title: Extinction of an "inextinguishable" avoidance reaction in rats with respect to the timing of conditioned stimulus presentaton.
mesh_terms: D000818:Animals; D001362:Avoidance Learning; D003214:Conditioning, Classical; D004924:Escape Reaction; D005108:Extinction, Psychological; D008297:Male; D051381:Rats; D013997:Time Factors