title: Non-linear spatial summation in cat retinal ganglion cells at different background levels.
mesh_terms: D000818:Animals; D002415:Cats; D005071:Evoked Potentials; D009474:Neurons / Q000502:physiology; D010775:Photic Stimulation / Q000379:methods; D012160:Retina / Q000502:physiology*; D009435:Synaptic Transmission; D014796:Visual Perception / Q000502:physiology