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Schultz, Heidrun; Yoo, Jungsun; Meshi, Dar; Heekeren, Hauke R. – Learning & Memory, 2022
The medial temporal lobe (MTL), including the hippocampus (HC), perirhinal cortex (PRC), and parahippocampal cortex (PHC), is central to memory formation. Reward enhances memory through interplay between the HC and substantia nigra/ventral tegmental area (SNVTA). While the SNVTA also innervates the MTL cortex and amygdala (AMY), their role in…
Descriptors: Memory, Cognitive Processes, Brain, Brain Hemisphere Functions
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
Sayegh, Fares; Herraiz, Laurie; Colom, Morgane; Lopez, Sébastien; Rampon, Claire; Dahan, Lionel – Learning & Memory, 2022
Dopamine participates in encoding memories and could either encode rewarding/aversive value of unconditioned stimuli or act as a novelty signal triggering contextual learning. Here we show that intraperitoneal injection of the dopamine D1/5R antagonist SCH23390 impairs contextual fear conditioning and tone-shock association, while intrahippocampal…
Descriptors: Cognitive Processes, Memory, Fear, Conditioning
Kodirov, Sodikdjon A.; Bonni, Kathrin; Wehrmeister, Michael; Lutz, Beat – Learning & Memory, 2021
The depolarization is also important for the short-term synaptic plasticity, known as depolarization-induced suppression of excitation (DSE). The two major types of neurons and their synapses in the lateral nucleus of amygdala (LA) are prone to plasticity. However, DSE in interneurons has not been reported in amygdala in general and in LA in…
Descriptors: Brain Hemisphere Functions, Cytology, Drug Use, Comparative Analysis
Schultz, Heidrun; Sommer, Tobias; Peters, Jan – Learning & Memory, 2022
During associative retrieval, the brain reinstates neural representations that were present during encoding. The human medial temporal lobe (MTL), with its subregions hippocampus (HC), perirhinal cortex (PRC), and parahippocampal cortex (PHC), plays a central role in neural reinstatement. Previous studies have given compelling evidence for…
Descriptors: Brain Hemisphere Functions, Word Recognition, Recall (Psychology), Cognitive Processes
Hellerstedt, Robin; Talmi, Deborah – Learning & Memory, 2022
Reward is thought to attenuate forgetting through the automatic effect of dopamine on hippocampal memory traces. Here we report a conceptual replication of previous results where we did not observe this effect of reward. Participants encoded eight lists of pictures and recalled picture content immediately or the next day. They were informed that…
Descriptors: Rewards, Recall (Psychology), Brain Hemisphere Functions, Memory
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
Gobin, Christina; Wu, Lizhen; Schwendt, Marek – Learning & Memory, 2020
The delayed match-to-sample task (DMS) is used to probe working memory (WM) across species. While the involvement of the PFC in this task has been established, limited information exists regarding the recruitment of broader circuitry, especially under the low- versus high-WM load. We sought to address this question by using a variable-delay…
Descriptors: Animals, Short Term Memory, Brain Hemisphere Functions, Training
Jordan, Jake T.; Tong, Yi; Pytte, Carolyn L. – Learning & Memory, 2022
Plasticity is a neural phenomenon in which experience induces long-lasting changes to neuronal circuits and is at the center of most neurobiological theories of learning and memory. However, too much plasticity is maladaptive and must be balanced with substrate stability. Area CA3 of the hippocampus provides such a balance via hemispheric…
Descriptors: Spatial Ability, Brain Hemisphere Functions, Memory, Learning Processes
Gemzik, Zachary M.; Donahue, Margaret M.; Griffin, Amy L. – Learning & Memory, 2021
Spatial working memory (SWM) is the ability to encode, maintain, and retrieve spatial information over a temporal gap, and relies on a network of structures including the medial septum (MS), which provides critical input to the hippocampus. Although the role of the MS in SWM is well-established, up until recently, we have been unable to use…
Descriptors: Short Term Memory, Spatial Ability, Task Analysis, Cues
Robin, Jessica; Olsen, Rosanna K. – Learning & Memory, 2019
How do we form mental links between related items? Forming associations between representations is a key feature of episodic memory and provides the foundation for learning and guiding behavior. Theories suggest that spatial context plays a supportive role in episodic memory, providing a scaffold on which to form associations, but this has mostly…
Descriptors: Memory, Cognitive Processes, Association (Psychology), Inferences
Baram, Tallie Z.; Donato, Flavio; Holmes, Gregory L. – Learning & Memory, 2019
Spatial memory, the aspect of memory involving encoding and retrieval of information regarding one's environment and spatial orientation, is a complex biological function incorporating multiple neuronal networks. Hippocampus-dependent spatial memory is not innate and emerges during development in both humans and rodents. In children,…
Descriptors: Memory, Spatial Ability, Cognitive Processes, Neurological Organization
Vogel, Susanne; Kluen, Lisa Marieke; Fernández, Guillén; Schwabe, Lars – Learning & Memory, 2018
Prior knowledge, represented as a mental schema, has critical impact on how we organize, interpret, and process incoming information. Recent findings indicate that the use of an existing schema is coordinated by the medial prefrontal cortex (mPFC), communicating with parietal areas. The hippocampus, however, is crucial for encoding…
Descriptors: Stress Variables, Brain Hemisphere Functions, Cognitive Processes, Schemata (Cognition)
Aten, Sydney; Hansen, Katelin F.; Snider, Kaitlin; Wheaton, Kelin; Kalidindi, Anisha; Garcia, Ashley; Alzate-Correa, Diego; Hoyt, Kari R.; Obrietan, Karl – Learning & Memory, 2018
The microRNA miR-132 serves as a key regulator of a wide range of plasticity-associated processes in the central nervous system. Interestingly, miR-132 expression has also been shown to be under the control of the circadian timing system. This finding, coupled with work showing that miR-132 is expressed in the hippocampus, where it influences…
Descriptors: Neurology, Brain Hemisphere Functions, Memory, Animals
Snow, Wanda M.; Cadonic, Chris; Cortes-Perez, Claudia; Chowdhury, Subir K. Roy; Djordjevic, Jelena; Thomson, Ella; Bernstein, Michael J.; Suh, Miyoung; Fernyhough, Paul; Albensi, Benedict C. – Learning & Memory, 2018
The brain has a high demand for energy, of which creatine (Cr) is an important regulator. Studies document neurocognitive benefits of oral Cr in mammals, yet little is known regarding their physiological basis. This study investigated the effects of Cr supplementation (3%, w/w) on hippocampal function in male C57BL/6 mice, including spatial…
Descriptors: Energy, Brain Hemisphere Functions, Animals, Spatial Ability