Polymer nanowires threaded through the bloodstream may be a practical way to enter the cranium
Fiber to the brain
By threading nanowires through blood vessels in the neck, researchers hope to access the brain electrically and electronically without having to pierce the skull.
By: Willie D. Jones, IEEE’s Spectrum Issue Oct 2005

In a paper that appeared in the 5 July issue of The Journal of Nanoparticle Research, researchers from the New York University Medical Center, the Massachusetts Institute of Technology, and the University of Tokyo demonstrate how advances in nanotechnology could lead to a better way of getting into the brain. The team, led by Rodolfo Llinas, head of the department of physiology and neuroscience at the NYU Medical Center, in New York City, has devised a method for attaching electrodes to small clusters of brain cells—or even individual neurons—using the cardiovascular system as the conduit through which wires are threaded.
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