With something similar to this our stroke researchers should be able to identify and help those damaged neurons in the penumbra and bleed damage areas to complete health. I do not think small, if you think small you will never make a scientific breakthrough. Almost everyone in the stroke medical world is way too small-minded.
http://www.scientificamerican.com/article.cfm?id=scientists-develop-early-warning-system-for-alzheimers
A quick sniff of a nasal spray sends microscopic metal particles into
the brain, where they target and destroy the damaging proteins of
Alzheimer's disease. No Alzheimer's? No problem—the metal particles pass
out of the body safely. Such is the promise of technology being
developed by neuroscientist William Klein and nanotechnologist Vinayak
Dravid of Northwestern University. The pair has invented a
nanotech-based early-detection system that might one day deliver
targeted treatments.
Rest at the link.
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