Fig. 1.

Monocular stimulation of the contra- and ipsilateral eye produces different activity patterns in cat area 17.A–H, Iso-orientation maps obtained after monocular stimulation with gratings of four different orientations. Thedark patches denote regions that were activated by the respective stimulus. Active regions in the contralateral 135° map shown in D were outlined and transferred to the corresponding ipsilateral map in H to facilitate comparison. Both maps are clearly different, thus suggesting also a segregation according to ocular dominance. I, Cortical blood vessel pattern of the imaged region. A, Anterior;P, posterior; M, medial;L, lateral. Scale bar, 1 mm.