Table 2: Retinotopic Organization in Selected sROIs of the Mental Navigation Network.

sROIs Left hemisphere Right hemisphere
Vertices % Polar angle (mean ± s.d. °) Eccentricity (mean ± s.d. °) Vertices % % Polar angle (mean ± s.d. °) Eccentricity (mean ± s.d. °)
RSC 1303 70.5 27.8 ± 9.4 29.4 ± 3.4 1037 47.7 27.0 ±16.8 28.0 ± 3.8
PPA 537 48.8 29.6 ± 5.1 23.6 ± 1.9 360 35.6 25.6 ± 9.9 28.1 ± 4.7
OPA 1297 83.8 21.6 ± 14.0 29.8 ± 4.3 1880 51.9 18.0 ± 25.2 30.2 ± 4.8
PCu 1420 89.4 -4.7 ± 7.1 28.7 ± 2.9 1823 97.1 -9.1 ± 13.3 29.3 ± 2.8
aIPS 1627 37.5 -11.1 ± 9.6 34.0 ± 1.6 1265 34.4 -28.1 ± 11.1 34.9 ± 0.9

Note: For each sROI, the percentage indicates vertices activated on both polar-angle and eccentricity maps. For the purpose of these measurements, PCu refers only to the posterior precuneus region (yellow contour) visible on the medial wall in Fig. 4. s.d., standard deviation.