Unoperated

In six unoperated animals, the ratio varied from 0.59 to 0.83 (mean ± SEM = 0.74 ± 0.02) (Fig. 2 B).

After diamidino yellow (DY) was injected in anteroventral portions of unilateral inferotemporal cortex, no labeled neurons were detected in the contralateral homotopic areas in the posterior-split preparation (Fig. 2 E), in marked contrast to the unoperated control (Fig. 2 F).