A bilateral cortico-striate projection

During the course of studies on the projection of the cerebral cortex upon the striatum in the rabbit (Carman, Cowan, and Powell, 1963) and the cat (Webster, 1964) degeneration was seen bilaterally in Nauta preparations of the striatum in some, but not all, animals. For two main reasons this observation was not included in the earlier study. First, because of the difficulty of interpreting any findings of bilateral degeneration in silver preparations, and, particularly as it is well known that the striatum commonly shows pseudo-degeneration, it was im-perative to exclude this possibility by the prepara-tion of further material using both the frozen and paraffin Nauta methods. Secondly, because degenera-tion was seen in the contralateral striatum in only a