title: Spatial integration in the crustacean visual system: peripheral and central sources of non-linear summation.
mesh_terms: D000200:Action Potentials; D000818:Animals; D003400:Astacoidea / Q000502:physiology*; D003623:Dark Adaptation; D009433:Neural Inhibition; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology*; D013028:Space Perception; D014794:Visual Fields