WASHINGTON (AP) — Three people with a muscle-destroying disease destined to worsen got a little stronger – able to stand and walk more easily – when an implanted device zapped their spinal cord.

Colorado Rockies designated hitter Kris Bryant is scheduled to undergo a procedure on his balky back Thursday in Los Angeles.

But the addition of spinal navigation technology — like Google Maps, but for the body — has taken the procedure to the next level, doctors said."Infrared-guided trackers and 3D mapping allow ...