I don't see it that way. As I see it, mind affects brain and brain affects mind. So while we are attached to our brain (still living) and under anesthesia, your brain is still working (is not compromised) but the anesthesia is affecting it in a way such that your consciousness is affected. Nobody would deny that doing certain things to the brain affects your consciousness. You also don't remember most of your dreams, but it doesn't mean that they don't happen. You can get hit over the head and lose memories of entire days. This is different than what you are talking about, as at least in my examples, we know the experiences existed before they were lost. But, again, we already know that taking certain drugs or doing different things to the brain can affect the quality of consciousness dramatically. That's not in contention. But this just shows that brain affects mind (and we know that mind affects brain, ie-the placebo affect). We can't say that anesthesia simply "wipes out consciousness" because we don't even know what consciousness is. But we can say that it affects the experience of the mind for the time being. But I think its a leap to suggest that the affects of anesthesia show that the brain is the same as the mind. It just shows what we already know, that brain affects mind. Especially when we have all these other data points which at least suggest that consciousness is seperate (although related to the brain). But these other events also seem to suggest that while we are related to our brains, we dont NEED our brain. I would say our brain needs our consciousness.