For neuro-anatomical terms, I usually refer to wikipedia or a brain image. One brain image I often look at is here:http://www.musckids.com/gs/TandPcontent ... eID=P07650
That webpage explains that supratentorial = cerebrum, or the front of the brain.
You probably know that "small vessel ischemic changes" refers to strokes.
I believe pontine = pons. It's on that brain image. The pons is part of the brain stem. The brain stem controls autonomic functions.