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Life

Brain-cell grid gives references for mental maps

A previous version of this story incorrectly suggested that brain cells were arranged physically as a grid.

20 January 2010

A “GRID” of brain cells that helps us to navigate might explain why some people are better at finding their way around than others.

Rats have cells in their brains’ entorhinal cortex that appear to generate an internal grid of triangles, and which fire as the animals navigate around a space. Now and his colleagues at University College London have strong evidence for a similar grid of cells in humans.

In animals, implanted electrodes were used to measure the activity of individual grid cells directly, but this is not a practical option in humans. Instead, the team used…

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