I'll call back later <a href="http://www.tuttifuori.net/how-long-for-zenerx-to-work-3485.pdf">zenerx comparison</a> The fantastic mechanical isolation of the brain in the skull, makes high impact maneuvers, like heading a soccer ball, routine for an organ that would otherwise barely hold up under its own weight. The downside of this level of protection is that accessing the brain for large scale activity recording is a difficult proposition. The current state of the art in simultaneous electrical recording is around 2,000 neurons. This was done by Miguel Nicolelis as part of his ambitious project to build a brain computer interface (BCI) that will be used by a paralyzed person to perform the opening kickoff in an upcoming World Cup soccer match.