Researchers have identified

navigation systems by scanning the brains of volunteers as they watched a video filmed on the streets of London

brain scans revealed the GPS function of the brain that underlie our decisions as we navigate to a destination.

two areas of the brain seem to take turns as our inner guide and work together to lead us through the environment. Brain regions assume different functions to meet our needs, keeping track of the distance to our destination in a straight line and the other chipped in calculating the actual distance of the way when it comes to a crossroads.

Researchers have identified the neural systems by scanning the brains of volunteers while they watched films on the streets of Soho in London.

"We never heard of how the brain represents information about the places we want to be the future," said Hugo Spiers, a neuroscientist at the Institute of Neuroscience behavioral, University College London.

"We did not know if the brain has tried to follow a straight line distance to the goal and got to minimize the distance, or if the brain uses the actual path you intend. "

To elucidate how to navigate, Lorelei Spiers and colleague Howard first gave cards Soho volunteers for the study and led to a two-hour tour of the region, during which sought to learn the streets and the location of 23 bars, shops and cafes. After the workout, they sat an examination to ensure he had learned about the area.

For the next phase of the experiment, scientists had a crew of walking around the Soho cinema in the early hours of a summer morning in the first person to capture images of streets and routes between many institutions.

volunteers took turns to put in a magnetic resonance imaging (fMRI) scanner watching movies on a screen in front of them. When the film began, the street name that has appeared next to a picture of the bar or the store that had come.

During the experiment, the scientists stopped the film every time a cross appeared and asked the volunteers what path to take. I did not know is that the films were adjusted to follow the fastest route most of the time, and to divert them to others.

"If a bar is very close and get away, the activity in front of the ramp and the hippocampus and in the run-down," said Spiers.

But monitoring the straight line distance from one place to another was only half the picture. When people make decisions about which path to take, he hired the back of the hippocampus, apparently, the calculation of the new road and its length.

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