Toby's My Baby,

It's called a Nerve Conduction Study. They take these tiny needles and put them in different spots and transmit electricity (not alot) to the nerve. It prints out the results on paper that pinpoints exactly what nerve is damaged. I had one a few years back because I was getting numbness and tingling in my hand. Turns out I've got a pinched nerve in my neck with major arthritic changes.