Why Are Puppy Eyes So Irresistible?

The video explores how domestication has shaped dogs' facial muscles, particularly the Levator angularly oculi medialis, enabling them to communicate with humans through expressions like the inner eyebrow raise. This trait, absent in wolves, enhances the human-dog bond by triggering oxytocin release. Dogs have more fast twitch fibers than wolves, allowing rapid facial movements for expressions and barking. Selective breeding favored dogs with human-like expressions, strengthening our emotional connection with them.

What unique muscle in dogs is responsible for their ability to make 'puppy eyes'?

• Orbicularis oculi

• Zygomaticus major

• Masseter

• Levator angularly oculi medialis

How does the hormone oxytocin affect the relationship between humans and dogs?

• It induces sleep

• It increases appetite

• It promotes bonding

• It causes aggression

What type of muscle fibers do dogs have more of compared to wolves, allowing for rapid facial expressions?

• Elastic fibers

• Intermediate fibers

• Fast twitch fibers

• Slow twitch fibers

What behavior in wolves is supported by their higher number of slow twitch fibers?

• Howling

• Barking

• Jumping

• Running

What has selective breeding in dogs led to in terms of their facial expressions?

• Less expressive faces

• Expressions similar to humans

• Increased vocalizations

• More aggressive expressions