Response of X and Y cat retinal ganglion cells to moving stimuli.
Single optic tract fibers in the cat were classified as X or Y cells by a contrast reversal stimulus. A slit of light was then moved across the receptive field at velocities from 10--1000 degrees/s. The preferred velocity was that velocity which elicited the strongest response from the cell. The maximum velocity was the highest velocity target to which a cell could respond. Y cells as a group both preferred and could follow faster targets than X cells, and were more broadly tuned to the preferrred velocity.
D000818:Animals; D002415:Cats; D009039:Motion Perception / Q000502:physiology*; D009431:Neural Conduction; D009474:Neurons / Q000145:classification / Q000502:physiology*; D012018:Reflex / Q000502:physiology; D012160:Retina / Q000166:cytology* / Q000502:physiology