Some time ago I started a thread about a guitar strummer for a friend who had a stroke. My friend could chord alright but the strum was way beyond his then current ability. The system I used involved using a Hi-Hat cymbol stand that activated a cable which worked a sliding carriage on the top of the guitar. The carriage held a pick.

For very rudimentary strumming this system worked fine. But as I suspected it quickly became a source of as much frustration as not being able to play. A system was designed at Duke university involing a similar process with ultimately the same results. I believe that this device is very possible but it would require the able hand to be used for strumming or finger picking and at the same time activating solenoids that replace the fretting hand and attached to the guitar neck. Still a limited success but one capable making real music. The cost is estimated in several thousands of dollars.

Altruism aside, the one handed guitar Strum-A-matiC will likely remain a theoretic probable until some one can come up with an affordable option.

Don