Facial expressions are commonly used to assess pain and other emotional states in humans, but can the same be said for horses? Researchers have been trying to streamline an effective and accurate way to detect pain in horses. Grimace scales have been designed by monitoring the appearance of facial changes from individual or a combination of muscles of the face. These grimace scales are species-specific, and are said to be more advantageous than other methods generally used to detect pain in animals. |