Retinotopic organization of the lateral suprasylvian area of the cat.

The retinotopic organization of the lateral suprasylvian area (L.S.A.) was investigated by microelectrode recording from single neurons. 560 penetrations were made on the medial and lateral banks of the middle suprasylvian sulcus (M.S.S.). The receptive field positions, of single neurons were mapped in relation to the retinal landmarks. A striking variability of the visuotopic organization from one animal to another was observed. The most persistent organization was the representation of the lower contralateral quadrant of the visual field in the rostra1 and middle parts of the L.S.A. and a slight shift to the upper contralateral quadrant of the visual field in the posterior regions of the L.S.A.