Spatial summation of inhibitory influences in the eye of Limulus, and the mutual interaction of receptor units.
D000200:Action Potentials; D000818:Animals; D003445:Crustacea; D006737:Horseshoe Crabs; D008027:Light; D009900:Optic Nerve / Q000502:physiology*; D010775:Photic Stimulation; D012160:Retina
CRUSTACEA; NERVES, OPTIC/physiology