"By no means is he walking on his own, but the fact that he's beginning to activate the muscle again, like all of these changes, is a promising sign," said Dr. Kothari. "He's getting improved movement in his left arm. If we can get to the point he's using a joy stick, you don't have to have a lot of movement to operate a joy stick. Most of your arm can be paralyzed, but just move it. If he can move it enough and if his visual system is sufficient and his thinking and speed of processing, he could operate a motorized wheelchair."