On the issue of iris movements after optic nerve transection in mammals

In September last year, we had the opportunity to report to the Society of Neuropathologists and Psychiatrists on the operations we performed to cut the optic nerve inside the skull in mammals (rabbit and cat) and demonstrate the phenomena observed after such an operation on the movements of the iris. The starting point of our experiments were the observations of Marenhi, demonstrating at the Turin Congress of Physiologists in 1900 the phenomenon of pupillary reaction to light in rabbits after the transection of the optic nerve inside the skull.