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Episodic memory

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https://www.readbyqxmd.com/read/29227896/details-of-attention-and-learning-change-in-first-episode-schizophrenia
#1
Christine Mohn, Anne-Kari Torgalsbøen
Impaired attention and learning functions are common in schizophrenia. The details of this impairment, and how these change across time, are not well known. We aimed to compare the parameters of well-known attention and learning neuropsychological tests in first-episode schizophrenia (FES) patients and healthy controls in a 2-year follow-up period. The performance of 28-25 FES patients and pairwise matched healthy controls on the Continuous Performance Test-Identical Pairs, the revised Hopkins Verbal Learning Test, and the revised Brief Visuospatial Memory Test was compared at baseline and 2 years later...
December 5, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29226861/neuroanatomical-comparison-of-the-word-and-picture-versions-of-the-free-and-cued-selective-reminding-test-in-alzheimer-s-disease
#2
Andrea Slachevsky, Paulo Barraza, Michael Hornberger, Carlos Muñoz-Neira, Emma Flanagan, Fernando Henríquez, Eduardo Bravo, Mauricio Farías, Carolina Delgado
Episodic memory tests with cued recall, such as the Free and Cued Selective Reminding Test (FCSRT), allow for the delineation of hippocampal and prefrontal atrophy contributions to memory performance in Alzheimer's disease (AD). Both Word and Picture versions of the test exist but show different profiles, with the Picture version usually scoring higher across different cohorts. One possible explanation for this divergent performance between the different modality versions of the test might be that they rely on different sets of neural correlates...
December 1, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29226762/assessing-cognitive-functioning-in-individuals-with-cocaine-use-disorder
#3
Kirsten M Frazer, Jennifer J Manly, Geraldine Downey, Carl L Hart
INTRODUCTION: There have been mixed findings assessing the impact of regular cocaine use on cognitive functioning. This study employed a comprehensive cognitive battery to compare the performance of individuals diagnosed with a cocaine use disorder (N = 3 abusers, N = 17 dependent) against the performance of two control groups: (a) non-drug-users, and (b) marijuana users who report no cocaine use (N = 7 marijuana abusers, N = 0 dependent, N = 13 marijuana users with no Diagnostic and Statistical Manual of Mental Disorders-Fourth Edition, DSM-IV, diagnosis)...
December 10, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/29224581/executive-function-and-other-cognitive-deficits-are-distal-risk-factors-of-generalized-anxiety-disorder-9-years-later
#4
Nur Hani Zainal, Michelle G Newman
OBJECTIVE: The cognitive model (Hirsch & Mathews, 2012) and attentional control theory (Eysenck & Derakshan, 2011) postulate that compromised executive function (EF) and other cognitive constructs are negatively linked to increased excessive and uncontrollable worry, the core symptom of generalized anxiety disorder (GAD). However, the prospective link between neuropsychological constructs and GAD are not well understood. METHODS: A nationally representative sample of 2605 community-dwelling adults whose average age was 55...
December 11, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29223864/involuntary-top-down-control-by-search-irrelevant-features-visual-working-memory-biases-attention-in-an-object-based-manner
#5
Rebecca M Foerster, Werner X Schneider
Many everyday tasks involve successive visual-search episodes with changing targets. Converging evidence suggests that these targets are retained in visual working memory (VWM) and bias attention from there. It is unknown whether all or only search-relevant features of a VWM template bias attention during search. Bias signals might be configured exclusively to task-relevant features so that only search-relevant features bias attention. Alternatively, VWM might maintain objects in the form of bound features...
December 7, 2017: Cognition
https://www.readbyqxmd.com/read/29223779/female-verbal-memory-advantage-in-temporal-but-not-frontal-lobe-epilepsy
#6
Justus Berger, Katharina Demin, Martin Holtkamp, Thomas Bengner
Women show better performance than men on a range of episodic memory tasks. Evidence regarding a neuroanatomical localization of this effect remains ambiguous. It has been suggested that anterior temporal lobe structures are responsible for sex differences in verbal memory, yet temporal lobe epilepsy (TLE) and TLE surgery do not affect women's verbal memory advantage. Instead, frontal lobe regions may be relevant for female verbal memory superiority, i.e. by enabling more efficient encoding and retrieval strategies in women...
December 2, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29220304/the-interaction-between-semantic-representation-and-episodic-memory
#7
Jing Fang, Naima Rüther, Christian Bellebaum, Laurenz Wiskott, Sen Cheng
The experimental evidence on the interrelation between episodic memory and semantic memory is inconclusive. Are they independent systems, different aspects of a single system, or separate but strongly interacting systems? Here, we propose a computational role for the interaction between the semantic and episodic systems that might help resolve this debate. We hypothesize that episodic memories are represented as sequences of activation patterns. These patterns are the output of a semantic representational network that compresses the high-dimensional sensory input...
December 8, 2017: Neural Computation
https://www.readbyqxmd.com/read/29218403/the-storage-and-recall-of-memories-in-the-hippocampo-cortical-system
#8
REVIEW
Edmund T Rolls
A quantitative computational theory of the operation of the hippocampus as an episodic memory system is described. The CA3 system operates as a single attractor or autoassociation network (1) to enable rapid one-trial associations between any spatial location (place in rodents or spatial view in primates) and an object or reward and (2) to provide for completion of the whole memory during recall from any part. The theory is extended to associations between time and object or reward to implement temporal order memory, which is also important in episodic memory...
December 7, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29215606/cognitive-and-mood-effects-of-a-nutrient-enriched-breakfast-bar-in-healthy-adults-a-randomised-double-blind-placebo-controlled-parallel-groups-study
#9
David O Kennedy, Emma L Wightman, Joanne Forster, Julie Khan, Crystal F Haskell-Ramsay, Philippa A Jackson
OBJECTIVES: Few previous studies have assessed the effects of concomitant administration of multiple potentially psychoactive nutrients. METHODS: 95 healthy adult participants consumed either a nutrient enriched breakfast bar (containing α-Linolenic acid, l-tyrosine, l-theanine, vitamins, minerals and 21.5 mg of caffeine) or an isocaloric, macronutrient matched control bar for 56 days. Cognitive function and mood were assessed pre-dose and at 40- and 160-min post-dose on the 1st and 56th day of the intervention period...
December 7, 2017: Nutrients
https://www.readbyqxmd.com/read/29213506/symptoms-of-depression-in-patients-with-mild-cognitive-impairment-in-parkinson-s-disease
#10
Ana Lara Soares Blum Malak, Luiz Felipe Vasconcellos, João Santos Pereira, Denise Vieira Greca, Manuela Cruz, Heloisa Veiga Dias Alves, Mariana Sptiz, Helenice Charchat-Fichman
Objective: To investigate the most frequent depressive symptoms and their association with cognition in Parkinson's disease (PD) patients with mild cognitive impairment (MCI). Methods: 48 patients with PD and 44 controls (CG), aged between 50 and 80 years and with at least 4 years of formal education, all with MCI and none diagnosed with depression, were assessed. Patients and controls were matched for age, education, and Mini-Mental State Examination (MMSE) score...
April 2017: Dementia & Neuropsychologia
https://www.readbyqxmd.com/read/29213496/effects-of-a-cognitive-training-program-and-sleep-hygiene-for-executive-functions-and-sleep-quality-in-healthy-elderly
#11
Katie Moraes de Almondes, Maria Emanuela Matos Leonardo, Ana Maria Souza Moreira
Introduction: The aging process causes changes in the sleep-wake cycle and cognition, especially executive functions. Interventions are required to minimize the impact of the losses caused by the aging process. Objective: To evaluate the effects of a cognitive training program and psychoeducation on sleep hygiene techniques for executive functions and sleep quality in healthy elderly. Methods: The participants were 41 healthy elderly randomized into four groups ([CG] control group, cognitive training group [CTG], sleep hygiene group [SHG] and cognitive training and hygiene group [THG])...
January 2017: Dementia & Neuropsychologia
https://www.readbyqxmd.com/read/29210884/discrepancy-between-cerebral-structure-and-cognitive-functioning-a-review
#12
Michael Nahm, David Rousseau, Bruce Greyson
Neuroscientists typically assume that human mental functions are generated by the brain and that its structural elements, including the different cell layers and tissues that form the neocortex, play specific roles in this complex process. Different functional units are thought to complement one another to create an integrated self-awareness or episodic memory. Still, findings that pertain to brain dysplasia and brain lesions indicate that in some individuals there is a considerable discrepancy between the cerebral structures and cognitive functioning...
December 2017: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/29209169/amyloid-%C3%AE-homeostasis-bridges-inflammation-synaptic-plasticity-deficits-and-cognitive-dysfunction-in-multiple-sclerosis
#13
Mario Stampanoni Bassi, Sara Garofalo, Girolama A Marfia, Luana Gilio, Ilaria Simonelli, Annamaria Finardi, Roberto Furlan, Giulia M Sancesario, Jonny Di Giandomenico, Marianna Storto, Francesco Mori, Diego Centonze, Ennio Iezzi
Cognitive deficits are frequently observed in multiple sclerosis (MS), mainly involving processing speed and episodic memory. Both demyelination and gray matter atrophy can contribute to cognitive deficits in MS. In recent years, neuroinflammation is emerging as a new factor influencing clinical course in MS. Inflammatory cytokines induce synaptic dysfunction in MS. Synaptic plasticity occurring within hippocampal structures is considered as one of the basic physiological mechanisms of learning and memory. In experimental models of MS, hippocampal plasticity is profoundly altered by proinflammatory cytokines...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29204343/episodic-memory-after-trauma-exposure-medial-temporal-lobe-function-is-positively-related-to-re-experiencing-and-inversely-related-to-negative-affect-symptoms
#14
Jennifer S Stevens, Renuka Reddy, Ye Ji Kim, Sanne J H van Rooij, Timothy D Ely, Stephan Hamann, Kerry J Ressler, Tanja Jovanovic
Hippocampal structure is particularly sensitive to trauma and other stressors. However, previous findings linking hippocampal function with trauma-related psychopathology have been mixed. Heterogeneity in psychological responses to trauma has not been considered with respect to hippocampal function and may contribute to mixed findings. To address these issues, we examined associations between data-driven symptom dimensions and episodic memory formation, a key function of the hippocampus, in a trauma-exposed sample...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29204115/a-randomized-double-blind-study-assessing-changes-in-cognitive-function-in-indian-school-children-receiving-a-combination-of-bacopa-monnieri-and-micronutrient-supplementation-vs-placebo
#15
Tora Mitra-Ganguli, Soumik Kalita, Sakshi Bhushan, Con Stough, James Kean, Nan Wang, Vidhu Sethi, Anuradha Khadilkar
Several studies have indicated a chronic cognitive enhancing effect of Bacopa monnieri across different ages and cognitive impairment associated with vitamin and mineral deficiencies in children. Therefore, we investigated the effects of 4-month supplementation with a combination of B. monnieri extract and multiple micronutrients on cognitive functions in Indian school children aged 7-12 years. This was a randomized, double-blind, parallel design, single-center study in which 300 children were randomized to receive a beverage either fortified with B...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29203208/systems-consolidation-revisited-but-not-revised-the-promise-and-limits-of-optogenetics-in-the-study-of-memory
#16
REVIEW
Hardt Oliver, Nadel Lynn
Episodic memories (in humans) and event-like memories (in non-human animals) require the hippocampus for some time after acquisition, but at remote points seem to depend more on cortical areas instead. Systems consolidation refers to the process that promotes this reorganization of memory. Various theoretical frameworks accounting for this process have been proposed, but clear evidence favoring one or another of these positions has been lacking. Addressing this issue, a recent study deployed some of the most advanced neurobiological technologies - optogenetics and calcium imaging - and provided high resolution, precise observations regarding brain systems involved in recent and remote contextual fear memories...
December 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29201645/promoter-haplotypes-of-interleukin-10-gene-linked-to-cortex-plasticity-in-subjects-with-risk-of-alzheimer-s-disease
#17
Feng Bai, Chunming Xie, Yonggui Yuan, Yongmei Shi, Zhijun Zhang
The Alzheimer's disease (AD) aetiologic event is associated with brain inflammatory processes. In this study, we consider a haplotype of the IL-10 gene promoter region, - 1082A/- 819 T/- 592A (ATA haplotype), which is an additive and independent genetic risk factor for AD. Episodic memory change is the most striking cognitive alteration in AD. It remains unclear whether episodic memory networks can be affected by the ATA haplotype variant in amnestic mild cognitive impairment (aMCI), and if so, how this occurs...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29200611/serial-position-output-order-and-list-length-effects-for-words-presented-on-smartphones-over-very-long-intervals
#18
Cathleen Cortis Mack, Caterina Cinel, Nigel Davies, Michael Harding, Geoff Ward
Three experiments examined whether or not benchmark findings observed in the immediate retrieval from episodic memory are similarly observed over much greater time-scales. Participants were presented with experimentally-controlled lists of words at the very slow rate of one word every hour using an iPhone recall application, RECAPP, which was also used to recall the words in either any order (free recall: Experiments 1 to 3) or the same order as presented (serial recall: Experiment 3). We found strong temporal contiguity effects, weak serial position effects with very limited recency, and clear list length effects in free recall; clear primacy effects and classic error gradients in serial recall; and recency effects in a final two-alternative forced choice recognition task (Experiments 2 and 3)...
December 2017: Journal of Memory and Language
https://www.readbyqxmd.com/read/29199593/insulin-protects-against-brain-oxidative-stress-with-an-apparent-effect-on-episodic-memory-in-doxorubicin-induced-cognitive-dysfunction-in-wistar-rats
#19
Grandhi Venkata Ramalingayya, Vishwajeet Sonawane, Sri Pragnya Cheruku, Anoop Kishore, Pawan G Nayak, Nitesh Kumar, Rekha S Shenoy, Krishnadas Nandakumar
The present study was aimed at assessing the protective effect of insulin against doxorubicin (DOX)-induced cognitive dysfunction in Wistar rats. Cognitive function for episodic memory was assessed by a novel object recognition task (NORT) in male Wistar rats. Oxidative stress markers-SOD, catalase, glutathione, and lipid peroxidation-in the hippocampus and frontal cortex were assessed using colorimetric methods. Doxorubicin treatment (2.5 mg/kg, i.p., every 5 days for 50 days) reduced recognition and discriminative indices in NORT with increased oxidative stress in the brain...
2017: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/29198443/how-the-human-brain-introspects-about-one-s-own-episodes-of-cognitive-control
#20
David Soto, Mona Theodoraki, Pedro M Paz-Alonso
Metacognition refers to our capacity to reflect upon our experiences, thoughts and actions. Metacognition processes are linked to cognitive control functions that allow keeping our actions on-task. But it is unclear how the human brain builds an internal model of one's cognition and behaviour. We conducted two functional magnetic resonance imaging (fMRI) experiments in which brain activity was recorded 'online' as participants engaged in a memory-guided search task and then later 'offline' when participants introspected about their prior experience and cognitive states during performance...
November 8, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
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