Fig. 2: The stratum calcarinum (SC).
From: Occipital Intralobar fasciculi: a description, through tractography, of three forgotten tracts

a Sagittal slice showing the right SC (red) curved around the calcarine fissure. b Coronal slice showing the left and right SC. c, d The two layers of the SC. The deeper and longer layer (orange) lies under the more superficial and u-shaped layer (red). Where they intersect is shown in bright yellow.