The features of the optic-nerve discharge underlying recurrent vision.

Abstract

A comparison was made of the results obtained from the observation of certain visual phenomena by human subjects, and the optic-nerve discharge obtained under similar stimulus conditions in animal subjects. The specific stimulus was a flash of light which was systematically varied in duration from a few msecs. up to i sec. and in intensity from a very feeble pulse to one quite bright. Within this range of intensity and duration, the effects produced both in visual sensation and in the nerve discharge underwent parallel changes. This is to say that the characteristics of the nerve discharge are reflected in sensation. The nerve-discharge records provide a basis for classifying certain phenomena as after-images.