part of part of gigantocellular nucleus nucleus of medulla oblongata motor system magnocellular reticular nucleus A nucleus of the brain that is the most ventral portion of the gigantocellular nucleus in the medullary reticular formation, between the lateral paragigantocellular nucleus and the midline or nucleus raphe magnus. Functionally it belongs to the reticular formation (functional) of the subcortical motor system. MARN UBERON:8440073 MBA:307 Shawn Zheng Kai Tan