First Direct Evidence: Dogs’ Brains Respond Differently to Human Fear, Anger, and Sadness

Happy Faces First, Then Negative Emotions

According to НВ — Техно: August 12, 5:00 PM

An international research team connected to the University of Vienna, with contributors from Mexico and Hungary, has published a study in iScience showing that dogs’ brains do more than sort human expressions into positive and negative. The animals appear to process specific unpleasant emotions-fear, anger, and sadness-through distinct neurological responses. This work adds to a growing scientific effort to understand how companion animals interpret human social signals. The findings are based on two experiments that combined brain scanning with machine-learning analysis.

Inside the Dog Experiments

In the first part of the study, eight pet dogs looked at pictures of strangers with either joyful or neutral faces. The brain scans revealed that happy expressions produced stronger activity in the temporal cortex and the caudate nucleus, structures connected to reward and pleasure.

The second phase involved a separate group of 12 dogs, shown faces expressing happiness, anger, fear, and sadness. Machine-learning algorithms analyzing the neural patterns confirmed that the brain’s response to fear was clearly distinct from its response to anger or sadness. The authors describe this as the first scientific confirmation that different negative human emotions are handled along different neural pathways in a dog’s brain.

Still, the researchers stress that these results do not mean dogs experience emotions the same way humans do. In everyday life, canines rely on a complex blend of cues-facial expressions, body language, tone of voice, and scent-to understand the emotional state of the people around them.

These findings could have practical implications for dog care and training. A better understanding of how dogs perceive human emotions may help owners interact with their pets in ways that support their psychological well-being. It could also improve animal-assisted therapy programs, allowing professionals who work with dogs to tailor their sessions based on how the animals respond emotionally.

Understanding how dogs process human emotions can provide valuable insights into their behavior and training. For instance, researchers have also explored how our expressions can influence canine reactions, revealing fascinating connections between emotion and physiological responses. To delve deeper into the science behind animal perception, check out this article on the brain signals linked to surprise.