Another option is to argue that, while touch does have a disunified and heterogeneous functional and physiological profile, this is also largely true of the other sensory modalities. What each of the systems that seem to be unisensory have in common then isn’t unity in any of the major criteria listed above (physiology, content, stimuli, etc.). Instead, it could be that each of the diverse systems involved in human touch function together to connect or bind sensory features together (Fulkerson 2014c). This binding thesis suggests one way in which the diverse systems involved in touch might hang together, even if there is no single dimension on which touch is always unified.