I recall something from biology class (and I'll tread lightly here, 'cause I didn't pay much attention this/last term -- in fact I haven't gone to class in 3 weeks and I'm skipping my final 'cause I'll fail anyways), but I recall something about sensory perception, and how some areas/parts of our body (or limbs, I suppose you could say) have "strange" sensory pathways from the location of where the sense perception occurs, in relation to other completely different locations. Which is due to the fact (actually, don't take it as fact 'cause I'm spit-balling here) that different senses, or areas of our body in which sense occurs, are received/registered in similar locations of our brain. So I *think* it's possible for it to sometimes be mixed up? Because from a sensory receptor (wherever in our body, we have so many nerves) travels from that location to the spinal cord, and depending on the kind of feeling, can either be relayed right back to the initial location, or to the brain. I'll try and think about it more. I wish I could find the actual textbook chapter.