Classical conditioning in the leech Macrobdella ditetra as a function of CS and UCS intensity.
D000818:Animals; D003214:Conditioning, Classical; D004597:Electroshock; D005108:Extinction, Psychological; D006799:Housing, Animal; D007865:Leeches / Q000502:physiology*; D009043:Motor Activity; D010775:Photic Stimulation