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Jiang, Alice; Tran, Tammy T.; Madison, Farrah N.; Bakker, Arnold – Learning & Memory, 2019
Stress is a potent modulator of brain function and particularly mnemonic processes. While chronic stress is associated with long-term deficits in memory, the effects of acute stress on mnemonic functions are less clear as previous reports have been inconsistent. Some studies suggest that cortisol, a stress hormone that modulates biological changes…
Descriptors: Stress Variables, Mnemonics, Memory, Control Groups
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Cunningham, Tony J.; Leal, Stephanie L.; Yassa, Michael A.; Payne, Jessica D. – Learning & Memory, 2018
Stress influences how we remember emotional events and how these events shape future behaviors. However, the impact of stress on memory specificity for emotional events has yet to be examined. To this end, the present study utilized a mnemonic discrimination task that taxes hippocampal pattern separation, the process of distinguishing between…
Descriptors: Stress Variables, Brain Hemisphere Functions, Memory, Behavior Patterns
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Sinclair, Alyssa H.; Barense, Morgan D. – Learning & Memory, 2018
Through the process of "reconsolidation," reminders can temporarily destabilize memories and render them vulnerable to change. Recent rodent research has proposed that prediction error, or the element of surprise, is a key component of this process; yet, this hypothesis has never before been extended to complex episodic memories in…
Descriptors: Memory, Prediction, Error Patterns, Cues
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Boisselier, Lise; Ferry, Barbara; Gervais, Rémi – Learning & Memory, 2017
The hippocampal formation has been extensively described as a key component for object recognition in conjunction with place and context. The present study aimed at describing neural mechanisms in the hippocampal formation that support olfactory-tactile (OT) object discrimination in a task where space and context were not taken into account. The…
Descriptors: Animals, Role, Brain Hemisphere Functions, Olfactory Perception
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Felsenberg, Johannes; Plath, Jenny Aino; Lorang, Steven; Morgenstern, Laura; Eisenhardt, Dorothea – Learning & Memory, 2014
In classical conditioning, the temporal sequence of stimulus presentations is critical for the association between the conditioned stimulus (CS) and the unconditioned stimulus (US). In forward conditioning, the CS precedes the US and is learned as a predictor for the US. Thus it acquires properties to elicit a behavioral response, defined as…
Descriptors: Short Term Memory, Long Term Memory, Animals, Stimuli
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Bae, Sarah; Holmes, Nathan M.; Westbrook, R. Frederick – Learning & Memory, 2015
Four experiments used rats to study false context fear memories. In Experiment 1, rats were pre-exposed to a distinctive chamber (context A) or to a control environment (context C), shocked after a delay in a second chamber (context B) and tested either in B or A. Rats pre-exposed to A froze just as much as control rats in B but more than control…
Descriptors: Laboratory Experiments, Memory, Fear, Animals
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Vecsey, Christopher G.; Park, Alan J.; Khatib, Nora; Abel, Ted – Learning & Memory, 2015
Sleep deprivation (SD) following hippocampus-dependent learning in young mice impairs memory when tested the following day. Here, we examined the effects of SD on remote memory in both young and aged mice. In young mice, we found that memory is still impaired 1 mo after training. SD also impaired memory in aged mice 1 d after training, but, by a…
Descriptors: Sleep, Memory, Neurological Impairments, Animals
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Reichelt, Amy C.; Morris, Margaret J.; Westbrook, Reginald Frederick – Learning & Memory, 2016
High sugar diets reduce hippocampal neurogenesis, which is required for minimizing interference between memories, a process that involves "pattern separation." We provided rats with 2 h daily access to a sucrose solution for 28 d and assessed their performance on a spatial memory task. Sucrose consuming rats discriminated between objects…
Descriptors: Animals, Spatial Ability, Control Groups, Memory
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Schmidt, Pia-Isabell; Rosga, Kristin; Schatto, Celina; Breidenstein, Anja; Schwabe, Lars – Learning & Memory, 2014
Memory can be distorted by misleading post-event information. These memory distortions may have serious consequences, for example in eyewitness testimony. Many situations in which memory reports are solicited, and suggestive or misleading information is presented, are highly stressful for the respondent, yet little is known about how stress…
Descriptors: Stress Variables, Memory, Comparative Analysis, Experimental Groups
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Maroun, Mouna; Akirav, Irit – Learning & Memory, 2009
We investigated MEK and D1 receptors in the ventromedial prefrontal cortex (vmPFC) in consolidation and reconsolidation of recognition memory in rats nonhabituated to the experimental context (NH) or with reduced arousal due to extensive prior habituation (H). The D1 receptor antagonist enhanced consolidation and impaired reconsolidation in NH but…
Descriptors: Recognition (Psychology), Memory, Animals, Experiments
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Kwon, Jeong-Tae; Jhang, Jinho; Kim, Hyung-Su; Lee, Sujin; Han, Jin-Hee – Learning & Memory, 2012
Memory is thought to be sparsely encoded throughout multiple brain regions forming unique memory trace. Although evidence has established that the amygdala is a key brain site for memory storage and retrieval of auditory conditioned fear memory, it remains elusive whether the auditory brain regions may be involved in fear memory storage or…
Descriptors: Memory, Logical Thinking, Brain Hemisphere Functions, Fear
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Flavell, Charlotte R.; Lee, Jonathan L. C. – Learning & Memory, 2012
The basolateral amygdala (BLA) and the dorsal hippocampus (dHPC) are both structures with key roles in contextual fear conditioning. During fear conditioning, it is postulated that contextual representations of the environment are formed in the hippocampus, which are then associated with foot shock in the amygdala. However, it is not known to what…
Descriptors: Conditioning, Fear, Neurological Impairments, Context Effect
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Diaz-Ruiz, Oscar; Zhang, YaJun; Shan, Lufei; Malik, Nasir; Hoffman, Alexander F.; Ladenheim, Bruce; Cadet, Jean Lud; Lupica, Carl R.; Tagliaferro, Adriana; Brusco, Alicia; Backman, Cristina M. – Learning & Memory, 2012
In the present study, we analyzed mice with a targeted deletion of [beta]-catenin in DA neurons (DA-[beta]cat KO mice) to address the functional significance of this molecule in the shaping of synaptic responses associated with motor learning and following exposure to drugs of abuse. Relative to controls, DA-[beta]cat KO mice showed significant…
Descriptors: Animals, Career Development, Memory, Cognitive Processes
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Gamiz, Fernando; Gallo, Milagros – Learning & Memory, 2011
We have investigated the effect of protein kinase Mzeta (PKM[zeta]) inhibition in the basolateral amygdala (BLA) upon the retention of a nonspatial learned active avoidance response and conditioned taste-aversion (CTA) acquisition in rats. ZIP (10 nmol/[mu]L) injected into the BLA 24 h after training impaired retention of a learned…
Descriptors: Stimuli, Control Groups, Memory, Animals
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Lehmann, Hugo; McNamara, Kathryn C. – Learning & Memory, 2011
We examined whether repeated reactivations of a context memory would prevent the typical amnesic effects of post-training damage to the hippocampus (HPC). Rats were given a single contextual fear-conditioning session followed by 10 reactivations, involving a brief return to the conditioning context (no shock). Subsequently, the rats received sham…
Descriptors: Control Groups, Context Effect, Conditioning, Memory
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