Jun 20, 2019 07:00:00

The dog has evolved with evolution 'puppy-like eyes' to move the human mind

by

sydneycbd

A dog is a very expressive animal, and when you look at it with a “ puppy-like eye ” that makes you feel pity and cuteness by putting the moth inward, you just want to be pampered. Such dogs are considered to be wolves being domesticated animals, but when they were kept by humans, research results were announced that they evolved to be able to move their eyes emotionally.

Evolution of facial muscle anatomy in dogs | PNAS
https://www.pnas.org/content/early/2019/06/1/1820653116

Dogs Evolved Sad Eyes to Manipulate Their Human Companions, Study Suggests
https://www.livescience.com/65738-how-dogs-evolved-sad-eyes.html

'Puppy Dog Eyes' May Have Evolved Just to Make Humans Melt-And It's Working
https://www.sciencealert.com/dogs-evolved-special-muscles-around-their-eyes-just-to-communicate-with-humans

Studies

have shown that dogs have been human partners for about 33,000 years, and it has also become clear that humans have genes that make it easier to feed dogs . Julian Kaminski, a behavioral psychologist at Portsmouth University, has conducted research to see that the cute look that such a dog shows to humans is an ability that has evolved from a wolf and was newly acquired.

In the past, Kaminski et al.'S research team has published the research results that 'dogs become more expressive when people look at themselves'. The result shows that the dog understands that 'humans are vulnerable to the cute look of dogs,' and that they are trying to communicate when they are facing us.

Kaminski and his colleagues dissected four dead wolves and six dogs and examined how muscles near the eyes developed. Then, while the wolf did not develop almost any muscle to move the eyebrows etc., 5 out of 6 dogs in the dog had muscles that could lift the eyelids and move around the eyes It became clear. Of the dogs, it was the Siberian husky, which is said to be a breed close to wolves, that did not develop muscles near the eyes.

Anne Burrows of the University of Duquein, who actually did the dissection, stated that 'the movement from the dog's coffin to the inside is brought about by the movement of muscles that are not present in the wolves closest to the dog' The The dog is believed to have developed facial muscles as a means of communicating with humans as a result of being domesticated.

The research team also looks at the differences between dog and wolf communication with humans. In the experiment, 27 sheltered dogs and 9 wild wolves were spent for 2 minutes near unfamiliar humans and photographed. As a result, the dog was moving facial muscles to create 'puppy-like eyes' five times as often as wolves.

The research team said that the evolution of muscle changes usually occurs slowly, and the difference in muscles of the face in tens of thousands of years is a 'significant change'. The research team believes that this evolution has taken place because the dog's facial expression has a positive effect on human interaction, said Bridget Waller, an evolutionary psychologist at Portsmouth University, 'Using this muscle, the dog The eyes look bigger and look like a child, and it is also possible to imitate the expression of when people are sad. '

Kaminsky said, “When the dog moves near the eyes, it appears to elicit a strong desire to take care of the human dog. This human reaction causes the dog to move more strongly and selectively It would have been an advantage, and it would have strengthened the ability of the offspring to produce 'puppy eyes'. ”

by mistenpart

On the other hand, Clive Wein, a researcher at Arizona State University, admits that the point of view of the study is very cool, but this is a small scale study conducted on a small number of dogs and wolves. Pointed out that it was. He argued that wolves did not show rich expressions to humans, probably because they had less human contact, and that they needed further research.