[Microvascularization of the human cerebral cortex during development].

Microvascularization of the brain cortex was investigated in 21 brains of human fetuses, from 15th to 25th postovulatory week and one adult human brain. Blood vessels injected with ink-gelatine solution were examined on preparations lighted by the Spalteholz method. In all examined stages of fetal development as well as in the adult brain a regular geometric arrangement of the blood vessels which radially penetrated the brain substance was observed. Centrally placed vascular trunk of bigger diameter surrounded by the blood vessels of smaller calibre was registered. On the basis of the obtained results it can be concluded that the vascularization of the brain cortex in all examined stages of the development follows the pattern of radially placed vascular units.