Employing a bicommissural reference, a selection of slices in three spatial dimensions, axial, coronal and sagittal, was obtained with the objectives to localize structures of the internal cerebral anatomy of the spider monkey, especially of the fifth temporal gyrus, the anterior white commissure, the gyrus of the cingulum and the great sulci, and to compare these structures afterwards to the cerebral structures of the human (H.
In this study, the structures mentioned were compared, such as the fifth temporal gyrus, the medial face of the hemisphere, the anterior white commissure, the fornix, the hypothalamus and the third ventricle, among others.
In Figures 3, 4, 5, 6 and 7 similarities among the two species of primates were found, especially in regard to the morphology of the cingulate gyrus, the fornix, and the anterior white commissure, with the human one presenting greater complexity in its pattern of gyration.
The same disposition could be seen in the case of the anterior white commissure, the striatum, the internal capsule and the tail of the caudate nucleus (Fig.
6), as could also be the anterior white commissure (same Fig.
The anterior section lay at the level of the anterior white commissure (Fig.
15), in the coronal section, at the level of the anterior white commissure, one could see all the structures as in the spider monkey but varying with respect to a more complex anatomical pattern.
Evidence is provided for the fact that the limbic structures the fifth temporal gyrus, the amygdala, the hippocampus, the anterior white commissure, the ventral striatium and the perihippocampal area, are similar in form in the two primates, the human and the spider monkey.