I don't want to confuse you, Jeza. I am bipolar but don't suffer the 'highs'. I only have depressive states followed by normalcy, which they call plateau.
I used to be on lithium, but came off it as it did nothing for my depression, I just lost my sense of humour, that's all. Some people could not live without lithium, ie: Spike Milligan.
Bipolar disorder has nothing to do with schizophrenia. They are totally different.
If you want to talk further about bipolar, I suggest you talk to wolf. She is on lithium and quite prepared to talk about it.
I've never been sectioned, but was hospitalised once, had brain scans, etc, and came out fine.
If you want to ask me anything, if I can help, I will.