The term rostral periolivary region refers to a group of large multipolar neurons, one of four groups identified by Nissl stain in the periolivary region of the human superior olivary complex. It extends from the superior olive laterally to the ventral nucleus of the lateral lemniscus. The other groups are the dorsomedial periolivary nucleus, the medial periolivary nucleus, and the ventral periolivary nucleus. Functionally it is part of the subcortical auditory system ( Amunts-2012 ).