That means the human brain is wired to react to facial expressions even without vocal cues — a dominant smile suggests a potential threat, so stress level increases. (sciencemag.org)
A team led by Sophie Scott, a neuroscientist at University College London, used functional magnetic resonance imaging (fMRI) to determine the neural processing of vocal cues associated with four emotions: amusement, triumph, fear and disgust. (scientificamerican.com)
[Attila Andics et al., Voice - Sensitive Regions in the Dog and Human Brain Are Revealed by Comparative fMRI] Seems that thousands of years of domestication have made our furry friends sensitive to the same vocal cues we are. (scientificamerican.com)