regional part of brain pyramid of medulla oblongata lobule VIII of Larsell pyramid of medulla pyramis medullae oblongatae DHBA:12535 The anterior or ventral portion of the medulla oblongata is named the pyramid and lies between the anterior median fissure and the antero-lateral sulcus. Its upper end is slightly constricted, and between it and the pons the fibers of the abducent nerve emerge; a little below the pons it becomes enlarged and prominent, and finally tapers into the anterior funiculus of the medulla spinalis, with which, at first sight, it appears to be directly continuous[WP]. BAMS:pym BM:Me-Py medullary pyramid pyramid of medulla oblongata UBERON:0005159 uberon pyramis bulbi FMA:75254 pyramis (medullae oblongatae) structure with developmental contribution from neural crest