cerebellum: a major division of the vertebrate brain; situated above the medulla oblongata and beneath the cerebrum in humans
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
respiratory distress syndrome: an acute lung disease of the newborn (especially the premature newborn); lungs cannot expand because of a wetting agent is lacking; characterized by rapid shallow breathing and cyanosis and the formation of a glassy hyaline membrane over the alveoli