Tremors A tremor is an involuntary, rhythmic muscle movement. These movements are often back-and-forth actions of one or more body parts. Most tremors affect the hands. However, tremors can occur in…

Sydenam Chorea Chorea is the name given to specific types of movement disorders characterized by twisting or jerky movements of the body or limbs. Movement disorders are conditions that cause…

Myoclonus Myoclonus (say: my-oh-KLOH-nus) is the sudden and rapid twitching of a muscle or a group of muscles. The twitching is caused by uncontrolled muscle contraction or relaxation.  Myoclonus twitches…