Take a look at my recent post on the Technology-Supported Human-World Interaction blog about an article written by Desney Tan and his colleagues. Their recent research focused on the development and user-testing of a muscle-computer interface.
I think that the muCI system holds promise for children, teens, and adults who have special needs. I believe that this sort of interface will prove to useful in healthcare, education, homes, and community spaces, if it allows for interaction and interoperability with the technologies that people encounter in their daily lives.
This was cross-posted on the TechPsych blog.