title: Differential effects of stimulus size on "on" and "off" responses of superior collicular neurons.
mesh_terms: D000818:Animals; D006224:Cricetinae; D004056:Differential Threshold; D005071:Evoked Potentials; D009474:Neurons / Q000502:physiology; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time; D013477:Superior Colliculi / Q000166:cytology / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*