Dizziness- Inability for eyes to track when there is head movement. You feel well....dizzy. Vertigo- Spin sensation when head is still. Of course nothing is spinning its your eyes jerking either mild or severe (barf bag time) Nuff said
I was under the impression that dizziness is when you brain is confused with the conflicting messages between you ear and eyes. Vertigo contains nystagmus, the violent involuntary eye movements. However, reading this thread complicates that theory because it does seem that the line between dizziness and vertigo is fuzzy at best.
I had my VNS and follow ups done at a teaching hospital. There are many student doctors to see before seeing the top dog. Every single one of them tried to tell me there are only two types of dizziness. Either you are lightheaded and feel like you might pass out or you are having a spinning sensation. To them, dizzy and vertigo are the same thing. I disagree.
OK, here's what Wikipedia has to say about it. One can induce dizziness by engaging in disorientating activities such as spinning. Vertigo is the sensation of spinning or having one's surroundings spin about them. Many people find vertigo very disturbing and often report associated nausea and vomiting. It represents about 25% of cases of occurrences of dizziness.[5] Disequilibrium is the sensation of being off balance, and is most often characterized by frequent falls in a specific direction. This condition is not often associated with nausea or vomiting. Presyncope is lightheadedness, muscular weakness and feeling faint as opposed to a syncope, which is actually fainting. Non-specific dizziness is often psychiatric in origin. It is a diagnosis of exclusion and can sometimes be brought about by hyperventilation.[4] A stroke is the cause of isolated dizziness in 0.7% of people who present to the emergency room.[5]
As I said near the beginning. Critical to understanding dizziness/vertigo is to understand the actual physiological mechanism at play. Otherwise we're just throwing our favorite gut-feel terms around. There's an article on dizziness, if I recall, by the New England Journal of Medicine. You won't get more authoritative than that. You have to pay for it. When I'm better I plan on reading it and like Moses will lead us out of this confusional slavery.