The test is very simple and you will have no problems with it.
Electrodes are place appropriately on the sites(arms & legs for example) to test certain nerves and then a slight jolt is applied similar to getting a shock when you walk across some carpets. The test is a snap and usually no harm will come to the patient.
I do want to caution you on making sure you have enough glucose in your system for the nerves to function as properly as they're going too. I went after work one time and my bgs was
in the process of being real low. The tech got no response which is impossible so she increased the intensity of the jolts 3 x on my right leg. There was damage caused where the electrode was placed and that spot doesn't feel as well as the rest of the leg although the rest of the leg isn't perfect either<smile>. This apparently can never happen or so I'm told but make sure your bg is good when you go so that it can't happen to you. I have no fear of getting the test done again and it does give them really important data
on your nervous system.
Come back and tell us after you've had the test what you thought of the procedure.