Rolling Thunder, what are you doing in the picture above me? I actually like it!
Do I win a prize if I guess right? You obviously got a hospital bracelet on so you would have been there overnight. There are more wires than electrodes so there are electrodes on your body that we cant see. So they are monitoring your brain activity, eye movements, heart rate and probably oxygen level, so my guess is it's either a sleep apnea test (to check how many times you stop breathing at night; and this is exactly how dude looked when he had his, I'm glad he could do his at home) -or perhaps a checkup to see if you need to do any changes regarding your vent.