Extended Data Table 1. Statistical tests for data shown in Extended Data Fig. 4D.

Mean resultant length (MRL) and circular standard deviation (CSD) for real data and control data generated by randomly sampling from the V1 cell labeled field. For each case, we report the range of values for the control data, as well as the fraction of times MRL is larger and CSD smaller than the control data.

Case	MRL real data	Range of MRL for control data	CSD real data	Range of CSD for control data
MK373LH - 488	0.2 F(MRL>0. 2) = 0	0.01 – 0.17	1.79 F(CSD<1.79)= 0	1.88 – 3.02
MK373LH - 555	0.56 F(MRL>0.56) = 0	0.01 – 0.13	1.08 F(CSD<1.08)= 0	2.01 – 2.97
MK373LH-647A	0.32 F(MRL>0.32) = 0	0.05 – 0.1	1.52 F(CSD<1.52)= 0	2.14 – 2.47
MK368RH - 488	0.6 F(MRL>0.6) = 0	0.11 – 0.25	1.0 F(CSD<1.0) =0	1.65 – 2.09
MK365LH - 488	0.35 F(MRL>0.35) =0.003	0.03 – 3.37	1.46 F (CSD<1.46) = 0 .003	1.4 – 2.6
MK335LH - 488	0.27 F(MRL>0.27) = 0	0.0005 – 0.06	1.61 FCSD<1.61) = 0	2.40 – 3.91
MK335LH - 555	0.22 F(MRL>0.22) = 0	0.02 – 0. 13	1.74 F(CSD<1.74) =0	2.01 – 2.86