Taryn Roberts, Paul McGreevy, Michael Valenzuela
Skull size has shifted in two directions in domestic dogs as opposed to wolves. Longer and narrower nose and snout and shorter nose and wider skull. It makes sense that changing the shape of the skull would change the shape of the brain but this is the first study of what exactly is happening. For one thing there is no correlation with skull size, brain size, and body size. There is, however, a “progressive ventral pitching of the primary longitudinal brain axis” and “a ventral shift in the position of the olfactory lobe.” The squashing of the canine skull is a the reduction or deletion of a developmental step that makes the dog look more like a puppy, the permanent or partial infantization of an animal is one important step in domestication. Now how this relates to canine behavior is still unknown.