Add Yahoo as a preferred source to see more of our stories on Google. Q: What is stiff person syndrome with which Celine Dion was diagnosed? A: Stiff-person syndrome (SPS) is a rare neurological ...

Add Yahoo as a preferred source to see more of our stories on Google. You've likely heard of sciatica before. The shooting pain that runs down your lower back, buttocks and leg can disrupt your daily ...

Background A 28-year-old woman presented to hospital after an episode of severe lower back spasms that occurred during a stressful family gathering. She had a history of progressive difficulty bending ...

The involuntary contraction of muscles that occur when your knee twitches, are usually caused by the muscles in your thigh, rather than the knee itself. The occasional twitch of your knee (or any body ...

Your groin area is the region between your lower abdomen and your upper thighs. A pinched nerve in the groin happens when tissues — like muscles, bones, or tendons — in your groin compress a nerve.

A former intern at The Scientist, Amy studied neurobiology at Cornell University and later earned her MFA in creative writing from the University of Iowa. She is a Los Angeles–based writer, editor, ...

Muscle knots are highly irritated muscle fibers that have tightened into a ball in one area of your muscle. These painful, tender spots can feel sore and often occur in your upper back, shoulders, or ...