ABSTRACT
The peri-Rolandic cortex, on the basis of neurobehavioral analysis, belonged with the remainder of the cerebral convexity. Thus a major distinction was made between the functions in behavior of the frontolimbic formations and those of the posterior cerebral convexity. There is an important attribute by which the systems of the central part of the cerebral mantle differ from others: the peri-Rolandic systems are the only forebrain systems by which the organism can manipulate his or her environment. The subdivisions of the cingulate cortex follow the subdivisions of the anterior thalamic nuclei: Nucleus anterior medialis projects to the anterior cingulate cortex; nucleus anterior lateralis, to the posterior cingulate cortex. Finally, the primate anterior far frontal cortex can be subdivided according to subdivisions of the nucleus medialis dorsalis: The microcellular part projects to the dorsolateral frontal cortex, the perilamminar magnocellular part to the periarcuate cortex, and the midline magnocellular part to the orbitofrontal cortex.
