You've probably heard the claim that it takes more muscles to frown than to smile. It's usually framed as a feel-good reason ...

A "fine-tuned" artificial intelligence (AI) tool shows promise for objective evaluation of patients with facial palsy, ...

A report in The Journal of Craniofacial Surgery highlights anatomy-based techniques designed ... Other potential risks include damage to the facial nerve, resulting in asymmetrical facial movement ...

What makes a smile feel sincere or fake is due to a surprising blend of facial anatomy, neurology and emotional authenticity ...