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Eckert, Michael J.; Iyer, Kartik; Euston, David R.; Tatsuno, Masami – Learning & Memory, 2021
Neocortical sleep spindles have been shown to occur more frequently following a memory task, suggesting that a method to increase spindle activity could improve memory processing. Stimulation of the neocortex can elicit a slow oscillation (SO) and a spindle, but the feasibility of this method to boost SO and spindles over time has not been tested.…
Descriptors: Sleep, Memory, Cognitive Processes, Brain Hemisphere Functions
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Engin, Elif; Sigal, Maksim; Benke, Dietmar; Zeller, Anja; Rudolph, Uwe – Learning & Memory, 2020
Reduction in the expression or function of [alpha]5-subunit-containing GABA[subscript A] receptors ([alpha]5GABA[subscript A]Rs) leads to improvement in several hippocampus-dependent memory domains. However, studies thus far mostly lack anatomical specificity in terms of neuronal circuits and populations. We demonstrate that mice with a selective…
Descriptors: Brain Hemisphere Functions, Memory, Animals, Spatial Ability
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Murphy, Charlotte; Dehmelt, Vera; Yonelinas, Andrew P.; Ranganath, Charan; Gruber, Matthias J. – Learning & Memory, 2021
Curiosity states benefit memory for target information, but also incidental information presented during curiosity states. However, it is not known whether incidental curiosity-enhanced memory depends on when incidental information during curiosity states is encountered. Here, participants incidentally encoded unrelated face images at different…
Descriptors: Memory, Cognitive Processes, Incidental Learning, Learning Motivation
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Zhang, Mengting; Hupbach, Almut – Learning & Memory, 2020
In a 2014 issue of "Learning & Memory," Reagh and Yassa proposed that repeated encoding leads to semanticization and loss of perceptual detail in memory. We presented object images one or three times and tested recognition of targets and corresponding similar lures. Correct lure rejections after one in comparison to three exposures…
Descriptors: Cognitive Processes, Semantics, Memory, Recognition (Psychology)
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Keller, Nicole E.; Dunsmoor, Joseph E. – Learning & Memory, 2020
Counterconditioning (CC) is a form of retroactive interference that inhibits expression of learned behavior. But similar to extinction, CC can be a fairly weak and impermanent form of interference, and the original behavior is prone to relapse. Research on CC is limited, especially in humans, but prior studies suggest it is more effective than…
Descriptors: Conditioning, Fear, Memory, Learning Processes
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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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Vorster, Albrecht P. A.; Born, Jan – Learning & Memory, 2017
Sleep supports memory consolidation as shown in mammals and invertebrates such as bees and "Drosophila." Here, we show that sleep's memory function is preserved in "Aplysia californica" with an even simpler nervous system. Animals performed on an inhibitory conditioning task ("learning that a food is inedible") three…
Descriptors: Sleep, Inhibition, Operant Conditioning, Memory
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Sanders, Erin M.; Nyarko-Odoom, Akua O.; Zhao, Kevin; Nguyen, Michael; Liao, Hong Hong Liao; Keith, Matthew; Pyon, Jane; Kozma, Alyssa; Sanyal, Mohima; McHail, Daniel G.; Dumas, Theodore C. – Learning & Memory, 2018
N-methyl-D-aspartate receptors (NMDARs) at excitatory synapses are central to activity-dependent synaptic plasticity and learning and memory. NMDARs act as ionotropic and metabotropic receptors by elevating postsynaptic calcium concentrations and by direct intracellular protein signaling. In the forebrain, these properties are controlled largely…
Descriptors: Learning, Long Term Memory, Statistical Analysis, Spatial Ability
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MacQueen, David A.; Dalrymple, Savannah R.; Drobes, David J.; Diamond, David M. – Learning & Memory, 2016
Developed as a tool to assess working memory capacity in rodents, the odor span task (OST) has significant potential to advance drug discovery in animal models of psychiatric disorders. Prior investigations indicate OST performance is impaired by systemic administration of N-methyl-D-aspartate receptor (NMDA-r) antagonists and is sensitive to…
Descriptors: Short Term Memory, Animals, Drug Use, Psychiatry
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Tran, Tammy; Tobin, Kaitlyn E.; Block, Sophia H.; Puliyadi, Vyash; Gallagher, Michela; Bakker, Arnold – Learning & Memory, 2021
There has been considerable focus on investigating age-related memory changes in cognitively healthy older adults, in the absence of neurodegenerative disorders. Previous studies have reported age-related domain-specific changes in older adults, showing increased difficulty encoding and processing object information but minimal to no impairment in…
Descriptors: Aging (Individuals), Comparative Analysis, Cognitive Processes, Self Concept
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Leake, Jessica; Zinn, Raphael; Corbit, Laura; Vissel, Bryce – Learning & Memory, 2017
Rodents require a minimal time period to explore a context prior to footshock to display plateau-level context fear at test. To investigate whether this rapid fear plateau reflects complete memory formation within that short time-frame, we used the immediate-early gene product Arc as an indicator of hippocampal context memory formation-related…
Descriptors: Fear, Memory, Animals, Context Effect
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Marchal, Paul; Villar, Maria Eugenia; Geng, Haiyang; Arrufat, Patrick; Combe, Maud; Viola, Haydée; Massou, Isabelle; Giurfa, Martin – Learning & Memory, 2019
Honeybees are a standard model for the study of appetitive learning and memory. Yet, fewer attempts have been performed to characterize aversive learning and memory in this insect and uncover its molecular underpinnings. Here, we took advantage of the positive phototactic behavior of bees kept away from the hive in a dark environment and…
Descriptors: Inhibition, Learning Processes, Memory, Molecular Structure
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Zerbes, Gundula; Schwabe, Lars – Learning & Memory, 2019
Successful episodic memory requires binding of event details across spatial and temporal gaps. The neural processes underlying mnemonic binding, however, are not fully understood. Moreover, although acute stress is known to modulate memory, if and how stress changes mnemonic integration across time and space is unknown. To elucidate these issues,…
Descriptors: Spatial Ability, Stress Variables, Cognitive Processes, Memory
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Valle, Rebecca Della; Mohammadmirzaei, Negin; Knox, Dayan – Learning & Memory, 2019
Clinical and preclinical studies that have examined the neurobiology of persistent fear memory in posttraumatic stress disorder (PTSD) have focused on the medial prefrontal cortex, hippocampus, and amygdala. Sensory systems, the periaqueductal gray (PAG), and midline thalamic nuclei have been implicated in fear and extinction memory, but whether…
Descriptors: Stress Variables, Fear, Memory, Brain Hemisphere Functions
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Williams, Amy R.; Kim, Earnest S.; Lattal, K. Matthew – Learning & Memory, 2019
A fundamental property of extinction is that the behavior that is suppressed during extinction can be unmasked through a number of postextinction procedures. Of the commonly studied unmasking procedures (spontaneous recovery, reinstatement, contextual renewal, and rapid reacquisition), rapid reacquisition is the only approach that allows a direct…
Descriptors: Fear, Conditioning, Context Effect, Memory
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