188 Ibid., xix., 2, pp. 59-84.
189 G. u. S., vol. ii. p. 324.
190 Klin. Monatsblätter f. Augenheilkunde (extra number 2), 1874.
191 Arch. f. Psychiatrie, vol. ii. p. 21.
192 A. f. O., xx., 2, p. 226, and also Ibid., xxv., 1, p. 1, 1879.
From similar experiments on rabbits, Mandelstamm193 maintains that there is a total crossing at the chiasm, and Michel,194 who repeated Von Gudden's experiments, arrived at the same conclusion. Brown-Séquard195 asserted that a medial cut of the chiasm in rabbits produces amaurosis of both eyes, which would indicate that there is total crossing, while Nicati196 a year later showed that a median section of the chiasma in young cats did not produce blindness of each eye, the animal following with the eye and the head the movements of a light held at a considerable distance from the eyes.197 The condition of the optic nerve and brain obtained from the human subject, where by accident or by disease one of the eyes has been destroyed long before death, seems in the main to speak for partial decussation. Thus, Biesiadecki, while maintaining total decussation, could only conclude from such specimens of degenerated nerves and tracts that the greater part of the fibres of the atrophic nerve went to the tract of the opposite side. Woinow198 demonstrated preparations to the Ophthalmic Society at Heidelberg where the left eye had been blind for forty years, and the atrophy, which had travelled up the left nerve, was plainly visible in both optic tracts. Schmidt-Rimpler199 also showed atrophy of both tracts more marked in that of the opposite side, and Manz200 found atrophy of both tracts after atrophy of the nerve of one side; Plink201 reports a similar state of affairs; while Popp202 and Michel203 from analogous specimens draw conclusions favorable to the total crossing.
193 Ibid., xix., 2, p. 47.
194 Ibid., xxiii., 2, p. 227.
195 Archiv de Physiologie, 1872, p. 261, and 1877, p. 656.
196 Ibid., 1878, p. 658.