Topographic and anatomical features of the sulci structure of the brain's occipital lobe medial surface

Abstract

The complex of macromicroscopic methods has revealed the features of the sulci structure of the brain’s occipital lobe medial surface. Macromicroscopic, morphometric, topographic and anatomical, statistical and mathematical analysis were used. The sulci of the medial surface of the brain's occipital lobe are classified into permanent, typical and non-permanent. The complex of anatomical structures of the medial surface of the brain's occipital lobe includes the parietooccipital sulcus, calcarine sulcus, cuneus, calcarine spur, additional sulci. The parietooccipital and calcarine sulci are divided into segments: posterior (distal process), anterior (proximal process), common (common area). The parietooccipital sulcus is connected to the anterior end of the calcarine sulcus at 98,5 %. The length of the parietooccipital sulcus is min 16,0 mm and max 58 mm, M=35,8 mm, depth is min 9,0 mm and max 43,0 mm, M=24,3 mm. It was found that in 35 % of cases, the posterior end of the calcarine sulcus does not reach the apex (angle) of the occipital lobe of the brain by min 2,0 mm and max 14,0 mm, M=7,8 mm. In 43 % the posterior end of the calcarine sulcus bifurcates. The distance between the posterior end of the calcarine sulcus and the upper end of the parietooccipital sulcus is min 18,0 mm and max 64,0 mm, M=39,8 mm. The length of the calcarine sulcus is min 37 mm and max 79 mm, M=54 mm. The depth of the anterior part of the calcarine sulcus is min 8,0 mm and max 36,0 mm, M=20,7 mm; the depth of the posterior part is min 5,0 mm and max 22,0 mm, M=12,8 mm.