[Myelo- and cytoarchitectonics of the cat pallidum].

600 thick serial frontal and sagittal sections of the cat cerebrum were made. Using the new controlled impregnation technique, it was shown that the pallidum is crossed by numerous transit axons bundles (TAB) consisting of thin myelinated and unmyelinated axons each 0.2-0.8 micron in diameter. TAB pass through the dorsal part of the putamen and the whole pallidum parallel to the sagittal plane and perpendicular to the frontal plane. Such TAB contain not less than 10 million axons in the pallidum of a hemisphere. The TAB are mainly related to the capsula interna and to the sensory-motor cortex. The cyto- and synaptoarchitectonics of the pallidum is described.