Bike neuron is a cell that lives in the part of the brain called the cerebellum. The cerebellum controls movements that need to be coordinated and balanced - these are needed for biking. Learning to ride a bike takes a lot of patience and practice, however, once you have learned it riding a bike becomes automatic - as the saying goes “it’s like riding a bike”.
Fun Fact: Bike neuron is wearing a helmet. It is important to protect you brain to prevent concussions.