Developmentally unique cerebellar processing prioritizes self- over other-generated movements.

For adult animals to produce flexible and adaptive movements, they must distinguish self- from other-generated movements and learn to anticipate how their body moves through space. The computations required for this capacity occur within the cerebellar system. In early infancy, these computations are not yet established and must develop through sensorimotor experience. By comparing how the infant cerebellum processes sensory input, we found that it prioritizes input associated with self-generated movements. Such prioritization appears unique to the infant cerebellum and helps us understand how that structure establishes its adult neural circuity and functions.