Researchers have conclusively identified the genetic cause of a rare, progressive movement disorder. A rare extra-long version of a gene appears to cause nerve cells to become poisoned by toxic ...

Add Yahoo as a preferred source to see more of our stories on Google. Q: My cousin was diagnosed with dystonia, what is this? A: Dystonia is a disorder of involuntary muscle contractions that may ...

Stereotypic movement disorder is a motor disorder that develops in childhood, typically before grade school, and involves repetitive, purposeless movement. Examples of stereotypic movements include ...

Tourette syndrome (TS) is a neurological disorder. Tourette syndrome causes unwanted repetitive movements or sounds called tics. TS is more common in males than females. Simple tics are sudden, brief ...

Chorea and hemiballismus are both forms of involuntary movement disorders. Hemiballismus can cause sudden, violent, and flinging motions. Chorea can cause irregular, spontaneous, and nonrepetitive ...

Kristin Weiland is a documentary film producer and writer with a background in crisis management and ethnographic research. She specializes in investigative and social impact documentary projects, and ...

Diaphragm flutter — also known as diaphragmatic flutter or diaphragmatic myoclonus — is a rare disorder in which your diaphragm experiences repeated involuntary contractions. The diaphragm is a muscle ...

Tardive dyskinesia (TD) is an involuntary neurological movement disorder that is usually a side effect of certain dopamine receptor blocking drugs. It mainly affects the face but can also cause ...

Chorea is an involuntary movement disorder that causes irregular muscle movements. It occurs due to the overactivity of dopamine in the brain, which can have many causes. Treatment and outlook both ...

Asterixis is a disorder in which a person loses motor control of some parts of the body. It is commonly called flapping hand tremor because the muscles in the fingers and the wrists are typically ...

This informational guide, part of POPSUGAR's Condition Center, lays out the realities of this health concern: what it is, what it can look like, and strategies that medical experts say are proven to ...