FIGURE 2-16 The Cerebellum and Movement (A) Their relatively large cerebellum enables finely coordinated movements such as flying and landing in birds and pouncing on prey in cats. Slow-moving animals such as the sloth have a smaller cerebellum relative to brain size. (B) Like the cerebrum, the human cerebellum has left and right hemispheres, an extensively folded cortex with gray and white matter, and subcortical nuclei.