Controlling a cursor with your brain? Yawn. Restoring movement to paralyzed mice? Color us unimpressed. Help a wheelchair-bound man walk again using only his thoughts? Now we're talking. That's the goal of researchers at the University of Michigan who have developed BioBolt, a (comparatively) noninvasive implant that rests on top of the cortex rather than penetrate it. The device is inserted through an easily-covered, dime-sized hole in the skull and feeds patterns from firing neurons to a computer using
