I was looking up information about loss of cervical disc space and came across an article talking about vascular insufficiency; listed a few symptoms like dizziness, drop attacks, black outs and stated something about the dizziness and black outs with sudden movements. I would like to know more, but cant find the article. I frequently get very dizzy, my eyes go black, and I fall down when I stand up. Can you tell me more about vascular insufficiency?