M. PALESTINI AND W. LIFSCHITZ 



427 



40msec 



Vi 





100 >jV 



60msec 



Fig. 7 



Oscillographic recording of primary cortical photic responses 

 Stinuihis: flash i/scc. Bipolar electrodes. Five responses in each trace. 



A. Cat unanaesthetizcd, chronically implanted and dark-adapted. 



B. Same cat after midpontine section. Amplification and sweep rate 



as in A. 



C. Same condition as in B, but sweep rate has been slowed to show 



the last deflection. 



