EVIDENCE FOR EFFERENCE COPY FOR EYE MOVEMENTS IN FISH

1. 1. Common goldfish at rest move their eyes back and forth in the horizontal plane in a series of regular saccadic steps, three or four forward and the same number back. 2. 2. Microelectrode recordings from the tectal commissure show two kinds of response in time with eye movement, one of which is a sensory evoked response, while the other appears to be neither sensory nor motor. 3. 3. This paper discusses the latter response in relation to the general problem of distinguishing movement in the visual environment from apparent movement generated by displacement of the eye. © 1969.