Random, discrete, rapid movements that jerk the pelvis, trunk, limbs, with involuntary facial movements and non-stereotyped patterns, are characteristic of which movement disorder?

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Chorea is characterized by brief, rapid, irregular, and involuntary movements that "jerk" from one muscle group to another, often affecting the face, trunk, and limbs. These movements are non-stereotyped and can appear dance-like or fidgety, with unpredictable intensity and location. This contrasts with other movement disorders: dystonia involves sustained or repetitive muscle contractions that cause abnormal postures; athetosis features slow, continuous, writhing movements (especially of the hands and feet); myoclonus consists of brief, shock-like jerks that are typically very sudden and shorter in duration. The combination of random, rapid, non-repetitive movements across multiple regions, including facial involvement, best fits chorea.