Table 2.

Periodicity of orientation maps and feedback projections in V1

Mean cycle (mm) Mean axial specific cycle (mm)
Monkey Orientation maps Projections Orientation maps Projections
M1 0.594 0.512 0.564 0.470
M2 0.555 0.466 0.572 0.577
M3 0.676 0.595 0.571 0.479
M4 0.602 0.638 0.521 0.517
M5 0.582 0.616 0.477 0.430
M6 0.571 0.470 0.454 0.411
Mean ± SD 0.597 ± 0.042 0.550 ± 0.076 0.526 ± 0.052 0.481 ± 0.060

  • For each monkey, two autocorrelation functions were computed: one for the orientation map in V1 and the other for the feedback projections. The mean cycle length of the orientation map and feedback projections (2 middle columns) is the mean distance of the peaks in the corresponding autocorrelation function from the origin. For each axis, we considered the peak that was the closest to the central peak. The two columns to the right present the corresponding cycles along the axis of elongation of the feedback projections (see Fig. 12).