Table 1.

Summary of the alignment between orientation, OD, and SF maps. The first four (Regions u–v) are shown in Fig. 2, in the same order. 1^st column: Six patches of cortex were imaged, identified in each row as regions ‘u–z’. 2^nd column: Animal the region was recorded in. 3^rd column: The preferred intersection angle between the gradients of the orientation and SF map (0°–90°). This is computed from the pixel-by-pixel distribution of intersection values. 4^th column: The preferred intersection angle between the gradients of the orientation and OD map (0°–90°). 5th column: The preferred intersection angle between the gradients of the SF and OD map (0°–90°). 6^th column: Correlation coefficient between log(SF) and |∇OD| at each pixel. Asterisk indicates p<10⁻¹⁰. 7^th column: Correlation coefficient between log(SF) and 1−|OD| at each pixel. Only region ‘z’ was not significant (p>0.05). 8^th column: Spatial period of the SF map (μm). 9th column: Spatial period of the OD map (μm). Note that the computed spatial period of the OD map is likely underestimated in instances where the imaged regions were smaller than the period of the map, thus yielding an underestimate of the ratio between the maps. For instance, region ‘y’ had a ratio near unity, in spite of a significantly positive correlation between SF and the OD metrics.

Imaging region	Animal ID	Preferred Ori-SF intersection ∠	Preferred Ori-OD intersection ∠	Preferred SF-OD intersection ∠	r SF vs. |∇OD|	r SF vs. 1-|OD|	SF period (μm)	OD period (μm)
u	1	86°	82°	2°	0.50*	0.33*	690	1140
v	2	82°	62°	23°	0.28*	0.19*	430	630
w	2	63°	85°	16°	0.28*	0.43*	580	960
x	2	83°	78°	25°	0.18*	0.13*	590	990
y	3	81°	87°	14°	0.41*	0.31*	596	600
z	4	86°	89°	28°	0.19*	0.006	686	880