The left photograph is a picture of the brain of a rather young calf. Let`s say four weeks old. There is a very drastic lesion present. If you will look at the occipital condyles, which are to the left of the photo, you will be getting close to the lesion.
The cerebellum is herniated through foramen magnum. The brain is too big for the cranial vault.
The right photograph is of a sheep or it might be a cow that had neurologic signs and that, on removal of the calvarium, it had a lesion something like the preceding photograph. On further inspection, however, there are many lesions visible on this cut surface.
The yellowish patches of cerebral grey matter are degenerate. This is an unusually obvious gross lesion of polioencephalomalacia.
