The structural pattern that can be seen with the help of a microscope that the nerve cells form in gray matter. The concept of pattern here includes the shape of the nerve cells, their size, their dense packing and the way they are grouped. Particular importance has been given to "cytoarchitectonics" in connection with the division of the cerebral cortex into different areas; One speaks of cytoarchitectural areas. Of a number of such divisions, the one in so-called " Brodmannareor/BA" is probably the most talked about.