Extended Data Figure 5: Schematic representation of grid re-alignment in different shape enclosures.
From: Grid cell symmetry is shaped by environmental geometry
a, The relative orientation of two representative grid modules in a square. The grid cell with the smaller scale (green) is aligned ∼9° from the horizontal wall and the grid cell with the larger scale (blue) is aligned ∼9° from the vertical wall with the relative orientation between them equal to 30°. b, If grid cells respond independently and if the geometry of the environment determines their orientation in non-polarized environments such as a circular enclosure, grid cells in a should randomly realign (in the current example by ∼15°). c, Similarly, in the hexagonal enclosure both grid cells should start to align (left) or become ∼18° offset from each other (right). This was not observed in our experimental data. d, Simultaneously recorded grid cells from two different modules (rat r2183) in a square (left), a circle (middle) and a hexagon (right) maintained their relative orientation. Rate maps are shown on the top row and spatial autocorrelograms on the bottom.
