Figure 14-59.

Gyral Herniation, Parahippocampal Gyri, Brain, Transverse Section, Caudal Face, at Level of the Rostral Colliculi and Crus Cerebri, Horse.

The caudal displacement of the parahippocampal gyri (arrows) was caused by a sudden swelling of the brain (increase in intracranial pressure) from severe cerebral blunt force trauma to the head. The other cerebral gyri are swollen and flattened, and sulci are indistinct (cerebral edema).

(Courtesy Dr. M.D. McGavin, College of Veterinary Medicine, University of Tennessee.)