 The thalamus of the cat includes a hypothalamus, an epithalamus, a lateral geniculate nucleus, and additional secondary nuclear structures.The domestic cat brain also contains the hippocampus, amygdala, frontal lobes (which comprise 3 to 3.5% of the total brain in cats, compared to about 25% in humans), corpus callosum, anterior commissure, pineal gland, caudate nucleus, septal nuclei and midbrain.Grouse "et al."