The dark-discharge of the eye in the unrestrained cat

Summary The discharge of the ganglion cells of the retina of unrestrained cats in darkness (dark-discharge) has been recorded with large electrodes.Evidence is presented of sudden variations of the dark-discharge apparently spontaneous, as well of variations occurring concomitantly with the onset of the alert state of the animal.The research reported in this document has been sponsored by the Air Force Office of Scientific Research through the European Office of Aerospace Research, Oar, United States Air Force Grant AF Eoar 67-7 and by the Consiglio Nazionale delle Ricerche.