The isocortex of the ox (Bos taurus). II. The cortical types, serial sections and brain map

1. The cerebral hemispheres of the bovine brain have been studied by making serial sections in the different planes and employing Nissl, myelin and silver (protargol) methods. 2. Ten different cortical (architectural) types have been determined. 3. The somatomotor (Ms I, Ms II), somatosensory (Sm I, Sm II), auditory and visual areas of the cerebral cortex have been delimited. 4. A brain map with a symbolic scheme, has been prepared, based on the cyto- and myeloarchitectural findings and comparative experimental work on the nearest ungulates, other subprimates and primates including man. 5. The importance of the general eulaminate cortex, and its abundance in the frontal, temporal, and parietal lobes of man, which distinguish the human from the other brains are indicated. 6. It is concluded that the preparation of a brain map for this species, is the first step towards future experimental, neurophysiological and related fields of work.