Hi Savannah and Mike
Meant to give an answer to these postings ages ago, but I unfortunately had some bad news about my brother and had to go away to Brussels for his funeral. It's been a bit of a mixture really - very sad funeral, but we also managed to have a bit of a holiday while we were there. My brother, like my father, had early onset Alzheimer's, so neurological problems seem to be quite common in my family.
Forgot about the difference with UK weight measurements. It's 14 lbs to a stone, so that means my current weight of 10 stone 4 lbs is the same as 144 lbs. The weight I lost was approximately 2 stone, so 28 lbs.
Savannah, you asked about how there might be a link between AIWS and cholesterol. Well my understanding of AIWS is that it's caused by reduced blood flow and so reduced oxygen supply to areas of the brain which deal with processing visuo-spatial information. The main areas are Brodman's areas 39 and 40 which appear to deal with the long-term coding of spatial relationships, then there are Brodman's areas 18 and 19 which are involved with size processing and Brodman's area 7 which is activated when reaching for targets. In migraine, reduced blood flow and oxygen supply occurs when there is cortical spreading depression - a wave of depolarisation in the brain and migraine also tends to constrict and expand blood vessels. This is probably what was happening when I had intermittent attacks of AIWS.
For many years now, my AIWS has become permanent, so I have to assume that there are certain blood vessels which have either been considerably constricted, or else have become blocked in some way. Cholesterol is one possible contender for blocking blood vessels, though it could just be the wear and tear from having a lot of migraine attacks which is at the root of the problem.
My migraines proved to be mainly down to problems with grains - possibly including gluten sensitivity. Effects from gluten are another interesting factor, as migraine has been found to be associated with gluten in gluten sensitive people, in that it can produce cerebral calcification. Having said that, my MRI scan was completely normal, so it seems to be more a matter of some interruption in the blood supply, rather than any visible damage in the brain.
For me cutting down grains so I just eat oats and wild rice has been the way to avoid migraine attacks and I hardly ever get migraine nowadays. However the AIWS remains a mystery. I'm trying to do something about the raised cholesterol, as it's the only thing which is showing up on blood tests. Problem is there are so few papers on AIWS that it doesn't seem that much is known about it. I have asked for a SPECT scan in the past, as this concentrates more on blood flow, but apparently it's too expensive. Having a look at what is happening with me might be worthwhile for understanding AIWS, as I get it all the time, so there's no problem with trying to provoke it.
My own AIWS has come from chronic migraine problems, but some AIWS is down to other factors, such as inflammation from the Epstein Barr Virus and cerebral infarction - a form of stroke.
Maybe that helps to clarify things a bit, but I'm afraid I'm not making any progress in getting rid of the dratted condition.
Judy