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"Memory retrieval"

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https://www.readbyqxmd.com/read/29221830/distinguishable-memory-retrieval-networks-for-collaboratively-and-non-collaboratively-learned-information
#1
Flora Vanlangendonck, Atsuko Takashima, Roel M Willems, Peter Hagoort
Learning often occurs in communicative and collaborative settings, yet almost all research into the neural basis of memory relies on participants encoding and retrieving information on their own. We investigated whether learning linguistic labels in a collaborative context at least partly relies on cognitively and neurally distinct representations, as compared to learning in an individual context. Healthy human participants learned labels for sets of abstract shapes in three different tasks. They came up with labels with another person in a collaborative communication task (collaborative condition), by themselves (individual condition), or were given pre-determined unrelated labels to learn by themselves (arbitrary condition)...
December 5, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29217684/retrieval-demands-adaptively-change-striatal-old-new-signals-and-boost-subsequent-long-term-memory
#2
Nora A Herweg, Tobias Sommer, Nico Bunzeck
The striatum is a central part of the dopaminergic mesolimbic system and contributes both to the encoding and retrieval of long-term memories. In this regard, the co-occurrence of striatal novelty and retrieval success effects in independent studies underlines the structure's double duty and suggests dynamic contextual adaption. To test this hypothesis and further investigate the underlying mechanisms of encoding and retrieval dynamics, human subjects viewed pre-familiarized scene images intermixed with new scenes and classified them as indoor vs...
December 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29208492/resting-state-connectivity-mediates-the-relationship-between-collectivism-and-social-cognition
#3
Gennady G Knyazev, Alexander N Savostyanov, Andrey V Bocharov, Ekaterina A Merkulova
Humans are intrinsically social beings and it is natural that self-processing is associated with social cognition. The degree to which the self is perceived as a part of social environment is modulated by cultural stereotypes, such as collectivism and individualism. Here, we tested the hypothesis that individuals who endorse collectivist values would spontaneously think more about their relationships with other people and this association would be mediated by connectivity between the medial prefrontal cortex (MPFC) and the rest of the brain...
December 2, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29202669/the-relationship-between-smell-identification-and-neuropsychological-domains-results-from-a-sample-of-community-dwelling-adults-suspected-of-dementia
#4
William F Goette, Amy E Werry, Andrew L Schmitt
OBJECTIVE: This study aimed to test the theoretical relationships between smell identification and cognitive tasks based on existing neuroimaging and anatomical findings. METHOD: Utilizing data collected from a memory assessment clinic, theory-derived mediation and moderation models were tested. The sample used in this study consisted of 103 (39 male, 64 female) individuals referred for memory assessments. The sample's mean education was 12.4 years (SD = 3.2), and the mean age of the sample was 77...
December 4, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/29191578/gastrin-releasing-peptide-attenuates-fear-memory-reconsolidation
#5
A Murkar, P Kent, C Cayer, J James, Z Merali
BACKGROUND: Gastrin Releasing Peptide (GRP) may play a role in fear learning. The GRP Receptor is expressed in the basolateral amygdala and hippocampus, and central administration of GRP mediates fear learning. The effects of GRP on reconsolidation, however, have been minimally explored. Reconsolidation, the process by which formed memories are rendered labile following recall, provides a window of opportunity for pharmacological intervention. Although evidence suggests the window of opportunity to alter reactivated consolidation memory can be as long as 6h, shorter intervals have not been extensively investigated...
November 27, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29189019/across-sex-and-age-learning-and-memory-and-patterns-of-avian-hippocampal-gene-expression
#6
Saritha Kosarussavadi, Zachary T Pennington, Jeremy Covell, Aaron P Blaisdell, Barney A Schlinger
Age-related decrements in cognitive ability have been proposed to stem from deteriorating function of the hippocampus. Many birds are long lived, especially for their relatively small body mass and elevated metabolism, making them a unique model of resilience to aging. Nevertheless, little is known about avian age-related changes in cognition and hippocampal physiology. We studied spatial cognition and hippocampal expression of the age-related gene, Apolipoprotein D (ApoD), and the immediate early gene Egr-1 in zebra finches at various developmental time points...
December 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/29182653/recovery-from-trauma-induced-amnesia-correlates-with-normalization-of-thrombin-activity-in-the-mouse-hippocampus
#7
Marina Ben Shimon, Talya Zeimer, Efrat Shavit Stein, Avital Artan-Furman, Sagi Harnof, Joab Chapman, Arik Eisenkraft, Chaim G Pick, Nicola Maggio
Transient amnesia is a common consequence of minimal traumatic brain injury (mTBI). However, while recent findings have addressed the mechanisms involved in its onset, the processes contributing to its recovery have not yet been addressed. Recently, we have found that thrombin is detected at high concentrations in the brain of mice after exposure to mTBI and that in such settings amnesia is rescued by either inhibiting thrombin activity or by blockade of PAR1. Here, we report that mice spontaneously recover from amnesia after two weeks from mTBI exposure...
2017: PloS One
https://www.readbyqxmd.com/read/29181814/a-high-working-memory-load-prior-to-memory-retrieval-reduces-craving-in-non-treatment-seeking-problem-drinkers
#8
Anne Marije Kaag, Anna E Goudriaan, Taco J De Vries, Tommy Pattij, Reinout W Wiers
BACKGROUND: Reconsolidation-based interventions have been suggested to be a promising treatment strategy for substance use disorders. In this study, we aimed to investigate the effectiveness of a working memory intervention to interfere with the reconsolidation of alcohol-related memories in a sample of non-treatment seeking heavy drinkers. METHODS: Participants were randomized to one of the two conditions that underwent a 3-day intervention: in the experimental condition, a 30-min working memory training was performed immediately after a 15-min memory retrieval session (i...
November 27, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29172560/the-testing-effect-in-a-social-setting-does-retrieval-practice-benefit-a-listener
#9
Magdalena Abel, Henry L Roediger
Retrieval practice boosts retention relative to other study strategies like restudying, a finding known as the testing effect. In 3 experiments, the authors investigated testing in social contexts. Subjects participated in pairs and engaged in restudy and retrieval practice of vocabulary pairs. During retrieval practice, 1 subject acted as speaker (overt practice); the other subject listened and monitored the speaker's responses (covert practice). All experiments showed testing effects, with overt practice by speakers enhancing recall relative to restudy after a 2-day delay...
November 27, 2017: Journal of Experimental Psychology. Applied
https://www.readbyqxmd.com/read/29163115/anodal-tdcs-enhances-verbal-episodic-memory-in-initially-low-performers
#10
Annegret Habich, Stefan Klöppel, Ahmed Abdulkadir, Elisa Scheller, Christoph Nissen, Jessica Peter
The left dorsolateral prefrontal cortex (DLPFC) is involved in encoding and retrieval of episodic memories, and thus, is frequently targeted in non-invasive brain stimulation paradigms, aiming for its functional modulation. Anodal transcranial direct current stimulation (tDCS), that boosts neuronal excitability in stimulated cortical areas, has been found to increase cognitive skills differentially, depending on the initial performance. We hypothesize that the benefit of tDCS on verbal episodic memory can be extrapolated from the participants' baseline performance...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29162383/inhibition-of-ampar-endocytosis-alleviates-pentobarbital-induced-spatial-memory-deficits-and-synaptic-depression
#11
Wei Wang, Tao Tan, Yanzhi Yu, Zhilin Huang, Yehong Du, Huili Han, Zhifang Dong
Our previous study has shown that pentobarbital causes memory deficits and impairs hippocampal synaptic plasticity. The Tat-GluA23Y peptide (GluA23Y) prevents activity-dependent α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor (AMPAR) endocytosis. It enables early-phase long-term potentiation (LTP) to proceed to late-phase LTP allowing short-term memory to convert to long-term memory. The purpose of this study is to explore the potential effects of GluA23Y on pentobarbital-induced memory deficits through behavioral and electrophysiological paradigms...
November 18, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29161563/memory-retrieval-taking-the-route-via-subiculum
#12
Debora Ledergerber, Edvard Ingjald Moser
An episodic memory goes through three different stages: acquisition, consolidation and recall. A new study suggests that distinct microcircuits in the hippocampus underlie the process of memory acquisition and recall.
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29149767/the-effects-of-sleep-on-the-neural-correlates-of-pattern-separation
#13
Christopher R Doxey, Cooper Hodges, Ty Bodily, Nathan M Muncy, C Brock Kirwan
Effective memory representations must be specific to prevent interference between episodes that may overlap in terms of place, time, or items present. Pattern separation, a computational process performed by the hippocampus, overcomes this interference by establishing non-overlapping memory representations. Although it is widely accepted that declarative memories are consolidated during sleep, the effects of sleep on pattern separation have yet to be elucidated. We used whole-brain, high-resolution functional neuroimaging to investigate the effects of sleep on a task that places high demands on pattern separation...
November 17, 2017: Hippocampus
https://www.readbyqxmd.com/read/29137815/local-injection-of-d-lys-3-ghrp-6-in-the-rat-amygdala-dentate-gyrus-or-ventral-tegmental-area-impairs-memory-consolidation
#14
Siamak Beheshti, Neda Aslani
It is well known that the hormone ghrelin affects learning and memory in different experimental models of learning. Though, the effect of antagonism of ghrelin receptor type 1a (GHS-R1a) in various regions of the brain and on different stages of learning has not been examined. In this study the effect of injection of a GHS-R1a selective antagonist (d-Lys-3-GHRP-6) into the basolateral amygdala, dentate gyrus or ventral tegmental area was examined on memory consolidation in the passive avoidance task. Adult male Wistar rats weighing 230-280g were used...
November 4, 2017: Neuropeptides
https://www.readbyqxmd.com/read/29137530/neuroanatomical-substrates-involved-in-unrelated-false-facial-recognition
#15
Eliane Ronzon-Gonzalez, Carlos R Hernandez-Castillo, Erick H Pasaye, Israel Vaca-Palomares, Juan Fernandez-Ruiz
Identifying faces is a process central for social interaction and a relevant factor in eyewitness theory. False recognition is a critical mistake during an eyewitness's identification scenario because it can lead to a wrongful conviction. Previous studies have described neural areas related to false facial recognition using the standard Deese/Roediger-McDermott (DRM) paradigm (morphed faces, looking similar to each other), triggering false memories (related false recognition). Nonetheless, misidentification of faces without trying to elicit false memories (unrelated false recognition) in a police lineup could involve different cognitive processes, and therefore, distinct neural areas...
November 15, 2017: Social Neuroscience
https://www.readbyqxmd.com/read/29136946/neuroprotective-effect-of-hesperetin-and-nano-hesperetin-on-recognition-memory-impairment-and-the-elevated-oxygen-stress-in-rat-model-of-alzheimer-s-disease
#16
Elham Kheradmand, Akbar Hajizadeh Moghaddam, Mahboobeh Zare
Alzheimer disease (AD) is a progressive dementia affecting a large proportion of the aging population. There is evidence that brain tissue in patients with AD is exposed to oxidative stress during the course of the disease. Hesperetin (Hst) is a natural flavonoid, which has been reported to exert various biological activities such as antioxidant and anti-inflammatory effect. The present study aimed to investigate the effects of hesperetin and nano-hesperetin on neurobehavioral activity and superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GRx) and catalase (CAT) enzymes activity, malondialdehyde (MDA) and glutathione (GSH) levels in hippocampal area of rats in an experimental model of AD...
November 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29129405/neurogenesis-and-morphological-neural-alterations-closely-related-to-amyloid-%C3%AE-peptide-25-35-induced-memory-impairment-in-male-rats
#17
Eleazar Ramírez, Liliana Mendieta, Gonzalo Flores, I Daniel Limón
Memory impairment by the Amyloid-β 25-35 (Aβ25-35) peptide in animal models has provided an understanding of the causes behind the similar deterioration that occurs in Alzheimer's disease. However, it is uncertain if a decrease of dendritic spines and neurogenesis conduces to cognitive impairment by an impairment in the retrieval of stored memory. The aim of this study was to evaluate the consequences of impairment on spatial memory caused by the administration of the Aβ25-35 peptide in the hippocampus, which is associated whit morphological changes and neurogenesis in the dentate gyrus (DG)...
November 6, 2017: Neuropeptides
https://www.readbyqxmd.com/read/29119716/episodic-memory-retrieval-in-adolescents-with-and-without-developmental-language-disorder-dld
#18
Joanna C Lee
BACKGROUND: Two reasons may explain the discrepant findings regarding declarative memory in developmental language disorder (DLD) in the literature. First, standardized tests are one of the primary tools used to assess declarative memory in previous studies. It is possible they are not sensitive enough to subtle memory impairment. Second, the system underlying declarative memory is complex, and thus results may vary depending on the types of encoding and retrieval processes measured (e...
November 8, 2017: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/29118728/mutual-influence-of-reward-anticipation-and-emotion-on-brain-activity-during-memory-retrieval
#19
Chunping Yan, Fang Liu, Yunyun Li, Qin Zhang, Lixia Cui
Previous studies on the joint effect of reward motivation and emotion on memory retrieval have obtained inconsistent results. Furthermore, whether and how any such joint effect might vary over time remains unclear too. Accordingly, using the event-related potential (ERP) measurement of high temporal resolution, our study investigates the cognitive and brain mechanisms of monetary reward and emotion affecting the retrieval processes of episodic memory. Twenty undergraduate and graduate students participated in the research, and our study's behavioral results indicated that reward (relative to no reward) and negative emotion (relative to positive and neutral emotion) significantly improved recognition performance...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29116882/lingering-cognitive-states-shape-fundamental-mnemonic-abilities
#20
Anuya Patil, Katherine Duncan
Why are people sometimes able to recall associations in exquisite detail while at other times left frustrated by the deficiencies of memory? Although this apparent fickleness of memory has been extensively studied by investigating factors that build strong memory traces, researchers know less about whether memory success also depends on cognitive states that are in place when a cue is encountered. Motivating this possibility, neurocomputational models propose that the hippocampus's capacity to support associative recollection (pattern completion) is biased by persistent neurochemical states, which can be elicited by exposure to familiarity and novelty...
November 1, 2017: Psychological Science
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