Fascinating discussion, guys - and some thought-provoking articles.
You're right that many of us frequent this thread because we truly believe there's something organic going wrong / gone wrong in our MLC partner's heads. But like so many things in medicine, this too is likely multi-factorial. Was it exposure to stress hormones during their gestation? Their FOO troubles in childhood? Hormonal changes in mid-life? Possibly
yes to all of those things - any combination of which might've tipped an already overwhelmed, depressed person from the 'coping' column toward the maladaptive 'losing it' column.
I do suspect there's an underlying depressive component to MLC. So many of the affective symptoms of depression seem to reproduce themselves in the lead up to MLC (and also in the escape-avoid phase). That doesn't mean depression is the trigger - it could be all the other triggers create the maladaptive situation, and a situational depression is the result of that. The mix is explosive, though.
We really have no idea what areas of the brain are affected during MLC, but the ones that are, are not permanently affected, as they would be in psychopathy (or another personality disorder). Same for most mood disorders, they are not reversible (some types of depression are, by bipolar or schizophrenia aren't).
MLC is different. It is also different from conditions that permanently affect the brain. It is, for example, more similar to post-partum depression, since like post-partum depression, once it is gone, the person is back to normal.
Weight loss and or/endorphins would play a role in brain chemesty. Those two things provoke changes in the brain. Same for adrenaline. However, and unlike what people think, exercise alone does not solve depression, If it did there would be no depressed sports people, and there are. And, of course, MLCers who exercise would stop being depressed. They don't.
Some great points. There was a study I read recently (sorry, will post link if I can find it) comparing brain PET scans (measuring metabolic activity by brain region) from folks with post-partum depression, versus other depressions, while they were asked a series of diagnostic questions. PP depression was quite unique in the brain regions affected. Maybe that has something to do with its peculiar hormonal triggers, maybe reflects the violent speed at which thought processes get scrambled... and maybe holds some clue as to its reversibility. FWIW, it happened to remind me of the list of brain regions kikki mentioned, with respect to MLC thought process changes. Maybe PP depression and MLC have some commonalities?
Endorphins and adrenaline do seem to temporarily alleviate depressive symptoms - many athletes I know use the "runner's high" to pull themselves out of incipient depression. Some of our MLCers have tried the same (think frantic rat on treadmill), though I think in all cases it failed to work, at some point. Well, of course it did; because if exercise had served as a cure for our partners (instead of a temporary fix), guess we wouldn't be here on this board discussing it
That's just my two bits. I'd
love to see a brain PET scan of an MLCer... but then, there's just this little issue of research consent, which they'd all be highly unlikely to provide...
"You have a right to action, not to the fruit thereof; shoot your arrow, but do not look to see where it lands." -Bhagavad Gita