Volunteers were given a series of half hour training sessions with a special
eye-reading device that "tricks" the brain into thinking it is
watching a moving object, allowing the patient enough control to trace
letters.
Jean Lorenceau, of Université Pierre et Marie Curie-Paris reported in the
Current Biology journal that after three to five training sessions
participants were able to draw digits or isolatated letters. With further
training, some were able to write words at a rate of 20-30 characters per
minute, similar to cursive handwriting.
The technique relies on an illusion caused by a flickering screen filled with
a random array of static discs varying in contrast.
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