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22315.mpg12677KSegment 1. Movements were characterized by marked truncal flexion and slight jerks of the leg muscles associated with abdominal contractions, which suggested a propriospinal myoclonus. They worsened when the patient was lying down and were not triggered by any stimuli. Segment 2. Gentle self-rubbing of abdominal skin consistently suppressed the jerks. Another person could not reproduce this effect. Segment 3. The abdominal rhythmic contraction and its up and down propagation disappeared after abdominal transcutaneous electrical nerve stimulation (80 Hz, pulse width: 150 sec, 12 mA).

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