One more thing; my MLCer turned into a talker at ML. He's normally very quiet, and talks little (too little) about his feelings, like many men who end up stressed.
At ML, he told me details of his life I'd never heard before, along with a lot of emotions which seemed to bubble up from his subconscious. He treated me like his psychologist, actually, but seemed to have little awareness of my needs and feelings (loss of empathy). So, I got a lot of insight, because I listened actively, without showing my feelings when he was talking in this mode. (I did tell him what I thought at other times, and did everything we're advised not to do too... I'm human!)
It gave me a strong insight into his mind; his confusion, anguish, resentments, hopes, dreams... Notably, his sense of future was severely impaired. This, as people have found elsewhere, is a symptom of stress, as is the confusion.
He felt trapped by his life, and blamed me for it. He even told me he hated me (something he has no memory of now), and said the biggest mistake in his life was walking down the aisle with me. But he talked about all his life experiences and how they affected him, including going to military school age 9, his mother's attitude to him, his relationship and regrets with his father, who was violently killed.
I'd known for some years that he'd felt trapped and was stressed and unhappy. A lot of his stress reactions were how he reacted to life, and most certainly his perfectionist personality. So MLC was not a sudden event in his case.
He did change... But his changes were associated with escaping, with OW, his mirror narcisist, feeling happy in his escape. He did seem to have a lot of empathy for her, protecting her.
On the other hand, he was a boomerang. And actually I realized that he was dependent on me, emotionally, something he also blamed me for, as if I'd done it on purpose. When he had his second TGA episode, it wasn't OW he wanted, but me. When his TGA was over, he was off again. The best thing I did was to tell him to go, if he wanted to go. And to be independent myself. He realized what he wanted.
I'm not saying that all cases are like mine. I don't think all MLC is alike, with one pathway, although they share certain characteristics. However, I do have pretty good insight into what happened to my H. It clearly started with stress, which was greater because of his personality. He is who he is because of his development in the social world, so I cannot accept, in his case, that there was a unique neurological event in his case. I know there was not, but I also know that a person is not a fully aware, rational being, and the neurology of stress, meds, etc. has its effect.
If there are people here who, for any reason, find that there is no precursor, and that the flip is sudden, unexpected, and unexplainable in any other than a pure neurological event, that just goes to show how different all these cases are.
By the way, it might be interesting for some of you to read about the neuroscience of personality. It shows how a person develops neurologically as an adaptive response to the social world.
http://www.tc.umn.edu/~cdeyoung/Pubs/DeYoung_2010_personality_neuroscience_SPPC.pdf