title: Role of the optic ganglia in learning in the crayfish Procambarus clarki (Girard).
mesh_terms: D000818:Animals; D003445:Crustacea / Q000502:physiology*; D007858:Learning; D009900:Optic Nerve / Q000502:physiology*; D013539:Simian virus 40; D014785:Vision, Ocular