Some interesting research coming out of:
University College London with a/the research team being lead by:
Sarah-Jayne Blakemore.
Seems like her research is showing that:
When our brains issue a command to move a part of our bodies, two signals are sent. One goes to the brain regions that control the particular parts of the body that need to move, and another goes to regions that monitor the movements. It's all the same information sent to a different place.
Our brains then use this copy to predict what kind of sensation the action will produce. i.e., speaking will make us hear our own voice, reaching for a doorknob will make us feel the cold touch of brass, a flick of an eye will make objects appear to move across our field of vision,..etc....
If the actual sensation we receive does not closely match our prediction, our brains become aware of the difference.
The mismatch may make us pay more attention to what we are doing or prompt us to adjust our actions to get the results we want.
(think like---keeping our balance---while moving about---or moving our eyes correctly(predictably) as we move about---or---increasing the brain's use of processing commitment---when it becomes aware of a dfference---etc....)
And---if the sensation does not match our predictions at all, our brains interpret them as being caused by something other than ourselves.
(think like---people saying----its like its not me---feels "off", "strange" "a high", etc....)
Think back---to this post about cognitive research/results involving inner ear problems
located here
[url]http://www.healthboards.com/boards/showthread.php?t=218846&page=3&pp=5[/url]
....."Our hypothesis is that the reason you have this problem as a vestibular patient is that your brain stem is affected. The brain stem is a stalk connected to the spinal cord. There are nuclei located in the brain stem that attach to your balance system; they are also highly important for keeping your cortex, your thinking areas, alert and aroused and attentive.
Could it be that since you're constantly fighting the mismatch from your visual input and your disordered balance system that a very basic mechanism -- a mechanism that was developed as you learned to sit and crawl and that influenced how you later manipulated objects and then walked and spoke and thought, a mechanism that's taken for granted and built into very fundamental habits -- could it be that something that fundamental is being distorted? That the vestibular and visual disturbance interferes with nuclei functioning within the brain stem and thus interferes with your sequencing of information and impairs and reduces your channeling capacity?
It's an intriguing hypothesis, exceedingly difficult to test. Nevertheless it makes some sense, as anyone with a vestibular disorder can speak to. Basic problems with reading, watching letters transpose, problems with movement and the orienting to the environment -- these are manipulations of the environment that were learned at a very fundamental developmental stage."....
Maybe---they are getting closer...interesting...few would argue...that our vestibular system are---producting correct signals for the function:
...."Our brains then use this copy to predict what kind of sensation the action will produce"....
That's for sure!!!!!
Scott---u may be able to access the research via the Univ network...
Clues from Healthy Brains--AKA--Brain Fog--Scott 
