Scientists Say Breeding is Changing Dog Brains
Selective breeding has produced major changes in how our dogs look like. But recently, researchers have uncovered some major changes in the dogs' brains have taken place due to artificial selection through breeding. These changes are about the position of the brain and the region with smell control is located. In dog breeds with short snouts the brain has rotated forward with as much as 15 degrees. The region in the brain that controls smell was relocated, according to researchers from the University of New South Wales and University of Sydney. They have used magnetic resonance imaging to analyze brains of dogs for a number of breeds. The size and shape of the skull appeared to be correlated with brain rotation and positioning of the olfactory lobe. When the dog's head and skull shape become flatter, the brain rotates forward while the smell center goes further down towards the lowest position in the skull. Human intervention in the dog biology through breeding is not c...