The Brain's GPS

University of California, San Diego, Studies: Researchers report they have discovered precisely timed electrical oscillations in neuronal “grid cells.” Located in the brain near the hippocampus, these grid cells allow you to navigate through your physical environment by maintaining an internal hexagonal representation. Much like a CPS, the brain’s navigation system for the external world requires precisely timed pulses. Oscillatory patterns act as an internal clock that keeps tabs on where you are and when.

http://findingthemind.wordpress.com/2011/04/30/hippocampus/

http://www.kurzweilai.net/like-gps-the-brains-navigation-system-for-the-external-world-requires-precisely-timed-pulses