Check out this fascinating article in The Week. Here is an excerpt;
University of Wisconsin psychologist Virginia Berninger tested students in grades 2, 4, and 6, and found that they not only wrote faster by hand than by keyboard — but also generated more ideas when composing essays in longhand. In other research, Berninger shows that the sequential finger movements required to write by hand activate brain regions involved with thought, language, and short-term memory.
To read the full article click here; The Week.