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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
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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
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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
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Bae, Sarah E.; Richardson, Rick – Learning & Memory, 2018
Recent studies have shown that exposure to a novel environment may stabilize the persistence of weak memories, a phenomenon often attributed to a process referred to as "behavioral tagging." While this phenomenon has been repeatedly demonstrated in adult animals, no studies to date have examined whether it occurs in infant animals, which…
Descriptors: Animals, Memory, Conditioning, Retention (Psychology)
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Hatakeyama, Taichi; Sugita, Manami; Yamada, Kazuo; Ichitani, Yukio – Learning & Memory, 2018
Temporal order memory was analyzed using a spontaneous object recognition (SOR) paradigm in rats. In SOR, animals were allowed to explore freely two or five different objects sequentially in the sample phase, and then, two different objects shown in the sample phase were simultaneously presented, and exploration time of object shown earlier…
Descriptors: Memory, Animals, Recognition (Psychology), Time
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Voulo, Meagan E.; Parsons, Ryan G. – Learning & Memory, 2017
Fear conditioning studies in rodents allow us to assess vulnerability factors which might underlie fear-based psychopathology such as post-traumatic stress disorder (PTSD). Despite PTSD being more prevalent in females than males, very few fear conditioning studies in rodents have tested females. Our study assessed fear conditioning and extinction…
Descriptors: Gender Differences, Retention (Psychology), Fear, Learning Processes
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Pezze, Marie A.; Marshall, Hayley J.; Fone, Kevin C. F.; Cassaday, Helen J. – Learning & Memory, 2017
Previous in vivo electrophysiological studies suggest that the anterior cingulate cortex (ACgx) is an important substrate of novel object recognition (NOR) memory. However, intervention studies are needed to confirm this conclusion and permanent lesion studies cannot distinguish effects on encoding and retrieval. The interval between encoding and…
Descriptors: Memory, Recall (Psychology), Retention (Psychology), Recognition (Psychology)
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Ferrer Monti, Roque I.; Giachero, Marcelo; Alfei, Joaquín M.; Bueno, Adrián M.; Cuadra, Gabriel; Molina, Victor A. – Learning & Memory, 2016
It is known that a consolidated memory can return to a labile state and become transiently malleable following reactivation. This instability is followed by a restabilization phase termed reconsolidation. In this work, we explored whether an unrelated appetitive experience (voluntary consumption of diluted sucrose) can affect a contextual fear…
Descriptors: Fear, Memory, Brain Hemisphere Functions, Genetics
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Poulos, Andrew M.; Mehta, Nehali; Lu, Bryan; Amir, Dorsa; Livingston, Briana; Santarelli, Anthony; Zhuravka, Irina; Fanselow, Michael S. – Learning & Memory, 2016
A prominent feature of fear memories and anxiety disorders is that they endure across extended periods of time. Here, we examine how the severity of the initial fear experience influences incubation, generalization, and sensitization of contextual fear memories across time. Adult rats were presented with either five, two, one, or zero shocks (1.2…
Descriptors: Conditioning, Fear, Generalization, Memory
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Huff, Mary L.; Emmons, Eric B.; Narayanan, Nandakumar S.; LaLumiere, Ryan T. – Learning & Memory, 2016
The basolateral amygdala (BLA) modulates memory consolidation for a variety of types of learning, whereas other brain regions play more selective roles in specific kinds of learning suggesting a role for differential consolidation via distinct BLA pathways. The ventral hippocampus (VH), an efferent target of the BLA, has been suggested to…
Descriptors: Memory, Learning Processes, Brain Hemisphere Functions, Animals
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Halverson, Hunter E.; Poremba, Amy; Freeman, John H. – Learning & Memory, 2015
Associative learning tasks commonly involve an auditory stimulus, which must be projected through the auditory system to the sites of memory induction for learning to occur. The cochlear nucleus (CN) projection to the pontine nuclei has been posited as the necessary auditory pathway for cerebellar learning, including eyeblink conditioning.…
Descriptors: Associative Learning, Auditory Stimuli, Retention (Psychology), Conditioning
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Antony, James W.; Paller, Ken A. – Learning & Memory, 2018
Repeatedly studying information is a good way to strengthen memory storage. Nevertheless, testing recall often produces superior long-term retention. Demonstrations of this testing effect, typically with verbal stimuli, have shown that repeated retrieval through testing reduces forgetting. Sleep also benefits memory storage, perhaps through…
Descriptors: Recall (Psychology), Sleep, Spatial Ability, Retention (Psychology)
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Weber, Frederik D.; Wang, Jing-Yi; Born, Jan; Inostroza, Marion – Learning & Memory, 2014
Research in rats using preferences during exploration as a measure of memory has indicated that sleep is important for the consolidation of episodic-like memory, i.e., memory for an event bound into specific spatio-temporal context. How these findings relate to human episodic memory is unclear. We used spontaneous preferences during visual…
Descriptors: Animals, Preferences, Memory, Sleep
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Zhang, Ming; Wang, Hongbing – Learning & Memory, 2013
There is significant interest in understanding the contribution of intracellular signaling and synaptic substrates to memory flexibility, which involves new learning and suppression of obsolete memory. Here, we report that enhancement of Ca[superscript 2+]-stimulated cAMP signaling by overexpressing type 1 adenylyl cyclase (AC1) facilitated…
Descriptors: Animals, Memory, Spatial Ability, Brain
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Giachero, Marcelo; Bustos, Silvia G.; Calfa, Gaston; Molina, Victor A. – Learning & Memory, 2013
The present study investigates the fear memory resulting from the interaction of a stressful experience and the retrieval of an established fear memory trace. Such a combination enhanced both fear expression and fear retention in adult Wistar rats. Likewise, midazolam intra-basolateral amygdala (BLA) infusion prior to stress attenuated the…
Descriptors: Memory, Fear, Interaction, Anxiety
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