The two muscles of the group—the iliacus and the psoas major—arise from different areas of your pelvis and lumbar spine to form a common attachment in your hip. Knowing the anatomy of this muscle can ...

Healthy volunteers underwent painful thermal stimulation and their facial expressions were measured using the Facial Action Coding System, a standardized tool that analyzes facial movements based on ...

Hemifacial spasms can tug the mouth and other facial muscles to one side, which makes a person's face asymmetrical and can give someone with HFS a facial expression that looks like a grimace. From ...

You will be redirected to our submission process. Facial expressions are one of the most important forms of non-verbal communication used to convey information about one’s emotional state. The ability ...

Dimples, charming indentations often gracing smiles, arise from a zygomaticus major muscle variation. This genetic trait, ...

Here’s a condensed breakdown of the thigh muscle anatomy: Quadriceps. The quadriceps are the largest and most powerful muscles in your body. They allow you to extend your knees and flex your ...

Dermatologists and plastic surgeons explain why your Botox isn't lasting as long anymore — and what you can do to prevent ...

their facial muscles did not move. They didn't laugh, frown or grimace. Their faces maintained an even expression throughout the test. The people with regular depression, however, still giggled ...

This article was originally published with the title “ The Origins of Facial Expressions ” in Scientific American Magazine Vol. 213 No. 4 (October 1965), p. 88 doi:10.1038 ...

What Is the Body’s Core? Your body’s core is the term used for the group of muscles within your midsection that stabilize your spine and pelvis. Several muscles and groups of muscles make up ...