I'm out of state, and writing on my NOok tablet; so this is painful, but
Plasma Actuators.
Popular Science, November 2015, page 26.
=)
Edit: searching to find this thread, I see
this has been discussed before.
In fact I was commenting on it
in this thread last July. The memory is the first to go. Or is it the knees?
Anyway, here's a Wikipedia entry on
Plasma Actuators