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Briskin-Luchinsky, Valeria; Tam, Shlomit; Shabbat, Schlomit; Hurwitz, Itay; Susswein, Abraham J. – Learning & Memory, 2018
A learning experience may lead to changes in behavior during the experience, and also to memory expressed at a later time. Are signals causing changes in behavior during the learning experience related to the formation and expression of memory? We examined this question, using learning that food is inedible in "Aplysia." Treatment of an…
Descriptors: Memory, Behavior Change, Animals, Food
Colon, Lorianna; Odynocki, Natalie; Santarelli, Anthony; Poulos, Andrew M. – Learning & Memory, 2018
Development and sex differentiation impart an organizational influence on the neuroanatomy and behavior of mammalian species. Prior studies suggest that brain regions associated with fear motivated defensive behavior undergo a protracted and sex-dependent development. Outside of adult animals, evidence for developmental sex differences in…
Descriptors: Gender Differences, Brain Hemisphere Functions, Fear, Behavior
Ahmadiantehrani, Somayeh; Gores, Elisa O.; London, Sarah E. – Learning & Memory, 2018
Nonassociative learning is considered simple because it depends on presentation of a single stimulus, but it likely reflects complex molecular signaling. To advance understanding of the molecular mechanisms of one form of nonassociative learning, habituation, for ethologically relevant signals we examined song recognition learning in adult zebra…
Descriptors: Habituation, Associative Learning, Correlation, Singing
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
Briskin-Luchinsky, Valeria; Levy, Roi; Halfon, Maayan; Susswein, Abraham J. – Learning & Memory, 2018
Training "Aplysia" with inedible food for a period that is too brief to produce long-term memory becomes effective in producing memory when training is paired with a nitric oxide (NO) donor. Lip stimulation for the same period of time paired with an NO donor is ineffective. Using qPCR, we examined molecular correlates of brief training…
Descriptors: Animals, Training, Food, Long Term Memory
Smedley, Elizabeth B.; Smith, Kyle S. – Learning & Memory, 2018
Sign-tracking is a form of autoshaping where animals develop conditioned responding directed toward stimuli predictive of an outcome even though the outcome is not contingent on the animal's behavior. Sign-tracking behaviors are thought to arise out of the attribution of incentive salience (i.e., motivational value) to reward-predictive cues. It…
Descriptors: Cues, Rewards, Persistence, Responses
Atlas, Lauren Y.; Phelps, Elizabeth A. – Learning & Memory, 2018
Fear-relevant stimuli such as snakes and spiders are thought to capture attention due to evolutionary significance. Classical conditioning experiments indicate that these stimuli accelerate learning, while instructed extinction experiments suggest they may be less responsive to instructions. We manipulated stimulus type during instructed aversive…
Descriptors: Fear, Stimuli, Hypothesis Testing, Visual Stimuli
Mei, Hao; Logothetis, Nikos K.; Eschenko, Oxana – Learning & Memory, 2018
Spatial navigation depends on the hippocampal function, but also requires bidirectional interactions between the hippocampus (HPC) and the prefrontal cortex (PFC). The cross-regional communication is typically regulated by critical nodes of a distributed brain network. The thalamic nucleus reuniens (RE) is reciprocally connected to both HPC and…
Descriptors: Spatial Ability, Brain Hemisphere Functions, Animals, Memory
Baggett, Vincent; Mishra, Aditi; Kehrer, Abigail L.; Robinson, Abbey O.; Shaw, Paul; Zars, Troy – Learning & Memory, 2018
Animals in a natural environment confront many sensory cues. Some of these cues bias behavioral decisions independent of experience, and action selection can reveal a stimulus-response (S-R) connection. However, in a changing environment it would be a benefit for an animal to update behavioral action selection based on experience, and learning…
Descriptors: Cues, Stimuli, Animal Behavior, Entomology
McHail, Daniel G.; Valibeigi, Nazanin; Dumas, Theodore C. – Learning & Memory, 2018
The neural bases of cognition may be greatly informed by relating temporally defined developmental changes in behavior with concurrent alterations in neural function. A robust improvement in performance in spatial learning and memory tasks occurs at 3 wk of age in rodents. We reported that the developmental increase of spontaneous alternation in a…
Descriptors: Spatial Ability, Memory, Animals, Brain Hemisphere Functions
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
Ocampo, Amber C.; Squire, Larry R.; Clark, Robert E. – Learning & Memory, 2018
Prior experience has been shown to improve learning in both humans and animals, but it is unclear what aspects of recent experience are necessary to produce beneficial effects. Here, we examined the capacity of rats with complete hippocampal lesions, restricted CA1 lesions, or sham surgeries to benefit from prior experience. Animals were tested in…
Descriptors: Prior Learning, Experience, Spatial Ability, Memory
Yu, Dinghui; Tan, Ying; Chakraborty, Molee; Tomchik, Seth; Davis, Ronald L. – Learning & Memory, 2018
The evolutionarily conserved Elongator Complex associates with RNA polymerase II for transcriptional elongation. Elp3 is the catalytic subunit, contains histone acetyltransferase activity, and is associated with neurodegeneration in humans. Elp1 is a scaffolding subunit and when mutated causes familial dysautonomia. Here, we show that…
Descriptors: Olfactory Perception, Animals, Genetics, Memory
Travaglia, Alessio; Steinmetz, Adam B.; Miranda, Janelle M.; Alberini, Christina M. – Learning & Memory, 2018
Episodic memories in early childhood are rapidly forgotten, a phenomenon that is associated with "infantile amnesia," the inability of adults to remember early-life experiences. We recently showed that early aversive contextual memory in infant rats, which is in fact rapidly forgotten, is actually not lost, as reminders presented later…
Descriptors: Animals, Geographic Location, Learning, Memory
Bisby, Madelyne A.; Baker, Kathryn D.; Richardson, Rick – Learning & Memory, 2018
NMDA receptors (NMDARs) are considered critical for the consolidation of extinction but recent work challenges this assumption. Namely, NMDARs are not required for extinction retention in infant rats as well as when extinction training occurs for a second time (i.e., reextinction) in adult rats. In this study, a possible third instance of…
Descriptors: Fear, Learning Processes, Conditioning, Brain