Fig 4.

Gross specimens of the brain of cats in longitudinal section. (a) Normal cat. (b) Cat with moderately severe hypertension. The cerebral gyri are swollen resulting in compression in the rostral aspect of the cerebellum (arrowhead). Note the coning of the cerebellar vermis, which is a consequence of herniation of vermis through the foramen magnum (arrow). (c) Cat with severe hypertension. Similar features are noted as in (b). The cerebrum appears rounded, and there is severe coning and caudal displacement of the cerebellar vermis (arrow). Courtesy of Dr C Brown, University of Georgia, Athens, GA, USA