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"Memory retrieval"

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https://www.readbyqxmd.com/read/28723728/memory-related-functional-connectivity-in-visual-processing-regions-varies-by-prior-emotional-context
#1
Holly J Bowen, Elizabeth A Kensinger
Memory retrieval involves the reactivation of processes that were engaged at encoding. Using a Generalized Linear Model to test for effects of valence, our prior study suggests that memory for information previously encoded in a negative context reengages sensory processing regions at retrieval to a greater extent than positive. Here, we used partial least squares analyses of the same dataset to determine whether this valence-specific processing was one of the dominant patterns in the retrieval data. Trials previously paired with a face revealed a strong pattern of emotion that did not vary by valence, but for trials previously paired with a scene, an extensive network of regions was active during recollection of trials paired with negative content...
July 18, 2017: Neuroreport
https://www.readbyqxmd.com/read/28716589/the-role-of-dopamine-d2-receptors-in-the-nucleus-accumbens-during-taste-aversive-learning-and-memory-extinction-after-long-term-sugar-consumption
#2
María Isabel Miranda, José Alejandro Rangel-Hernández, Gabriela Vera-Rivera, Nadia Edith García-Medina, Gerardo Soto-Alonso, Gabriela Rodríguez-García, Luis Núñez-Jaramillo
The nucleus accumbens (NAcc) is a forebrain region that may significantly contribute to the integration of taste and visceral signals during food consumption. Changes in dopamine release in the NAcc have been observed during consumption of a sweet taste and during compulsive consumption of dietary sugars, suggesting that NAcc dopaminergic transmission is strongly correlated with taste familiarity and the hedonic value content. NAcc core and shell nuclei are differentially involved during and after sugar exposure and, particularly, previous evidence suggests that dopamine D2 receptors could be related with the strength of the latent inhibition (LI) of conditioned taste aversion (CTA), which depends on the length of the taste stimulus pre-exposure...
July 14, 2017: Neuroscience
https://www.readbyqxmd.com/read/28712947/cortical-dynamics-of-emotional-autobiographical-memory-retrieval-differ-between-women-and-men
#3
Joseph R Manns, Nicole L Varga, John B Trimper, Patricia J Bauer
Retrieval of autobiographical memories entails periods of search, access, and elaboration. Women's reports of their memories feature more detail and emotional content relative to men's. A key question is how these gender differences relate to unfolding changes in cortical activity during retrieval. We recorded EEG activity from 32 scalp electrodes as women and men were cued to retrieve positive, negative, and neutral autobiographical memories. Alpha (9-12Hz) oscillations were prominent at all EEG channels. Alpha coherence between channels was calculated as a measure of ms-level cortical synchrony...
July 13, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28710908/mental-reinstatement-of-encoding-context-improves-episodic-remembering
#4
Inês Bramão, Anna Karlsson, Mikael Johansson
This study investigates context-dependent memory retrieval. Previous work has shown that physically re-experiencing the encoding context at retrieval improves memory accessibility. The current study examined if mental reconstruction of the original encoding context would yield parallel memory benefits. Participants performed a cued-recall memory task, preceded either by a mental or by a physical context reinstatement task, and we manipulated whether the context reinstated at retrieval overlapped with the context of the target episode...
June 24, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28710525/differential-role-of-the-anterior-and-intralaminar-lateral-thalamic-nuclei-in-systems-consolidation-and-reconsolidation
#5
Joëlle Lopez, Karine Gamache, Carmelo Milo, Karim Nader
The anterior thalamic nuclei (ATN) and the intralaminar/lateral thalamic nuclei (ILN/LT) play different roles in memory processes. The ATN are believed to be part of an extended hippocampal system, and the ILN/LT have strong connections with the medial prefrontal cortex. It was shown that the ILN/LT are involved in systems consolidation. However, whether they are necessary for memory retrieval as well remains unclear. We, therefore, used c-Fos immunohistochemistry and reversible inactivations to investigate the role of the ATN and ILN/LT in recent and remote contextual fear memory retrieval in rats...
July 14, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28709999/tdcs-over-the-right-inferior-frontal-gyrus-disrupts-control-of-interference-in-memory-a-retrieval-induced-forgetting-study
#6
Davide F Stramaccia, Barbara Penolazzi, Gianmarco Altoè, Giovanni Galfano
Retrieving information from episodic memory may result in later inaccessibility of related but task-irrelevant information. This phenomenon, known as retrieval-induced forgetting, is thought to represent a specific instance of broader cognitive control mechanisms, that would come into play during memory retrieval, whenever non-target competing memories interfere with recall of target items. Recent neuroimaging studies have shown an association between these mechanisms and the activity of the right Prefrontal Cortex...
July 11, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28707176/estimating-the-average-need-of-semantic-knowledge-from-distributional-semantic-models
#7
Geoff Hollis
Continuous bag of words (CBOW) and skip-gram are two recently developed models of lexical semantics (Mikolov, Chen, Corrado, & Dean, Advances in Neural Information Processing Systems, 26, 3111-3119, 2013). Each has been demonstrated to perform markedly better at capturing human judgments about semantic relatedness than competing models (e.g., latent semantic analysis; Landauer & Dumais, Psychological Review, 104(2), 1997 211; hyperspace analogue to language; Lund & Burgess, Behavior Research Methods, Instruments, & Computers, 28(2), 203-208, 1996)...
July 13, 2017: Memory & Cognition
https://www.readbyqxmd.com/read/28701986/controlling-the-anchoring-effect-through-transcranial-direct-current-stimulation-tdcs-to-the-right-dorsolateral-prefrontal-cortex
#8
Jianbiao Li, Xile Yin, Dahui Li, Xiaoli Liu, Guangrong Wang, Liang Qu
Selective accessibility mechanisms indicate that anchoring effects are results of selective retrieval of working memory. Neuroimaging studies have revealed that the right dorsolateral prefrontal cortex (DLPFC) is closely related to memory retrieval and performance. However, no research has investigated the effect of changing the cortical excitability in right DLPFC on anchoring effects. Transcranial direct current stimulation (tDCS) can modulate the excitability of the human cerebral cortex, while anodal and cathodal tDCS are postulated to increase or decrease cortical activity, respectively...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28698594/semantic-congruent-audiovisual-integration-during-the-encoding-stage-of-working-memory-an-erp-and-sloreta-study
#9
Yuanjun Xie, Yuanyuan Xu, Chen Bian, Min Li
Although multisensory integration is an inherent component of functional brain organization, multisensory integration during working memory (WM) has attracted little attention. The present study investigated the neural properties underlying the multisensory integration of WM by comparing semantically related bimodal stimulus presentations with unimodal stimulus presentations and analysing the results using the standardized low-resolution brain electromagnetic tomography (sLORETA) source location approach. The results showed that the memory retrieval reaction times during congruent audiovisual conditions were faster than those during unisensory conditions...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697998/neural-and-behavioural-correlates-of-autobiographical-memory-retrieval-in-patients-with-major-depressive-disorder-and-a-history-of-trauma-exposure
#10
Melissa Parlar, Maria Densmore, Geoffrey B C Hall, Ruth Lanius, Margaret C McKinnon
Alterations in autobiographical memory (AM) performance have been identified in major depressive disorder (MDD) and in trauma-related disorders; however, the neural and behavioural correlates of AM in patients with MDD and a co-morbid history of trauma remain unexplored. Here, we used behavioural and neuroimaging techniques to investigate AM in this patient group and in matched healthy comparison subjects (HCs). Twenty patients with MDD and trauma exposure and 20 HCs underwent fMRI scanning while recalling positive, negative, and neutral events...
July 8, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28676268/a-short-cut-to-the-past-cueing-via-concrete-objects-improves-autobiographical-memory-retrieval-in-alzheimer-s-disease-patients
#11
Marie Kirk, Dorthe Berntsen
Older adults diagnosed with Alzheimer's disease (AD) have difficulties accessing autobiographical memories. However, this deficit tends to spare memories dated to earlier parts of their lives, and may partially reflect retrieval deficits rather than complete memory loss. Introducing a novel paradigm, the present study examines whether autobiographical memory recall can be improved in AD by manipulating the sensory richness, concreteness and cultural dating of the memory cues. Specifically, we examine whether concrete everyday objects historically dated to the participants' youth (e...
July 1, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28669783/gabaergic-signaling-within-the-basolateral-amygdala-complex-modulates-resistance-to-the-labilization-reconsolidation-process
#12
Pablo Javier Espejo, Pharm D Vanesa Ortiz, Irene Delia Martijena, Victor Alejandro Molina
It is well known that stress can affect mnemonic processes. In particular, stress before contextual fear conditioning induces a memory which exhibits resistance to being interfered with by Midazolam (MDZ) when applied after memory retrieval. Moreover, stress exposure strongly affects GABAergic transmission within the Basolateral Amygdala Complex (BLA), a brain structure critically involved in fear memory processing. The present study evaluated the involvement of GABAergic signaling within the BLA on the induction of resistance to memory reconsolidation interference...
June 29, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28667695/recognition-memory-cellular-evidence-of-a-massive-contribution-of-the-lec-to-familiarity-and-a-lack-of-involvement-of-the-hippocampal-subfields-ca1-and-ca3
#13
Erika Atucha, Artem Karew, Takashi Kitsukawa, Magdalena M Sauvage
A highly debated issue in memory research is whether familiarity is supported by the parahippocampal region, especially the lateral (LEC) and the perirhinal (PER) cortices, or whether it is supported by the same brain structure as recollection: the hippocampus. One reason for this is that conflicting results have emerged regarding the contribution of the hippocampus to familiarity. This might stem from the lack of dissociation between hippocampal subfields CA1 and CA3 as these areas are involved to a different extent in processes which are pertinent to familiarity...
July 1, 2017: Hippocampus
https://www.readbyqxmd.com/read/28667669/optogenetic-stimulation-of-dentate-gyrus-engrams-restores-memory-in-alzheimer-s-disease-mice
#14
Jennifer N Perusini, Stephanie A Cajigas, Omid Cohensedgh, Sean C Lim, Ina P Pavlova, Zoe R Donaldson, Christine A Denny
Alzheimer's disease (AD) is a prevalent neurodegenerative disorder characterized by amyloid-beta (Aβ) plaques and tau neurofibrillary tangles. APPswe/PS1dE9 (APP/PS1) mice have been developed as an AD model and are characterized by plaque formation at 4-6 months of age. Here, we sought to better understand AD-related cognitive decline by characterizing various types of memory. In order to better understand how memory declines with AD, APP/PS1 mice were bred with ArcCreER(T2) mice. In this line, neural ensembles activated during memory encoding can be indelibly tagged and directly compared with neural ensembles activated during memory retrieval (i...
July 1, 2017: Hippocampus
https://www.readbyqxmd.com/read/28659764/associative-memory-extinction-is-accompanied-by-decayed-plasticity-at-motor-cortical-neurons-and-persistent-plasticity-at-sensory-cortical-neurons
#15
Rui Guo, Rongjing Ge, Shidi Zhao, Yulong Liu, Xin Zhao, Li Huang, Sodong Guan, Wei Lu, Shan Cui, Shirlene Wang, Jin-Hui Wang
Associative memory is essential for cognition, in which associative memory cells and their plasticity presumably play important roles. The mechanism underlying associative memory extinction vs. maintenance remains unclear, which we have studied in a mouse model of cross-modal associative learning. Paired whisker and olfaction stimulations lead to a full establishment of odorant-induced whisker motion in training day 10, which almost disappears if paired stimulations are not given in a week, and then recovers after paired stimulation for an additional day...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28655195/positive-autobiographical-memory-retrieval-reduces-temporal-discounting
#16
Karolina M Lempert, Megan E Speer, Mauricio R Delgado, Elizabeth A Phelps
People generally prefer rewards sooner rather than later. This phenomenon, temporal discounting, underlies many societal problems, including addiction and obesity. One way to reduce temporal discounting is to imagine positive future experiences. Since there is overlap in the neural circuitry associated with imagining future experiences and remembering past events, here we investigate whether recalling positive memories can also promote more patient choice. We found that participants were more patient after retrieving positive autobiographical memories, but not when they recalled negative memories...
June 26, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28649899/individual-differences-in-susceptibility-to-false-memories-the-effect-of-memory-specificity
#17
Stephen A Dewhurst, Rachel J Anderson, Donna M Berry, Sarah R Garner
Previous research has highlighted the wide individual variability in susceptibility to the false memories produced by the Deese/Roediger-McDermott (DRM) procedure [Deese, J. (1959). On the prediction of occurrence of particular verbal intrusions in immediate recall. Journal of Experimental Psychology, 58, 17-22; Roediger, H. L., III, & McDermott, K. B. (1995). Creating false memories: Remembering words not presented in lists. Journal of Experimental Psychology: Learning, Memory, & Cognition, 21, 803-814]...
June 25, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28648649/selective-inhibition-of-amygdala-neuronal-ensembles-encoding-nicotine-associated-memories-inhibits-nicotine-preference-and-relapse
#18
Yan-Xue Xue, Ya-Yun Chen, Li-Bo Zhang, Li-Qun Zhang, Geng-Di Huang, Shi-Chao Sun, Jia-Hui Deng, Yi-Xiao Luo, Yan-Ping Bao, Ping Wu, Ying Han, Bruce T Hope, Yavin Shaham, Jie Shi, Lin Lu
BACKGROUND: Nicotine craving and relapse often occurs after reactivation of nicotine reward memories. We recently developed a memory retrieval-reconsolidation interference procedure in which reactivating nicotine reward memories by acute exposure to nicotine (the unconditioned stimulus [UCS]) and then pharmacologically interfering with memory reconsolidation decreased relapse to nicotine seeking in rats and nicotine craving in smokers. Here, we investigated underlying mechanisms. METHODS: In the first series of experiments, we trained rats for nicotine-induced conditioned place preference (CPP) or nicotine self-administration and ventricularly microinjected them with the protein synthesis inhibitor anisomycin immediately after UCS-induced memory retrieval...
May 11, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28644892/r-modafinil-exerts-weak-effects-on-spatial-memory-acquisition-and-dentate-gyrus-synaptic-plasticity
#19
Bharanidharan Shanmugasundaram, Yogesh D Aher, Jana Aradska, Marija Ilic, Daniel Daba Feyissa, Predrag Kalaba, Nilima Y Aher, Vladimir Dragacevic, Babak Saber Marouf, Thierry Langer, Harald H Sitte, Harald Hoeger, Gert Lubec, Volker Korz
Modafinil is a wake promoting drug approved for clinical use and also has cognitive enhancing properties. Its enantiomer R-Modafinil (R-MO) is not well studied in regard to cognitive enhancing properties. Hence we studied its effect in a spatial memory paradigm and its possible effects on dentate gyrus long-term potentiation (DG-LTP). Clinically relevant doses of R-MO, vehicle dimethyl sulfoxide (DMSO) or saline were administered for three days during the hole-board test and in in vivo DG-LTP. Synaptic levels of dopamine receptors D1R, D2R, dopamine transporter (DAT), and its phosphorylated form (ph-DAT) in DG tissue 4 h after LTP induction were quantified by western blot analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28637289/the-importance-of-knowing-when-you-don-t-remember-neural-signaling-of-retrieval-failure-predicts-memory-improvement-over-time
#20
Yana Fandakova, Silvia A Bunge, Carter Wendelken, Peter Desautels, Lauren Hunter, Joshua K Lee, Simona Ghetti
Just as the ability to remember prior events is critical for guiding our decision-making, so too is the ability to recognize the limitations of our memory. Indeed, we hypothesize that neural signaling of retrieval failure promotes more accurate memory judgments over time. To test this hypothesis, we collected longitudinal functional magnetic resonance imaging data from 8 to 9 years olds, 10 to 12 years olds, and adults, with two time points spaced approximately 1.4 years apart (198 scan sessions in total)...
November 23, 2016: Cerebral Cortex
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