Extended Data Figure 4: Directional and velocity sampling in square and circular enclosures.
From: Grid cell symmetry is shaped by environmental geometry
a, b, Mean directional (left) and velocity (right) sampling in square (a) and circular (b) enclosures. c, d, Typical examples of directional (left) and velocity (right) sampling profiles in square (c) and circle (d). e, Directional sampling in the left (left, black) and right (right, blue) parts of the trapezoid. The directional sampling in the left part of the trapezoid was significantly more biased than in the right (P = 0.01; two-sample t-test; means ± s.e.m. = 0.025 ± 0.004 (left) and 0.012 ± 0.002 (right). f, The velocity sampling bias was also significantly larger in the left part of the trapezoid (left, black) than the right (right, blue) (P = 0.006; two-sample t-test; mean velocity sampling ± s.e.m. = 9,803 ± 791 (cm/s)2 (left) and 5,413 ± 1,176 (cm/s)2 (right). g, h, Typical examples of the directional sampling (g) and velocity sampling (h) on the 2 sides of the trapezoid; rat 2104. The left side trapezoid direction circular score is 0.035 (black), the right, 0.009 (blue). The left side trapezoid velocity circular score is 8,268 (cm/s)2 (black) and the right, 3,904 (cm/s)2 (blue). i, j, Absence of a significant correlation ρ between the similarities of the left and right sides of the trapezoid and the difference in directional (i), P = 0.22 or velocity (j) scores, P = 0.82.
