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Direct linkMedina, Jorge H.; Izquierdo, Ivan; Cammarota, Martin; Bevilaqua, Lia R. M. – Learning & Memory, 2004
It has been suggested that retrieval during a nonreinforced test induces reconsolidation instead of extinction of the mnemonic trace. Reconsolidation would preserve the original memory from the labilization induced by its nonreinforced recall through a hitherto uncharacterized mechanism requiring protein synthesis. Given the importance that such a…
Descriptors: Inhibition, Animal Behavior, Biological Sciences, Behavioral Science Research
Gonzalez-Lima, F.; Bruchey, Aleksandra K. – Learning & Memory, 2004
We investigated whether postextinction administration of methylene blue (MB) could enhance retention of an extinguished conditioned response. MB is a redox compound that at low doses elevates cytochrome oxidase activity, thereby improving brain energy production. Saline or MB (4 mg/kg intraperitoneally) were administered to rats for 5 d following…
Descriptors: Memory, Pharmacology, Conditioning, Auditory Stimuli
Strausfeld, Nicholas J.; Pinter, Marianna; Lent, David D. – Learning & Memory, 2005
A unique behavioral paradigm has been developed for "Periplaneta americana" that assesses the timing and success of memory consolidation leading to long-term memory of visual-olfactory associations. The brains of trained and control animals, removed at the critical consolidation period, were screened by two-directional suppression subtractive…
Descriptors: Visual Perception, Neuropsychology, Neurology, Animal Behavior
Kamprath, Kornelia; Hermann, Heike; Lutz, Beat; Marsicano, Giovanni; Cannich, Astrid; Wotjak, Carsten T. – Learning & Memory, 2004
Cannabinoid receptors type 1 (CB1) play a central role in both short-term and long-term extinction of auditory-cued fear memory. The molecular mechanisms underlying this function remain to be clarified. Several studies indicated extracellular signal-regulated kinases (ERKs), the phosphatidylinositol 3-kinase with its downstream effector AKT, and…
Descriptors: Brain, Animals, Learning Processes, Animal Behavior
Messaoudi, Belkacem; Granjon, Lionel; Mouly, Anne-Marie; Sevelinges, Yannick; Gervais, Remi – Learning & Memory, 2004
The widely used Pavlovian fear-conditioning paradigms used for studying the neurobiology of learning and memory have mainly used auditory cues as conditioned stimuli (CS). The present work assessed the neural network involved in olfactory fear conditioning, using olfactory bulb stimulation-induced field potential signal (EFP) as a marker of…
Descriptors: Classical Conditioning, Animals, Auditory Stimuli, Cues
Ponnusamy, Ravikumar; Nissim, Helen A.; Barad, Mark – Learning & Memory, 2005
Extinction of conditioned fear in animals is the explicit model of behavior therapy for human anxiety disorders, including panic disorder, obsessive-compulsive disorder, and post-traumatic stress disorder. Based on previous data indicating that fear extinction in rats is blocked by quinpirole, an agonist of dopamine D2 receptors, we hypothesized…
Descriptors: Memory, Behavior Modification, Fear, Anxiety
