs into the foreground of the view where the olfactory trigone is visible. The medial olfactory stria is more clearly seen on the left whereas the lateral olfactory stria can be traced on the right side across the anterior perforated substance into the limen insulae. The relations of the medial olfactory stria and the subcallosal gyrus (11) are shown. The anterior cerebral arteries are cut off from their origin from the middle cerebral arteries. The anterior communicating artery is visible and beyond this the two vessels course in the depths of the longitudinal fissure around the genu of the corpus callosum and reappear as cut ends in the upper part of the view.