Animal Welfare Institute

Müller, B. R., Souza Soriano, V., Biscarra Bellio, J. C. et al. 2019. Facial expression of pain in Nellore and crossbred beef cattle. Journal of Veterinary Behavior 34, 60-65.

Although the science of facial expression of pain in humans is advanced, it has not been extensively explored in nonhuman animals. The study of facial expression as an indicator of pain might ...
Medicine Buffalo

OUCH! Computer system spots fake expressions of pain better than people

BUFFALO, N.Y. — A joint study by researchers at the University of California, San Diego, the University at Buffalo, and the University of Toronto has found that a computer–vision system can ...
Animal Welfare Institute

Gris, V. N., Crespo, T. R., Kaneko, A. et al. 2024. Deep learning for face detection and pain assessment in Japanese macaques (Macaca fuscata). JAALAS 63(4), 403–411.

Facial expressions have increasingly been used to assess emotional states in mammals. The recognition of pain in research animals is essential for their well-being and leads to more reliable research ...
Scientific American

A Smile at a Wedding and a Cheer at a Soccer Game Are Alike the World Over

In the 19th century, French clinician Guillaume-Benjamin-Amand Duchenne posited that humans universally use their facial muscles to make at least 60 discrete expressions, each reflecting one of 60 ...