part of part_of ventral_to brachial lobe of brain The anterior-most part of the brain located ventral to the esophagus. The large axial nerve cords that run down the centers of the arms connect to this lobe. In octopods this lobe is fused with the rest of the subesophageal mass while in decapodiforms and <strong>Vampyroteuthis</strong> it is separate from the remaining brain. anterior subesophageal mass anterior subesophageal mass of brain lobe of brain subesophageal mass of brain esophagus