The whole blood/brain barrier topic is puzzling.  From the research of
Y. Omura MD, it is clear that the brains of many patients are infected
with bacteria and viruses and also have deposits of various metals,
including aluminum and lead.  

An interesting article some years ago -- Readers' Digest? -- discussed a
case in which a child died of a worm in the brain.  Infection came from
stool left in the sandbox by a relative from a rural area;  the worm
normally is confined to the bowel.   Weirdly, the surgeon who treated
the child noted the smell of feces in the cranium which he opened to
relieve pressure.   He convinced himself he was wrong;  couldn't be
true. 

He was right, as autopsy proved after the child's death some time later,
following many periods of "recovery."    

Based on my reading,  the blood/brain barrier keeps blood out of the
brain under ordinary circumstances, but may be breached for a variety of
reasons.  

Omura claims methods to chelate heavy metals from the brains, and
destroy toxins as well.   There are many abstracts available online for
free, and full articles from MedLine at modest cost.   Omura's work is a
good place to start reading about this topic. 



Marshall Dudley wrote:
> 
> http://colloidalsilver.hypermart.net/silver/faq.html and
> http://educate-yourself.org/cs/csfaq.shtml and
> http://www.maccs.mq.edu.au/~stacey/colloidalsilver.htm and
> http://www.quantumbalancing.com/csfq.htm and
> http://www.n-ergetics.com/FAQ.html
> Silver can be toxic to nerve cells in the brain and spinal cord, but is 
> normally
> prevented from entering those areas by the blood-brain barrier.
> 
> Also interesting:
> http://www.cassia.org/library/Neurosci%20Lett%2C%2057%203%2C%201985%20Jun%2024%2C%20251-6.htm
> 
> http://sln.fi.edu/brain/lead/barrier.html
> 
> Maybe this one explains Rosemary's bizarre behavior:
> 
> http://www.cassia.org/library/Clin%20Neuropathol%2C%203%201%2C%201984%20Jan-Feb%2C%2032-6.htm
> 
> Ode Coyote wrote:
> 
> >    Autopsies have found silver in in the brain.
> >   Blood brain barrier?
> 
> And they has found aluminum in the brain as well in alheimizers patients, 
> although
> it is not suppose to cross the barrier either. That doesn't mean anything 
> except
> that the barrier was breached.  One of the above papers even mentions this.  
> Also
> there was a paper earlier that indicated that silver citrate has the ability 
> to
> cross the barrier, thus the recommendation on here before that one should not 
> mix
> CS with juice.
> 
> Silver in the brain causes psychosis and other neurological problems. There 
> best be
> a barrier or I would not be on the CS bandwagon.
> 
> Marshall
> 
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