I'm going to go out on a limb here and say that with almost every kind of brain surgery or radiation, when a person gets tired, symptoms are much worse. Why I don't know, but my doctor agreed with this and basically said, "Well, that's just the way it is." The fog is probably due to your damaged vestibular system. This is from that article on how the balance system works, and I think you have read it before....but it's always good to read it again and be assured in some small way, that this all goes along with our balance system being out of whack. I still have some of these symptoms, 4 years after treatment. Maybe they will go away. Maybe they won't. They aren't very severe, but I notice a few things still. Hang in there, Nancy, as you are younger than me and you have a greater chance that these problems will smooth out over time.
Sue in Vancouver, USA
Unlikely as it seems, vestibular damage can cause memory problems. Here is why. When you damage your vestibular system, keeping your balance is now largely a conscious effort, not the automatic effortless procedure it once was. Consequently, those areas of your brain that you once just used for thought and memory, now must constantly work on keeping you balanced. As a result, your memory may suffer. You may grope for words when talking. You may easily forget what is being spoken about during a conversation. You may be easily distracted. You may have difficulty comprehending directions or instructions. You may have trouble concentrating and may feel disoriented at times.( I have this one on occasion!)
You may also experience fatigue because keeping your balance is now no longer a subconscious event, but something that you must consciously work hard to maintain. All this work makes you tired!
Vestibular damage may also give rise to muscular aches and pains. This is because when your vestibulo-spinal reflex no longer works automatically, you have to consciously control your balance by making your muscles rigid and less relaxed as you strain to keep your balance. In addition, you may get headaches and a stiff/sore neck from trying to hold your head absolutely still so you won't feel dizzy or nauseous.
Finally, damage to your vestibular system can include emotional problems such as anxiety, frustration, anger and depression. Your feelings of self-confidence and self-esteem may plummet. You may feel vaguely uneasy. You may feel that something is wrong or unreal without knowing why.
If you have a damaged vestibular system, you won't necessarily have all of the above symptoms, but you may experience many of them.
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