Gudden's Commissure

Gudden's commissure, nuclei. G. commissure—a bundle of fibers passing from one optic tract to another at the posterior angle of the chiasma. This bundle does not degenerate after enucleation of the eyeballs. Its fibers have been traced to the corpus geniculatum mediale. G. nuclei—two nuclei in the area of the tegmentum of the Varolian bridge—nuclei tegmenti dorsalis et ventralis; the first lies in the gray matter of the fourth ventricle, the second is located in front of and outside the fasciculus longitudinalis posterior, in the reticular formation. In these nuclei ends the tractus mamillotegmentalis Gudden, which originates in the corpus mamillare together with the bundle of Vicq d'Azyr (tractus mamillo-thalamicus).