A vibrating pen "may be the key to improving the writing" of people with Parkinson's disease, said Lance Whitney at CNET.com. As Parkinson's progresses, patients' muscles seize up, which causes their handwriting to become increasingly small and cramped. The ARC pen, designed by British firm Dopa Solution, "uses high-frequency vibration to stimulate the muscles in the hand," giving patients the sensation of greater control and allowing them to produce clearer, larger writing.
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