part of part of medulla oblongata nucleus of medulla oblongata Perihypoglossal nuclei perihypoglossal nuclear complex satellite nuclei A group of neurons in the floor of the fourth ventricle, in close proximity to the nucleus of the hypoglossal nerve in the gray substance of the medulla oblongata, all of which contain cells with characteristics suggestive of reticular connections. PHY UBERON:8440028 MBA:154 perihypoglossal complex nuclei perihypoglossales