About Video

This is a variety of adult-onset idiopathic dystonia where two or more contiguous parts of the body are affected. On the contrary, when two non-contiguous parts are affected it is known as multifocal dystonia. In the first patient, the neck is deviated to the left, right sternomastoid is prominent, and there is grimacing while speaking. Lingual dystonia is also evident. This is a variety of primary dystonia caused by DYT1 or Torsin 1A gene mutation on chromosome 9. The 2nd, 3rd, and 4th video shows ‘sensory trick’ or ‘geste antagonistique’, whereas in the 1st patient, severe retrocollis induced by focal dystonia of the extensors of the neck is relieved on touching the back of the head with the palm, whereas in the other patients, torticollis to the right is equally relieved by the same maneuver, a classical sign of primary dystonia.