title: Relaxation and fear as determinants of maintained avoidance in rats.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001362:Avoidance Learning; D001522:Behavior, Animal; D004597:Electroshock; D004777:Environment; D005108:Extinction, Psychological; D005239:Fear; D008297:Male; D051381:Rats; D011930:Reaction Time; D012063:Relaxation