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Consolidation and generalisation across sleep depend on individual EEG factors and sleep spindle density Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2021-01-16 Alex Chatburn; Kurt Lushington; Mark J. Kohler
Sleep is involved in both the consolidation of discrete episodes, as well as the generalisation of acquired memories into schemata. Here, we have isolated early versus late periods of sleep in order to replicate previous behavioural findings and to demonstrate: i) that distinct sleep and sleep electroencephalography (EEG) factors influence the generalisation of learned information, and; ii) that the
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Acute exercise following skill practice promotes motor memory consolidation in Parkinson’s disease Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-22 Philipp Wanner; Martin Winterholler; Heiko Gaßner; Jürgen Winkler; Jochen Klucken; Klaus Pfeifer; Simon Steib
Acute cardiovascular exercise has shown to promote neuroplastic processes supporting the consolidation of newly acquired motor skills in healthy adults. First results suggest that this concept may be transferred to populations with motor and cognitive dysfunctions. In this context, Parkinson’s disease (PD) is highly relevant since patients demonstrate deficits in motor learning. Hence, in the present
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Consequence of stroke for feature recall and binding in visual working me Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2021-01-15 Selma Lugtmeijer; Sebastian Schneegans; Nikki A. Lammers; Linda Geerligs; Frank Erik de Leeuw; Edward H. F. de Haan; Paul M. Bays; Roy P. C. Kessels
Visual memory for objects involves the integration, or binding, of individual features into a coherent representation. We used a novel approach to assess feature binding, using a delayed-reproduction task in combination with computational modeling and lesion analysis. We assessed stroke patients and neurotypical controls on a visual working memory task in which spatial arrays of colored disks were
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Brd4 participates in epigenetic regulation of the extinction of remote auditory fear memory Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2021-01-15 Fu-Lian Huang; Fang Li; Wen-Juan Zhang; Song-Ji Li; Ze-Hua Yang; Tian-lun Yang; Jun Qi; Qiong Duan; Chang-Qi Li
Background Inaccurate fear memories can be maladaptive and potentially portrait a core symptomatic dimension of fear adaptive disorders such as post-traumatic stress disorder (PTSD), which is generally characterized by an intense and enduring memory for the traumatic events. Evidence exists in support of epigenetic regulation of fear behavior. Brd4, a member of the bromodomain and extra-terminal domain
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The role of p21-activated kinase in maintaining the fear learning-induced modulation of excitation/inhibition ratio in lateral amygdala Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2021-01-15 Blesson K Paul; Edi Barkai; Raphael Lamprecht
We study the relations between different learning paradigms and enduring changes in excitatory synaptic transmission. We here show that auditory fear conditioning (AFC), but not olfactory fear conditioning (OFC) training, led to enduring enhancement in AMPA-mediated miniature EPSCs (mEPSCs). Moreover, olfactory unpaired training led to a stable significant reduction in excitatory synaptic transmission
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Systemic HDAC3 inhibition ameliorates impairments in synaptic plasticity caused by simulated galactic cosmic radiation exposure in male mice Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-24 A.A. Keiser; E.A. Kramár; T. Dong; S. Shanur; M. Pirodan; N. Ru; M.M. Acharya; J.E. Baulch; C.L. Limoli; M.A. Wood
Deep space travel presents a number of measurable risks including exposure to a spectrum of radiations of varying qualities, termed galactic cosmic radiation (GCR) that are capable of penetrating the spacecraft, traversing through the body and impacting brain function. Using rodents, studies have reported that exposure to simulated GCR leads to cognitive impairments associated with changes in hippocampus
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Dorsomedial striatal contributions to different forms of risk/reward decision making Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-28 Jackson D. Schumacher; Mieke van Holstein; Vaishali Bagrodia; Hannah B. Le Bouder; Stan B. Floresco
Optimal decision making involving reward uncertainty is integral to adaptive goal-directed behavior. In some instances, these decisions are guided by internal representations of reward history, whereas in other situations, external cues inform a decision maker about how likely certain actions are to yield reward. Different regions of the frontal lobe form distributed networks with striatal and amygdalar
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Psychostimulants may block long-term memory formation via degraded sleep in healthy adults Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-21 Lauren N. Whitehurst; Sara C. Mednick
Sleep is vital for biological function and long-term memory formation, with preferential enhancement of emotionally laden content. A growing trend in healthy young adults is the non-medical use of psychostimulants, or “smart drugs”, to prevent sleep and, hopefully, enhance cognition. However, the effect of these drugs on sleep-dependent memory processes are unclear. Here, in a within-subject, double-blind
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Improving consolidation by applying anodal transcranial direct current stimulation at primary motor cortex during repetitive practice Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-19 Taewon Kim; Hakjoo Kim; David L. Wright
Engagement of primary motor cortex (M1) is important for successful consolidation of motor skills. Recruitment of M1 has been reported to be more extensive during interleaved compared to repetitive practice and this differential recruitment has been proposed to contribute to the long-term retention benefit associated with interleaved practice. The present study administered anodal direct current stimulation
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Age- and sex-specific fear conditioning deficits in mice lacking Pcdh10, an Autism Associated Gene Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-16 Sarah L. Ferri; Holly C. Dow; Hannah Schoch; Ji Youn Lee; Edward S. Brodkin; Ted Abel
PCDH10 is a gene associated with Autism Spectrum Disorder. It is involved in the growth of thalamocortical projections and dendritic spine elimination. Previously, we characterized Pcdh10 haploinsufficient mice (Pcdh10+/- mice) and found male-specific social deficits and dark phase hypoactivity. Pcdh10+/- males exhibit increased dendritic spine density of immature morphology, decreased NMDAR expression
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Sustained and transient gray matter volume changes after n-back training: A VBM study Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-19 Anna Miró-Padilla; Elisenda Bueichekú; Jesús Adrián-Ventura; Víctor Costumero; María-Ángeles Palomar-García; Esteban Villar-Rodríguez; Lidón Marin-Marin; Naiara Aguirre; César Ávila
Working memory training causes functional adaptations in the brain, which include changes in activation and functional connectivity that remain stable over time. Few studies have investigated gray matter (GM) changes after working memory training, and they have produced heterogeneous results without clarifying the stable effects of training. The present study was designed to test for sustained and
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Ketamine anesthesia enhances fear memory consolidation via noradrenergic activation in the basolateral amygdala Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-15 Maria Morena; Paola Colucci; Giulia F. Mancini; Valentina De Castro; Andrea Peloso; Gustav Schelling; Patrizia Campolongo
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Effects of aversive conditioning on expression of physiological stress in honey bees (Apis mellifera) Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-15 Timothy E. Black; Ova Fofah; Christopher W. Dinges; Carlos A. Ortiz-Alvarado; Arian Avalos; Yarira Ortiz-Alvarado; Charles I. Abramson
Stress is defined as any deviation from an organism’s baseline physiological levels. Therefore, introduction of new stimuli and information, such as in learning, can be defined as a stressor. A large body of research exists examining the role that stress plays in learning, but virtually none addresses whether or not learning itself is a measurable cause of stress. The current study used a wide variety
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Chemogenetic silencing of hippocampus and amygdala reveals a double dissociation in periadolescent obesogenic diet-induced memory alterations Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-02 Fabien Naneix; Ioannis Bakoyiannis; Marianela Santoyo-Zedillo; Clémentine Bosch-Bouju; Gustavo Pacheco-Lopez; Etienne Coutureau; Guillaume Ferreira
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Ontogeny of spontaneous recognition memory in rodents Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-08 Arely Cruz-Sanchez; Jennifer Wilkin; Maithe Arruda-Carvalho
Spontaneous recognition memory tasks explore the what, where and when components of recognition memory. These tasks are widely used in rodents to assess cognitive function across the lifespan. While several neurodevelopmental and mental disorders present symptom onset in early life, very little is known about how memories are expressed in early life, and as a consequence how they may be affected in
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Integrity of the uncinate fasciculus is associated with emotional pattern separation-related fMRI signals in the hippocampal dentate and CA3 Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-04 Steven J. Granger; Stephanie L. Leal; Myra Saraí Larson; John T. Janecek; Liv McMillan; Hal Stern; Michael A. Yassa
Alterations in white matter integrity have been demonstrated in a number of psychiatric disorders involving emotional disruptions. One such pathway – the uncinate fasciculus – connects the orbitofrontal cortex (OFC) to the medial temporal lobes (MTL) and has been associated with early life adversity, maltreatment, anxiety, and depression. While it is purported to play a role in episodic memory and
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Critical role of hippocampal muscarinic acetylcholine receptors on memory reconsolidation in mice Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-09 M.C. Krawczyk; J. Millan; M.G. Blake; M.M. Boccia
Over the years, experimental and clinical evidence has given support to the idea that acetylcholine (Ach) plays an essential role in mnemonic phenomena. On the other hand, the Hippocampus is already known to have a key role in learning and memory. What is yet unclear is how the Ach receptors may contribute to this brain region role during memory retrieval. The Ach receptors are divided into two broad
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Pharmacological inhibition of phosphodiesterase 7 enhances consolidation processes of spatial memory Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-03 Susan McQuown; Dean Paes; Karsten Baumgärtel; Jos Prickaerts; Marco Peters
Augmentation of cAMP signaling through inhibition of phosphodiesterases (PDE) is known to enhance plasticity and memory. Inhibition of PDE4 enhances consolidation into memory, but less is known about the role of other cAMP specific PDEs. Here, we tested the effects of oral treatment with a selective inhibitor of PDE7 of nanomolar potency on spatial and contextual memory. In an object location task
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Disruption of rat deep cerebellar perineuronal net alters eyeblink conditioning and neuronal electrophysiology Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-04 Deidre E. O'Dell; Bernard G. Schreurs; Carrie Smith-Bell; Desheng Wang
The perineuronal net (PNN) is a specialized type of extracellular matrix found in the central nervous system. The PNN forms on fast spiking neurons during postnatal development but the ontogeny of PNN development has yet to be elucidated. By studying the development and prevalence of the PNN in the juvenile and adult rat brain, we may be able to understand the PNN’s role in development and learning
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Selective activation of the right hippocampus during navigation by spatial cues in domestic chicks (Gallus gallus) Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-23 Anastasia Morandi-Raikova; Uwe Mayer
In different vertebrate species, hippocampus plays a crucial role for spatial orientation. However, even though cognitive lateralization is widespread in the animal kingdom, the lateralization of this hippocampal function has been poorly studied. The aim of the present study was to investigate the lateralization of hippocampal activation in domestic chicks, during spatial navigation in relation to
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Neurobiological changes in striatal glutamate are associated with trait impulsivity of differential reinforcement of low-rate-response behavior in male rats Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-28 Chuen-Yu Chuang; Shang-Yueh Tsai; Shuo-Fu Chen; Yi-Hua Yang; Chih-Chang Chao; Nai-Shing Yen; Ruey-Ming Liao
Impulsive action can be measured using rat’s responses on a differential reinforcement of low-rate-response (DRL) task in which performance may be varied between rats. Nevertheless, neurobiological profiles underlying the trait impulsivity of DRL behavior remain largely unknown. Here, in vivo non-invasive proton magnetic resonance spectroscopy (1H-MRS) and Western blot assay were performed to assess
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Age-related alterations of default mode network in autobiographical memory: Recent versus remote events Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-21 Hong-Zhou Xu; Xiao-Xiao Xu; Xu Lei; Jing Yu
Previous studies have shown that the vividness of autobiographical memory decreases over time, and older adults often retrieve fewer details than young adults. However, the age-by-temporal distance (i.e., recent versus remote events) effect on autobiographical memory and underlying neural mechanisms are less understood. We recruited 25 young adults and 27 older adults to perform an fMRI-adapted autobiographical
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The association between sleep-wake ratio and overnight picture recognition is moderated by BDNF genotype Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-27 Risto Halonen; Liisa Kuula; Jari Lahti; Katri Räikkönen; Anu-Katriina Pesonen
A wealth of studies supports the role of sleep in memory performance. Experimentally controlled studies indicate that prolonged wake after memory encoding is detrimental for memory outcome whereas sleep protects from wake-time interference and promotes memory consolidation. We examined how the natural distribution of wake and sleep between encoding and retrieval associated with overnight picture recognition
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Frontal cortex stroke-induced impairment in spatial working memory on the trial-unique nonmatching-to-location task in mice Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-01 Josh Houlton; Deanna Barwick; Andrew N. Clarkson
Stroke-induced cognitive impairments are of significant concern, however mechanisms that underpin these impairments remain poorly understood and researched. To further characterise cognitive impairments in our frontal cortex stroke model, and to align our assessments with what is used clinically, we tested young C57BL/6J mice trained in operant touchscreen chambers to complete the trial-unique nonmatched-to-location
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Timing matters: Transcranial direct current stimulation after extinction learning impairs subsequent fear extinction retention Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-12-03 Luke J. Ney; Carmelo M. Vicario; Michael A. Nitsche; Kim L. Felmingham
Background Transcranial direct current stimulation (tDCS) has previously been shown to improve fear extinction learning and retention when administered prior to or during extinction learning. This study investigates whether tDCS immediately following extinction learning improves efficacy of extinction memory retention. Methods 30 participants completed a 2-day fear learning and extinction paradigm
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Motor learning rapidly increases synaptogenesis and astrocytic structural plasticity in the rat cerebellum Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-10 Morgan E. Stevenson; Amanda S. Nazario; Alicja M. Czyz; Heather A. Owen; Rodney A. Swain
Motor-skill learning is associated with cerebellar synaptogenesis and astrocytic hypertrophy, but most of these assessments of cerebellar ultrastructure have been completed after one month of training. After one month of training, the motor-skills necessary to complete these tasks have been acquired for weeks. This experiment aimed to characterize cerebellar ultrastructure during the acquisition phase
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Nucleus reuniens of the thalamus controls fear memory reconsolidation Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-23 Fernanda Troyner; Leandro Jose Bertoglio
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Increased dynamic flexibility in the medial temporal lobe network following an exercise intervention mediates generalization of prior learning Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-11-10 Neha Sinha; Chelsie N. Berg; Michael A. Yassa; Mark A. Gluck
Recent work has conceptualized the brain as a network comprised of groups of sub-networks or modules. “Flexibility” of brain network(s) indexes the dynamic reconfiguration of comprising modules. Using novel techniques from dynamic network neuroscience applied to high-resolution resting-state functional magnetic resonance imaging (fMRI), the present study investigated the effects of an aerobic exercise
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Acute exercise enhances fear extinction through a mechanism involving central mTOR signaling Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-17 Nicolette A. Moya; Margaret K. Tanner; Abigail M. Smith; Aleezah Balolia; Jazmyne K.P. Davis; Kelsey Bonar; Jennifer Jaime; Troy Hubert; Jorge Silva; William Whitworth; Esteban C. Loetz; Sondra T. Bland; Benjamin N. Greenwood
Impaired fear extinction, combined with the likelihood of fear relapse after exposure therapy, contributes to the persistence of many trauma-related disorders such as anxiety and post-traumatic stress disorder. Identifying mechanisms to aid fear extinction and reduce relapse could provide novel strategies for augmentation of exposure therapy. Exercise can enhance learning and memory and augment fear
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Social behavior in mice following chronic optogenetic stimulation of hippocampal engrams Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-22 Emily Doucette; Emily Merfeld; Heloise Leblanc; Amy Monasterio; Christine Cincotta; Stephanie L. Grella; Jesse Logan; Steve Ramirez
The hippocampus processes both spatial-temporal information and emotionally salient experiences. To test the functional properties of discrete sets of cells in the dorsal dentate gyrus (dDG), we examined whether chronic optogenetic reactivation of these ensembles was sufficient to modulate social behaviors in mice. We found that chronic reactivation of discrete dDG cell populations in male mice largely
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The role of dopamine D1 receptors in MDMA-induced memory impairments Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-06 Hanna Squire; Jiun Youn; Bart A. Ellenbroek; David N. Harper
(±) 3,4-Methylenedioxymethamphetamine (MDMA) is a recreationally abused psychostimulant that impairs memory performance. This effect is often attributed to a working memory impairment resulting from compromised serotonin systems. However, recent evidence from non-human animal experimental studies suggests that acute MDMA may indirectly impair memory performance through overstimulation of dopamine (DA)
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Guanfacine’s mechanism of action in treating prefrontal cortical disorders: Successful translation across species Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-17 Amy F.T. Arnsten
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Midbrain circuits of novelty processing Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-11 Andrew R. Tapper; Susanna Molas
Novelty triggers an increase in orienting behavior that is critical to evaluate the potential salience of unknown events. As novelty becomes familiar upon repeated encounters, this increase in response rapidly habituates as a form of behavioral adaptation underlying goal-directed behaviors. Many neurodevelopmental, psychiatric and neurodegenerative disorders are associated with abnormal responses to
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Cross-modal involvement of the primary somatosensory cortex in visual working memory: A repetitive TMS study Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-12 Giacomo Guidali; Camilla Roncoroni; Costanza Papagno; Nadia Bolognini
Recent literature suggests that the primary somatosensory cortex (S1), once thought to be a low-level area only modality-specific, is also involved in higher-level, cross-modal, cognitive functions. In particular, electrophysiological studies have highlighted that the cross-modal activation of this area may also extend to visual Working Memory (WM), being part of a mnemonic network specific for the
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A brief period of sleep deprivation negatively impacts the acquisition, consolidation, and retrieval of object-location memories Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-12 Pim R.A. Heckman; Femke Roig Kuhn; Peter Meerlo; Robbert Havekes
Memory is a cognitive concept and refers to the storage of information over a longer time period. It exists of a series of complementary processes; acquisition, consolidation, and retrieval. Each of these processes has its own partly unique neurobiological signature. Sleep deprivation is known to impair hippocampus-dependent long-term memories. Many studies have used extended periods of wakefulness
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Disconnection of the perirhinal and insular cortices severely disrupts taste neophobia Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-09 Juan M.J. Ramos
It is well known that the perirhinal (Prh) and insular (IC) cortices are reciprocally connected, mainly through ipsilateral projections. Although some studies have demonstrated that excitotoxic lesions to these regions, each separately, disrupt taste neophobia, it is not yet known whether the two regions have functional interactions with one another. To find out if they form a functional unit, we examined
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Neural synchronization between the anterior cingulate and orbitofrontal cortices during effort-based decision making Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-30 Zahra Fatahi; Ahmad Ghorbani; Mohammad Ismail Zibaii; Abbas Haghparast
Optimal decision making reflects the ability to choose the most advantageous option for various alternatives so that the anterior cingulate cortex is an important area involved in effort-based decision making. The current study aimed to investigate the functional connectivity between the ACC (anterior cingulate cortex) and the orbitofrontal cortex (OFC) during effort-based decision-making. A T-maze
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Early-life stress is associated with a preponderance of habitual responding in a novel instrumental avoidance learning paradigm Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-10-01 Alexander L. Gordon; Tara K. Patterson; Barbara J. Knowlton
There is substantial evidence linking early-life stress (ELS) to negative health outcomes in adulthood, including addiction. However, the neurocognitive and behavioral mechanisms through which ELS increases these risks remain unclear. To address this gap in knowledge, we developed a novel instrumental learning paradigm to explore the effects of ELS on the balance of habitual versus goal-directed learning
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Human-induced pluripotent stem cells as a model for studying sporadic Alzheimer’s disease Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-22 R.J.M. Riemens; G. Kenis; T. van den Beucken
The discovery of induced pluripotent stem cell (iPSC) technology has the potential to accelerate scientific research for Alzheimer’s disease (AD). iPSCs are therefore increasingly considered for AD modeling and drug development. Nevertheless, most of the work conducted so far has mainly focused on iPSC models from patients with familial AD (fAD), while actually sporadic AD (sAD) is more prevalent and
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Generalization and the hippocampus: More than one story? Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-30 Dagmar Zeithamova; Caitlin R. Bowman
Memory-based cognition depends on both the ability to remember specific details of individual experiences and the ability to combine information across experiences to generalize and derive new knowledge. A hippocampal role in rapid encoding of specific events is long established. More recent research also demonstrates hippocampal contributions to generalization, but their nature is still debated. The
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Using internal memory representations in associative learning to study hallucination-like phenomenon Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-30 Ming Teng Koh; Michela Gallagher
Studies of Pavlovian conditioning have enriched our understanding of how relations among events can adaptively guide behavior through the formation and use of internal mental representations. In this review, we illustrate how internal representations flexibly integrate new updated information in reinforcer revaluation to influence relationships to impact actions and outcomes. We highlight representation-mediated
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Repeated mild traumatic brain injuries impair visual discrimination learning in adolescent mice Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-25 Natalie J. Pinkowski; Juliana Guerin; Haikun Zhang; Sydney T. Carpentier; Kathryn E. McCurdy; Johann M. Pacheco; Carissa J. Mehos; Jonathan L. Brigman; Russell A. Morton
Cognitive deficits following a mild traumatic brain injury (mTBI) are common and are associated with learning deficits in school-age children. Some of these deficits include problems with long-term memory, working memory, processing speeds, attention, mental fatigue, and executive function. Processing speed deficits have been associated with alterations in white matter, but the underlying mechanisms
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Persistent Changes in Extracellular Lactate Dynamics Following Synaptic Potentiation. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-20 D Bingul,K Kalra,E M Murata,A Belser,M B Dash
A diverse array of neurometabolic coupling mechanisms exist within the brain to ensure that sufficient metabolite availability is present to meet both acute and chronic energetic demands. Excitatory synaptic activity, which produces the majority of the brain’s energetic demands, triggers a rapid metabolic response including a characteristic shift towards aerobic glycolysis. Herein, astrocytically derived
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Thalamic nucleus reuniens regulates fear memory destabilization upon retrieval. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-19 Fernanda Troyner,Leandro Jose Bertoglio
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Histone H2A.Z is required for androgen receptor-mediated effects on fear memory. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-08 Firyal Ramzan,Jennet Baumbach,Ashley D Monks,Iva B Zovkic
Epigenetic factors translate environmental signals into stable outcomes, but how they are influenced by regulators of plasticity remain unclear. We previously showed that androgen receptor overexpression inhibited fear memory in male mice and increased expression of the histone variant H2A.Z, a novel epigenetic regulator of memory. Here, we used conditional-inducible H2A.Z knockout mice to investigate
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Spatiotemporal pattern of brain electrical activity related to immediate and delayed episodic memory retrieval. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-02 Miguel Ángel Rivas-Fernández,Santiago Galdo-Álvarez,Montserrat Zurrón,Fernando Díaz,Mónica Lindín
In the present study we used the event-related brain potentials (ERP) technique and eLORETA (exact low-resolution electromagnetic tomography) method in order to characterize and compare the performance and the spatiotemporal pattern of the brain electrical activity related to the immediate episodic retrieval of information (words) that is being learned relative to delayed episodic retrieval twenty-minutes
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Involvement of noradrenergic and serotonergic systems in risk-based decisions between options of equivalent expected value in rats. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-02 Rui-Si Cui,Heng Ruan,Li-Yuan Liu,Xin-Wang Li
Risk perception is an important factor that may mediate risk-based decision-making processes regulated by noradrenergic (NA) and serotonergic (5-HT) systems. Most risk-based decision-making models involve complex factors, such as risk perception or reward value, such that the final decision is the result of the interactions among these factors. However, the contribution of risk perception per se in
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The critical role of the hippocampal NLRP3 inflammasome in social isolation-induced cognitive impairment in male mice. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-31 Lei Niu,Shi Shi Luo,Yang Xu,Zhen Wang,Dan Luo,Hui Yang,Wei Li,Jie He,Xiao Lin Zhong,Zheng Hai Liu,Jia Yu Zeng,Wen Yu Cao,Wei Wan
Early life stress exerts detrimental effects on cognitive function, but the mechanism by which this occurs is unknown. The NLRP3 inflammasome-mediated inflammatory response has emerged as a prominent contributor to cognitive impairment induced by chronic stress. In the present study, we showed that 8-week chronic social isolation (SI) led to cognitive impairment in mice, remarkably increasing expression
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Retrieval of allocentric spatial memories is preserved up to thirty days and does not require higher brain metabolic demands. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-09-03 Candela Zorzo,Jorge L Arias,Marta Méndez
Spatial orientation is a cognitive ability that is indispensable for survival. Several visual distal cues present in the context can be integrated, establishing a cognitive map. Although there is cumulative evidence about the neural substrate involved in spatial memory acquisition, the brain networks mediating the processes involved in the retrieval of allocentric spatial memories have been studied
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Amnesia for context fear is caused by widespread disruption of hippocampal activity. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-18 Jamie N Krueger,Jacob H Wilmot,Yusuke Teratani-Ota,Kyle R Puhger,Sonya E Nemes,Ana P Crestani,Marrisa M Lafreniere,Brian J Wiltgen
The hippocampus plays an essential role in the formation and retrieval of episodic memories in humans and contextual memories in animals. However, amnesia is not always observed when this structure is compromised. To determine why this is the case, we compared the effects of several different circuit manipulations on memory retrieval and hippocampal activity. Mice were first trained on context fear
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Brain-derived neurotropic factor and cortisol levels negatively predict working memory performance in healthy males. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-29 Luke Ney,Kim Felmingham,David S Nichols,Allison Matthews
There is now significant literature suggesting that increasing brain-derived neurotropic factor (BDNF) signalling may improve memory-related disorders such as Alzheimer’s disease. However, the effects of BDNF on short-term and working memory are not clear and existing evidence is inconsistent. Here we measured plasma BDNF and salivary cortisol levels, as well as working memory, on an N-Back task before
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Inhibition of brain 17β-estradiol synthesis by letrozole induces cognitive decline in male and female rats. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-31 Ladan Marbouti,Maryam Zahmatkesh,Esmail Riahi,Seyed Shahabeddin Sadr
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CaMKII antagonism in the ventral tegmental area impairs acquisition of conditioned approach learning in rats. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-25 Rudolf Nisanov,Eva Schelbaum,Debra Morris,Robert Ranaldi
This study investigated the role of calcium2+/calmodulin-dependent protein kinase II (CaMKII), a protein in the second messenger pathway of NMDA receptors, in the ventral tegmental area (VTA) in the acquisition and performance of conditioned approach learning. Male Long-Evans rats (N = 79) were exposed to 3 (to test acquisition) or 7 (to test performance) conditioning sessions in which they received
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The "implicit" serial reaction time task induces rapid and temporary adaptation rather than implicit motor learning. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-18 Olga Trofimova,Anaïs Mottaz,Leslie Allaman,Léa A S Chauvigné,Adrian G Guggisberg
The serial reaction time task (SRTT) has been widely used to induce learning of a repeated motor sequence without the participants’ awareness. The task has also been of major influence for defining current concepts of offline consolidation after motor learning. The present study intended to replicate previous findings in a larger population of 53 healthy individuals. We were unable to reproduce previous
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The development of a cognitive rehabilitation task for mice. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-09 Alexus Williams,Taylor Lowry,Catrina Sims-Robinson
Obesity, neurodegenerative diseases, and injury can all lead to cognitive deficits, which can be improved clinically with the implementation of cognitive rehabilitation. Due to a lack of effective cognitive rehabilitation tools in mice, we re-designed a cognitive task utilized to detect problem-solving deficits, to develop a cognitive rehabilitation paradigm for mice. In this study, we developed a
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Neurotrophins as a reliable biomarker for brain function, structure and cognition: A systematic review and meta-analysis. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-18 Grace M McPhee,Luke A Downey,Con Stough
Neurotrophins are signalling molecules involved in the formation and maintenance of synapses in the brain. They can cross the blood–brain barrier and be detected in peripheral blood, suggesting they may be a potential biomarker for brain health and function. In this review, the available literature was systematically searched for studies comparing peripheral neurotrophins levels with MRI and cognitive
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Stress drives deliberative tendencies by influencing vicarious trial and error in decision making. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-07-18 Seiichiro Amemiya,Maina Ishida,Natsuko Kubota,Takeshi Nishijima,Ichiro Kita
Previous studies have reported the effects of stress on decision making. However, the wide range of findings make it difficult to identify the fundamental effects of stress on decision making and, therefore, how stress affects decision making remains unknown. To investigate the influence of stress on decision making, we employed “vicarious trial and error” (VTE), which refers to a rat’s behavior of
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Exposure to elevated embryonic kynurenine in rats: Sex-dependent learning and memory impairments in adult offspring. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-07-30 Silas A Buck,Annalisa M Baratta,Ana Pocivavsek
Distinct abnormalities in kynurenine pathway (KP) metabolism have been reported in various psychiatric disorders, including schizophrenia (SZ). Kynurenic acid (KYNA), a neuroactive metabolite of the KP, is elevated in individuals diagnosed with SZ and has been linked to cognitive impairments seen in the disorder. To further understand the role of KYNA in SZ etiology, we developed a prenatal insult
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Deep brain stimulation and cognition: Translational aspects. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-07-31 Sarah Hescham,Huajie Liu,Ali Jahanshahi,Yasin Temel
Many neurological patients suffer from memory loss. To date, pharmacological treatments for memory disorders have limited and short-lasting effects. Therefore, researchers are investigating novel therapies such as deep brain stimulation (DBS) to alleviate memory impairments. Up to now stimulation of the fornix, nucleus basalis of Meynert and entorhinal cortex have been found to enhance memory performance
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The role of neuronal excitability, allocation to an engram and memory linking in the behavioral generation of a false memory in mice. Neurobiol. Learn. Mem. (IF 2.768) Pub Date : 2020-08-01 Jocelyn M H Lau,Asim J Rashid,Alexander D Jacob,Paul W Frankland,Daniel L Schacter,Sheena A Josselyn
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