The paraspinal muscles, sometimes called the erector spinae, are three muscle groups that support your back. You use them every time you lean to one side, arch your back, bend forward, or twist ...

The gastrocnemius muscle is one of the main muscles of the lower leg. It gives the calf of the leg its rounded, bulging appearance. The gastrocnemius is on the posterior, or back, side of the leg.

The female pelvis is slightly different from the male pelvis. We'll go over the main differences and dive into the anatomy and function of the different parts of the female uterus. You'll also ...