Video 1
Before treatment: Male golfer, showing reduced control of his left arm as he is putting with only his left arm, putting from right to left. Phenomenology: Decreased motor control appears to be due to simultaneously increased tension of different antagonistic muscles of the left arm. This pattern of co-activation suggests a task-specific dystonia in his left arm while putting.
Video 2
After treatment: The same golfer showing normal motor control in his left arm while putting with only his left arm. Phenomenology: There is no movement disorder visible.
Video 3
Before treatment: Male billiard-player, demonstrating the inability to move the cue smoothly, back and forth, through the range of motion before hitting the ball. Phenomenology: There is no movement disorder visible.
Video 4
After treatment: Male billiard-player, demonstrating the normal pre-shot movements as he moves the cue smoothly, back and forth, through the range of motion before hitting the ball. Phenomenology: There is no movement disorder visible, but the difference with video 3 is striking.
Video 5
Before treatment: Female speed skater, showing a regular and patterned jerking movement in her right foot as she is skating in a straight line. The jerking movement consists of a sudden unconscious eversion of her foot that always occurrs at exactly the moment the skater’s skate was being placed back on the ice. Phenomenology: Decreased control appears to be due to repetitive jerking by simultaneously increased tension in different antagonistic muscles of the right leg followed by eversion of the right foot. This pattern of co-activation suggests a task-specific dystonia in her right foot while skating. Differential diagnoses: a task-specific myoclonus or functional movement disorder.
Video 6
After treatment: Same skater showing normal skating pattern in both legs while skating. Phenomenology: There is no movement disorder visible.