Just got turned on to a Discovery Channel blog by @mollywood, and came across this story.
My favorite quote is in the 6th paragraph:
The first is a woman who reported last month that, after her stroke at 64, she'd developed a "pale, milky-white and translucent third arm" that she uses to scratch itchy parts of her body, and cannot penetrate solid objects. It's the first recorded case of a person being able to feel, see and deliberately move a limb that doesn't exist. But get this: when they put her in an MRI and asked her to move her translucent arm, her brain responded in terms of both motor and visual activity: in terms of her conscious brain activity, she really is moving it, and can even look down and see it. I don't really have a point to make about that, but it's sort of awesome.
(emphasis is mine) I couldn't agree more.
