Add Yahoo as a preferred source to see more of our stories on Google. A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle.

Muscle cramps are sudden, involuntary contractions that can cause sharp, intense pain lasting from a few seconds to several ...

Q: My cousin was diagnosed with dystonia, what is this? A: Dystonia is a disorder of involuntary muscle contractions that may cause repetitive and/or abnormal movement or postures, for example ...

Tardive dyskinesia and dystonia are both neurological disorders that can affect your muscles and cause involuntary muscle contractions. Tardive dyskinesia, which is usually a side effect of some ...

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An Oklahoma girl has become the first pediatric patient in the world to have robotic deep brain stimulation performed on her, two hospitals have announced. The patient, 8-year-old Karliegh Fry, ...

The human body comes with some strange quirks. Stacker reveals the explanations behind some of the weirdest reactions, like ...

Incubated by Atlas Venture, the biotech startup is advancing a daily pill it sees potentially helping people with dystonia or ...

Moderate twitching of your eyelids (also known as myokymia) is common and can be caused by several conditions. We will describe some of the conditions that could lead to myokymia, its symptoms, and ...