Tennis Neuron is a Purkinje Cell, this is one of the types of neuron that lives in the cerebellum! The cerebellum is also known as the "little brain". The other neurons of our family belonging to this Purkinje Cell group are Yoga Neuron, Biking Neuron, Rock Climbing Neuron. Playing sports involves many parts of the brain, including the cerebellum. The cerebellum is important for balance and movement coordination.