Receptive fields of single optic nerve fibers in a mammal with an all-cone retina. I: contrast-sensitive units.
D000221:Adaptation, Ocular; D000818:Animals; D009039:Motion Perception; D009900:Optic Nerve / Q000502:physiology*; D010786:Photoreceptor Cells / Q000502:physiology*; D012589:Sciuridae; D013238:Stereotaxic Techniques; D014794:Visual Fields; D014796:Visual Perception