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Sekeres, Melanie J.; Moscovitch, Morris; Grady, Cheryl L.; Sullens, D. Gregory; Winocur, Gordon – Learning & Memory, 2020
Conditioned fear memories that are context-specific shortly after conditioning generalize over time. We exposed rats to a context reminder 30 d after conditioning, which served to reinstate context-specificity, and investigated how this reminder alters retrieval-induced activity in the hippocampus and anterior cingulate cortex (aCC) relative to a…
Descriptors: Memory, Animals, Brain Hemisphere Functions, Conditioning
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Pavesi, Eloisa; Heldt, Scott A.; Fletcher, Max L. – Learning & Memory, 2013
Experience-induced changes associated with odor learning are mediated by a number of signaling molecules, including nitric oxide (NO), which is predominantly synthesized by neuronal nitric oxide synthase (nNOS) in the brain. In the current study, we investigated the role of nNOS in the acquisition and retention of conditioned olfactory fear. Mice…
Descriptors: Memory, Generalization, Fear, Olfactory Perception
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Dunsmoor, Joseph E.; Mitroff, Stephen R.; LaBar, Kevin S. – Learning & Memory, 2009
The present study investigated the extent to which fear generalization in humans is determined by the amount of fear intensity in nonconditioned stimuli relative to a perceptually similar conditioned stimulus. Stimuli consisted of graded emotionally expressive faces of the same identity morphed between neutral and fearful endpoints. Two…
Descriptors: Experimental Groups, Stimuli, Conditioning, Generalization
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Krasnoff, Alan; Boswell, John J. – Psychological Reports, 1970
Descriptors: Behavioral Science Research, College Students, Comparative Analysis, Conditioning