The newest issue of Science, Vol. 342, No. 6158, 1 Nov. 2013, has reports on recent research regarding the brain from pages 577-589. On page 579 is a reference on how to read on line the full article on which a one-page review summary is based. I would think the material is of most interest to those who are into the more technical side of the topic and who might be able to discern any specific application to handwriting and related expressive gestures.