SSEP, does it test trigeminal nerve?

My pain management doc wanted me to have a SSEP done on the trigeminal nerve.  I have never heard of this before, is it possible?  They called me when I got home and said that instead they were doing a neuro scan, what in the world is this?  Supposedly the nearby hospital doesn't do SSEP testing.  Does anyone know anything about this "scan?"  I'm a tad confused!!!!!  Neuro called today, BTW, all bloodwork was great she said.  She said that we'll go over it better at next visit on the 30th.  The Metanx that I have been taking for 2 1/2 weeks have really settled my legs down alot.  I have alot of energy now,  cleaned my entire basement yesterday, it took 10 hours.  I thought I'd be wiped out today, but I feel really great.  I still get the cold feeling in my face when I go to bed at night.  Its weird that it only happens at night, and not through the day at all.  Its always when I just start to try to relax and shut my eyes.  I am hoping that will go away also in time.  Thanks everyone for your time!!!