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Showing 1 to 15 of 201 results Save | Export
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Beamish, Sarah B.; Gross, Kellie S.; Anderson, McKenna M.; Helmstetter, Fred J.; Frick, Karyn M. – Learning & Memory, 2022
The ubiquitin proteasome system (UPS) is a primary mechanism through which proteins are degraded in cells. UPS activity in the dorsal hippocampus (DH) is necessary for multiple types of memory, including object memory, in male rodents. However, sex differences in DH UPS activation after fear conditioning suggest that other forms of learning may…
Descriptors: Gender Differences, Cognitive Processes, Animals, Memory
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Vasudevan, Krithika; Ramanathan, Karthik R.; Vierkant, Valerie; Maren, Stephen – Learning & Memory, 2022
Recent data reveal that the thalamic nucleus reuniens (RE) has a critical role in the extinction of conditioned fear. Muscimol (MUS) infusions into the RE impair within-session extinction of conditioned freezing and result in poor long-term extinction memories in rats. Although this suggests that RE inactivation impairs extinction learning, it is…
Descriptors: Brain Hemisphere Functions, Conditioning, Fear, Animals
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Oberländer, Kristin; Witte, Victoria; Mallien, Anne Stephanie; Gass, Peter; Bengtson, C. Peter; Bading, Hilmar – Learning & Memory, 2022
Differences in the learning associated transcriptional profiles between mouse strains with distinct learning abilities could provide insight into the molecular basis of learning and memory. The inbred mouse strain DBA/2 shows deficits in hippocampus-dependent memory, yet the transcriptional responses to learning and the underlying mechanisms of…
Descriptors: Learning, Memory, Animals, Research
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Nagayoshi, Taikai; Ishikawa, Rie; Kida, Satoshi – Learning & Memory, 2022
Fear generalization is one of the main symptoms of posttraumatic stress disorder. In rodents, the anterior cingulate cortex (ACC) and the hippocampus (HPC) control the expression of contextual fear memory generalization. Consistently, ACC projections to the ventral HPC contribute to contextual fear generalization. However, the roles of ACC…
Descriptors: Brain Hemisphere Functions, Fear, Generalization, Animals
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Briggs, Sherri B.; Hannapel, Reilly; Ramesh, Janavi; Parent, Marise B. – Learning & Memory, 2021
Research into the neural mechanisms that underlie higher-order cognitive control of eating behavior suggests that ventral hippocampal (vHC) neurons, which are critical for emotional memory, also inhibit energy intake. We showed previously that optogenetically inhibiting vHC glutamatergic neurons during the early postprandial period, when the…
Descriptors: Neurological Organization, Brain Hemisphere Functions, Inhibition, Energy
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Hernández-Matias, Arturo; Bermúdez-Rattoni, Federico; Osorio-Gómez, Daniel – Learning & Memory, 2021
It has been reported that during chemotherapy treatment, some patients can experience nausea before pharmacological administration, suggesting that contextual stimuli are associated with the nauseating effects. There are attempts to reproduce with animal models the conditions under which this phenomenon is observed to provide a useful paradigm for…
Descriptors: Context Effect, Animals, Drug Therapy, Brain Hemisphere Functions
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Martin, Kiley; Musaus, Madeline; Navabpour, Shaghayegh; Gustin, Aspen; Ray, W. Keith; Helm, Richard F.; Jarome, Timothy J. – Learning & Memory, 2021
Strong evidence supports a role for protein degradation in fear memory formation. However, these data have been largely done in only male animals. Here, we found that following contextual fear conditioning, females, but not males, had increased levels of proteasome activity and K48 polyubiquitin protein targeting in the dorsal hippocampus, the…
Descriptors: Fear, Memory, Gender Differences, Animals
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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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Costa, Renan M.; Baxter, Douglas A.; Byrne, John H. – Learning & Memory, 2020
Operant reward learning of feeding behavior in "Aplysia" increases the frequency and regularity of biting, as well as biases buccal motor patterns (BMPs) toward ingestion-like BMPs (iBMPs). The engram underlying this memory comprises cells that are part of a central pattern generating (CPG) circuit and includes increases in the intrinsic…
Descriptors: Memory, Brain Hemisphere Functions, Neurological Organization, Operant Conditioning
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da Silva, Thiago Rodrigues; Sohn, Jeferson Machado Batista; Andreatini, Roberto; Stern, Cristina Aparecida – Learning & Memory, 2020
Reconsolidation is a time-limited process under which reactivated memory content can be modified. Works focused on studying reconsolidation mainly restrict intervention to the moments immediately after reactivation and to recently acquired memories. However, the brain areas activated during memory retrieval depend on when it was acquired, and it…
Descriptors: Brain, Brain Hemisphere Functions, Fear, Memory
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Alexandrescu, Anamaria; Carew, Thomas J. – Learning & Memory, 2020
The spatial and temporal coordination of growth factor signaling is critical for both presynaptic and postsynaptic plasticity underlying long-term memory formation. We investigated the spatiotemporal dynamics of "Aplysia" cysteine-rich neurotrophic factor (ApCRNF) signaling during the induction of activity-dependent long-term…
Descriptors: Brain Hemisphere Functions, Memory, Spatial Ability, Sensory Integration
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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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Sathiyakumar, Sankirthana; Carrasco, Sofia Skromne; Saad, Lydia; Richards, Blake A. – Learning & Memory, 2020
Behavioral flexibility is important in a changing environment. Previous research suggests that systems consolidation, a long-term poststorage process that alters memory traces, may reduce behavioral flexibility. However, exactly how systems consolidation affects flexibility is unknown. Here, we tested how systems consolidation affects: (1)…
Descriptors: Memory, Animals, Rewards, Food
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Opalka, Ashley N.; Wang, Dong V. – Learning & Memory, 2020
Learning and memory involves a large neural network of many brain regions, including the notable hippocampus along with the retrosplenial cortex (RSC) and lateral septum (LS). Previous studies have established that the dorsal hippocampus (dHPC) plays a critical role during the acquisition and retrieval/expression of episodic memories. However, the…
Descriptors: Learning Processes, Memory, Brain Hemisphere Functions, Fear
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Haugland, Kamilla G.; Olberg, Anniken; Lande, Andreas; Kjelstrup, Kristen B.; Brun, Vegard H. – Learning & Memory, 2020
Growth hormone (GH) deficiency is associated with cognitive decline which occur both in normal aging and in endocrine disorders. Several brain areas express receptors for GH although their functional role is unclear. To determine how GH affects the capacity for learning and memory by specific actions in one of the key areas, the hippocampus, we…
Descriptors: Physiology, Aging (Individuals), Brain Hemisphere Functions, Learning
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