What distinguishes us from all other species of animals is the size of the frontal lobe relative to the rest of the neocortex. In cats, the frontal lobe makes up 3.5 percent of their higher brain’s anatomy. The frontal lobe of a dog comprises seven percent of the total new brain. In chimpanzees, and in other smaller primates like the gibbon and the macaque, the proportion of the frontal lobe to the rest of the cortex is about 11 to 17 percent. In humans, however, the frontal lobe makes up 30 to 40 percent of the total volume of the neocortex.
