Video 1.

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Patient in a Sitting Position with Myoclonic Jerks of the Upper and Lower Limbs during Rest, while Maintaining Posture, and during Action. The myoclonic jerks interfered with holding a glass of water and pouring water from one glass into another. Dystonic posturing of both hands in an outstretched and flexed posture of the arms can be seen. During writing with the right hand, dystonic posturing of the first and second fingers and hyperextension of the wrist is also seen. The following facial features can be observed: thin upper lip, smooth philtrum, telecanthus, and long face.