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Miller, Dylan B.; Rassaby, Madeleine M.; Collins, Katherine A.; Milad, Mohammad R. – Learning & Memory, 2022
Fear is an adaptive emotion that serves to protect an organism against potential dangers. It is often studied using classical conditioning paradigms where a conditioned stimulus is paired with an aversive unconditioned stimulus to induce a threat response. Less commonly studied is a phenomenon that is related to this form of conditioning, known as…
Descriptors: Inhibition, Conditioning, Cues, Stimuli
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
Dunn, Tyler W.; Sossin, Wayne S. – Learning & Memory, 2021
A more thorough description of the changes in synaptic strength underlying synaptic plasticity may be achieved with quantal resolution measurements at individual synaptic sites. Here, we demonstrate that by using a membrane targeted genetic calcium sensor, we can measure quantal synaptic events at the individual synaptic sites of…
Descriptors: Neurological Organization, Animals, Measurement, Memory
Xu, Jiale; Casanave, Romelo; Guo, Su – Learning & Memory, 2021
Balancing exploration and anti-predation are fundamental to the fitness and survival of all animal species from early life stages. How these basic survival instincts drive learning remains poorly understood. Here, using a light/dark preference paradigm with well-controlled luminance history and constant visual surrounding in larval zebrafish, we…
Descriptors: Animals, Light, Visual Stimuli, Behavior
Ramey, Michelle M.; Yonelinas, Andrew P.; Henderson, John M. – Learning & Memory, 2020
When we look at repeated scenes, we tend to visit similar regions each time--a phenomenon known as "resampling." Resampling has long been attributed to episodic memory, but the relationship between resampling and episodic memory has recently been found to be less consistent than assumed. A possibility that has yet to be fully considered…
Descriptors: Memory, Eye Movements, Semantics, Visual Stimuli
Ammassari-Teule, Martine – Learning & Memory, 2020
Largely inspired from clinical concepts like brain reserve, cognitive reserve, and neural compensation, here we review data showing how neural circuits reorganize in presymptomatic and early symptomatic hAPP mice to maintain memory intact. By informing on molecular alterations and compensatory adaptations which take place in the brain before mice…
Descriptors: Brain, Cognitive Processes, Neurological Organization, Animals
Rogers, Jack T.; Cahill, Catherine M. – Learning & Memory, 2020
A set of common-acting iron-responsive 5'untranslated region (5'UTR) motifs can fold into RNA stem loops that appear significant to the biology of cognitive declines of Parkinson's disease dementia (PDD), Lewy body dementia (LDD), and Alzheimer's disease (AD). Neurodegenerative diseases exhibit perturbations of iron homeostasis in defined brain…
Descriptors: Neurological Impairments, Dementia, Brain, Cognitive Processes
Bergstrom, Hadley C.; Lieberman, Abby G.; Graybeal, Carolyn; Lipkin, Anna M.; Holmes, Andrew – Learning & Memory, 2020
Most experimental preparations demonstrate a role for dorsolateral striatum (DLS) in stimulus-response, but not outcome-based, learning. Here, we assessed DLS involvement in a touchscreen-based reversal task requiring mice to update choice following a change in stimulus-reward contingencies. In vivo single-unit recordings in the DLS showed…
Descriptors: Brain Hemisphere Functions, Stimuli, Responses, Learning Processes
Cho, Christina; Linster, Christiane – Learning & Memory, 2020
We present evidence that experience and cholinergic modulation in an early sensory network interact to improve certainty about olfactory stimuli. The data we present are in agreement with existing theoretical ideas about the functional role of acetylcholine but highlight the importance of early sensory networks in addition to cortical networks. We…
Descriptors: Olfactory Perception, Sensory Integration, Stimuli, Role
Denis, Dan; Schapiro, Anna C.; Poskanzer, Craig; Bursal, Verda; Charon, Lily; Morgan, Alexandra; Stickgold, Robert – Learning & Memory, 2020
Memory consolidation during sleep does not benefit all memories equally. Initial encoding strength appears to play a role in governing where sleep effects are seen, but it is unclear whether sleep preferentially consolidates weaker or stronger memories. We manipulated encoding strength along two dimensions--the number of item presentations, and…
Descriptors: Visualization, Memory, Sleep, Cognitive Processes
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
Ashton, Jennifer E.; Harrington, Marcus O.; Langthorne, Diane; Ngo, Hong-Viet V.; Cairney, Scott A. – Learning & Memory, 2020
Sleep deprivation increases rates of forgetting in episodic memory. Yet, whether an extended lack of sleep alters the qualitative nature of forgetting is unknown. We compared forgetting of episodic memories across intervals of overnight sleep, daytime wakefulness, and overnight sleep deprivation. Item-level forgetting was amplified across daytime…
Descriptors: Sleep, Health Behavior, Memory, Neurological Impairments