Flash, with a single fiber EMG, the doctor puts the needle in, and then it stays in for about five minutes. During that time, he asks you to slightly clench a muscle and hold it clenched, while the machine collects the data. There are no shocks. Then he might move the needle to a different spot, and leave it there for five minutes, etc.

What makes this a bit confusing is that you may have had a regular EMG (with needles and shocks) in the same session. That's how they did mine--they gave me a regular EMG first and then moved on to the SFEMG.

Abby