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Direct linkKikas, Katarina; Westbrook, R. Frederick; Holmes, Nathan M. – Learning & Memory, 2021
Four experiments examined the effects of a dangerous context and a systemic epinephrine injection on sensory preconditioning in rats. In each experiment, rats were exposed to presentations of a tone and light in stage 1, light-shock pairings in stage 2, and test presentations of the tone alone and light alone in stage 3. Presentations of the tone…
Descriptors: Sensory Experience, Conditioning, Animals, Visual Stimuli
Scott, Gavin A.; Liu, Max C.; Tahir, Nimra B.; Zabder, Nadine K.; Song, Yuanyi; Greba, Quentin; Howland, John G. – Learning & Memory, 2020
Working memory (WM), the capacity for short-term storage of small quantities of information for immediate use, is thought to depend on activity within the prefrontal cortex. Recent evidence indicates that the prefrontal neuronal activity supporting WM is driven by thalamocortical connections arising in mediodorsal thalamus (mdThal). However, the…
Descriptors: Role, Animals, Brain Hemisphere Functions, Short Term Memory
Piantadosi, Patrick T.; Yeates, Dylan C. M.; Floresco, Stan B. – Learning & Memory, 2020
Fear can potently inhibit ongoing behavior, including reward-seeking, yet the neural circuits that underlie such suppression remain to be clarified. Prior studies have demonstrated that distinct subregions of the rodent medial prefrontal cortex (mPFC) differentially affect fear behavior, whereby fear expression is promoted by the more dorsal…
Descriptors: Learning Processes, Brain Hemisphere Functions, Fear, Conditioning
Liu, Rong-Yu; Neveu, Curtis; Smolen, Paul; Cleary, Leonard J.; Byrne, John H. – Learning & Memory, 2017
Developing treatment strategies to enhance memory is an important goal of neuroscience research. Activation of multiple biochemical signaling cascades, such as the protein kinase A (PKA) and extracellular signal-regulated kinase (ERK) pathways, is necessary to induce long-term synaptic facilitation (LTF), a correlate of long-term memory (LTM).…
Descriptors: Drug Therapy, Biochemistry, Pharmacology, Intervention
Leaderbrand, Katherine; Chen, Helen J.; Corcoran, Kevin A.; Guedea, Anita L.; Jovasevic, Vladimir; Wess, Jurgen; Radulovic, Jelena – Learning & Memory, 2016
Understanding how episodic memories are formed and retrieved is necessary if we are to treat disorders in which they malfunction. Muscarinic acetylcholine receptors (mAChR) in the hippocampus and cortex underlie memory formation, but there is conflicting evidence regarding their role in memory retrieval. Additionally, there is no consensus on…
Descriptors: Memory, Recall (Psychology), Brain Hemisphere Functions, Pharmacology
Graham, Bronwyn M.; Richardson, Rick – Learning & Memory, 2016
These experiments examined the relationship between the neurotrophic factor fibroblast growth factor 2 (FGF2) and individual differences in the expression of conditioned fear. Experiments 1 and 2 demonstrated that rats naturally expressing low levels of contextual or cued fear have higher levels of hippocampal FGF2 relative to rats that express…
Descriptors: Individual Differences, Correlation, Fear, Animals
