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https://www.readbyqxmd.com/read/28748447/cross-modal-working-memory-binding-and-l1-l2-word-learning
#1
Shinmin Wang, Richard J Allen, Shin-Yi Fang, Ping Li
The ability to create temporary binding representations of information from different sources in working memory has recently been found to relate to the development of monolingual word recognition in children. The current study explored this possible relationship in an adult word-learning context. We assessed whether the relationship between cross-modal working memory binding and lexical development would be observed in the learning of associations between unfamiliar spoken words and their semantic referents, and whether it would vary across experimental conditions in first- and second-language word learning...
July 26, 2017: Memory & Cognition
https://www.readbyqxmd.com/read/28747686/memory-and-perception-based-facial-image-reconstruction
#2
Chi-Hsun Chang, Dan Nemrodov, Andy C H Lee, Adrian Nestor
Visual memory for faces has been extensively researched, especially regarding the main factors that influence face memorability. However, what we remember exactly about a face, namely, the pictorial content of visual memory, remains largely unclear. The current work aims to elucidate this issue by reconstructing face images from both perceptual and memory-based behavioural data. Specifically, our work builds upon and further validates the hypothesis that visual memory and perception share a common representational basis underlying facial identity recognition...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28744790/cognitive-evaluation-of-patients-with-glaucoma-and-its-comparison-with-individuals-with-alzheimer-s-disease
#3
Stephanie Toledo Piza Maurano, Delson José da Silva, Marcos P Ávila, Leopoldo Magacho
PURPOSE: To evaluate the cognitive performance of patients with glaucoma and compare it to individuals with Alzheimer's disease (AD). METHODS: This is a prospective, cross-sectional and case-control study. All subjects were assessed using the Mini-Mental State Examination (MMSE) and its subtests verbal fluency, word list memory, delayed recall of the word list, word list recognition test, Boston naming and constructive praxis from Consortium to Establish a Registry for Alzheimer's Disease (CERAD)...
July 25, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28744648/dynamics-of-the-development-of-depressive-like-state-in-rats-stressed-by-chronic-exposure-of-ultrasound-of-variable-frequency
#4
A V Gorlova, D A Pavlov, V M Ushakova, E A Zubkov, A Yu Morozova, A N Inozemtsev, V P Chekhonin
We studied the effect of ultrasonic waves with a frequency of 20-45 kHz on behavioral reactions of rats after 7, 14 and 21 days of continuous exposure. A decrease in the number of social contacts in the social interest test was recorded in all groups, while lengthening of immobility time in Porsolt test was found only in the groups exposed to ultrasound for 2 and 3 weeks. Memory impairment in the new object recognition test was recorded only after 21 days of stressing. Chronic exposure to ultrasound of variable frequencies leads to the development of a depressive-like state in rats and the duration of exposure affects the specificity of the observed disorders...
July 26, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28743453/pregnane-x-receptor-deletion-modifies-recognition-memory-and-electroencephalographic-activity
#5
Badreddine Boussadia, Laila Lakhal, Laurance Payrastre, Chaitali Ghosh, Jean-Marc Pascussi, Giuseppe Gangarossa, Nicola Marchi
Nuclear receptors (NR) are emerging as key players in the central nervous system (CNS) with reported implications in physiological and pathophysiological conditions. While other NR have been studied, it is unknown whether invalidation of the pregnane xenobiotic receptor (PXR, NR1I2) corresponds to neurological modifications in the adult brain. PXR(-/-) C57BL/6j and wild type mice were used to investigate: i) recognition memory, motor coordination, and anxiety-like behaviors; ii) longitudinal video-electroencephalographic (EEG) recordings and frequency wave analysis; iii) neurovascular structures by histological evaluation and expression of the cerebrovascular tight junctions ZO1 and CLDN5...
July 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/28741253/dissociations-of-the-number-and-precision-of-visual-short-term-memory-representations-in-change-detection
#6
Weizhen Xie, Weiwei Zhang
The present study dissociated the number (i.e., quantity) and precision (i.e., quality) of visual short-term memory (STM) representations in change detection using receiver operating characteristic (ROC) and experimental manipulations. Across three experiments, participants performed both recognition and recall tests of visual STM using the change-detection task and the continuous color-wheel recall task, respectively. Experiment 1 demonstrated that the estimates of the number and precision of visual STM representations based on the ROC model of change-detection performance were robustly correlated with the corresponding estimates based on the mixture model of continuous-recall performance...
July 24, 2017: Memory & Cognition
https://www.readbyqxmd.com/read/28741167/microvascular-ultrastructural-changes-precede-cognitive-impairment-in-the-murine-appswe-ps1de9-model-of-alzheimer-s-disease
#7
Patricia Kelly, Paul Denver, Simon C Satchell, Maximilian Ackermann, Moritz A Konerding, Christopher A Mitchell
Cerebral and systemic organ microvascular pathologies coexist with human Alzheimer's disease (AD) neuropathology. In this study, we hypothesised that both cerebral and systemic microvascular pathologies exist in 4- to 5-month-old male APPswe/PS1dE9 (APP/PS1) transgenic mice prior to the onset of cognitive impairment. To assess this we examined recognition memory in both wild-type and APP/PS1 mice using the object recognition task (ORT; n = 11 per group) and counted thioflavin-S-positive plaques in brain (n = 6 per group)...
July 25, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28741085/the-effect-of-sleep-deprivation-on-retrieval-of-emotional-memory-a-behavioural-study-using-film-stimuli
#8
Daniela Tempesta, Valentina Socci, Giada Dello Ioio, Luigi De Gennaro, Michele Ferrara
Although the deleterious effects of sleep deprivation on memory consolidation are well documented, it is still unclear how the facilitating effect of emotions on memory consolidation processes could be modulated by the lack of sleep. In this study, we investigated the effects of sleep deprivation on episodic memory using emotional and non-emotional film stimuli. Forty-eight healthy subjects, divided into a sleep group (SG) and a sleep-deprived (SD) group, completed an Encoding and a Recall phase. Participants in the SD group were sleep deprived the night immediately following the Encoding phase, whereas the control group slept at home...
July 24, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28740815/positive-schizotypy-and-negative-schizotypy-are-associated-with-differential-patterns-of-episodic-memory-impairment
#9
Lili Sahakyan, Thomas R Kwapil
Cognitive impairment is a hallmark of schizophrenia; however, studies have not comprehensively examined such impairments in non-clinically ascertained schizotypic young adults. The present study employed a series of measures to assess episodic memory in high positive schizotypy, high negative schizotypy, and comparison groups (each group n = 25). Consistent with diminished cognitive functioning seen in negative symptom schizophrenia, the negative schizotypy group exhibited deficits on free recall, recognition, and source memory tasks...
September 2016: Schizophrenia Research. Cognition
https://www.readbyqxmd.com/read/28739524/social-instability-stress-in-adolescent-male-rats-reduces-social-interaction-and-social-recognition-performance-and-increases-oxytocin-receptor-binding
#10
Travis E Hodges, Jennet L Baumbach, Marina L Marcolin, Remco Bredewold, Alexa H Veenema, Cheryl M McCormick
Social experiences in adolescence are essential for displaying context-appropriate social behaviours in adulthood. We previously found that adult male rats that underwent social instability stress (SS) in adolescence had reduced social interactions with unfamiliar peers compared with non-stressed controls (CTL). Here we determined whether SS altered social recognition and social reward and brain oxytocin and vasopressin receptor density in adolescence. We confirmed that SS rats spent less time interacting with unfamiliar peers than did CTL rats (p = 0...
July 21, 2017: Neuroscience
https://www.readbyqxmd.com/read/28739376/functional-inactivation-of-dorsal-medial-striatum-alters-behavioral-flexibility-and-recognition-process-in-mice
#11
Yanhua Qiao, Xingyue Wang, Lian Ma, Shengguang Li, Jing Liang
Deficits in behavioral flexibility and recognition memory are commonly observed in mental illnesses and neurodegenerative diseases. Abnormality of the striatum has been implicated in an association with the pathology of these diseases. However, the exact roles of striatal heterogeneous structures in these cognitive functions are still unknown. In the present study, we investigated the effects of suppressing neuronal activity in the dorsomedial striatum (DMStr) and nucleus accumbens core (NAcC) on reversal learning and novelty recognition in mice...
July 21, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28739131/ibudilast-reduces-oxaliplatin-induced-tactile-allodynia-and-cognitive-impairments-in-rats
#12
Ian N Johnston, Manuela Tan, Jacob Cao, Antigone Matsos, Daniel R L Forrest, Emily Si, Joanna E Fardell, Mark R Hutchinson
Chemotherapy can cause serious neurotoxic side effects, such as painful peripheral neuropathies and disabling cognitive impairments. Four experiments examined whether Ibudilast, a clinically approved neuroimmune therapy, would reduce tactile allodynia and memory impairments caused by oxaliplatin in laboratory rats. Rats received an intraperitoneal injection of oxaliplatin (6mg/kg i.p.) or vehicle and were assessed for tactile allodynia 3 or 5days after injection, memory impairments in the novel object and novel location recognition tests 10-12days after injection, and fear conditioning 14days after injection...
July 21, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28738393/estrogen-and-environmental-enrichment-differentially-affect-neurogenesis-dendritic-spine-immunolabeling-and-synaptogenesis-in-the-hippocampus-of-young-and-reproductively-senescent-female-rats
#13
Tina Sager, Michael Kashon, Kristine Krajnak
<br>Background: Studies examining the ability of estrogen replacement therapy (ERT) to enhance memory in women, and in animal models, have not produced consistent results. However, studies examining the effects of activity and exposure to novel environments consistently find enhancement of memory. METHODS: An animal model of reproductive aging was used to determine if estradiol (E2) replacement, activity, and/or exposure to an enriched environment could act synergistically to improve memory, and neural correlates of memory...
July 24, 2017: Neuroendocrinology
https://www.readbyqxmd.com/read/28738289/germinal-center-enhancement-by-extended-antigen-availability
#14
REVIEW
Kimberly M Cirelli, Shane Crotty
Vaccine elicitation of protective antibody responses has proved difficult for a number of important human pathogens, including HIV-1. The amount of somatic hypermutation associated with the development of broadly neutralizing antibodies against HIV has not been achieved using conventional immunization strategies. An underexplored aspect of vaccine design is modulation of antigen kinetics. Immunization strategies with extended antigen availability have recently been shown to enhance humoral responses. In this review, we explore the mechanisms through which sustained antigen availability can enhance germinal center responses and the potency of antibody responses...
July 21, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28735140/isolated-subcallosal-artery-infarction-secondary-to-localised-cerebral-vasospasm-of-anterior-communicating-artery-complex-following-subarachnoid-haemorrhage
#15
Santhosh Kumar Kannath, Virender Malik, Jayadevan Enakshy Rajan
BACKGROUND: Subcallosal artery (ScA) infarction is a well-recognised, but uncommon complication of surgical treatment of anterior communicating artery (ACOM) aneurysms. CASE DESCRIPTION: An elderly man presented with massive subarachnoid haemorrhage due to left posterior communicating artery aneurysm with thick clots in the anterior interhemispheric fissure. The aneurysm was coiled with balloon protection and later, on the fifth day of ictus, the patient became acutely confused and developed memory disturbances...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28734837/neural-reuse-of-action-perception-circuits-for-language-concepts-and-communication
#16
REVIEW
Friedemann Pulvermüller
Neurocognitive and neurolinguistics theories make explicit statements relating specialized cognitive and linguistic processes to specific brain loci. These linking hypotheses are in need of neurobiological explanation. Recent mathematical models of human language mechanisms constrained by fundamental neuroscience principles and established knowledge about comparative neuroanatomy offer explanations for where, when and how language is processed in the human brain. In these models, network structure and connectivity along with action- and perception-induced correlation of neuronal activity co-determine neurocognitive mechanisms...
July 19, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28734217/emotional-arousal-and-recognition-memory-are-differentially-reflected-in-pupil-diameter-responses-during-emotional-memory-for-negative-events-in-younger-and-older-adults
#17
Dorothea Hämmerer, Alexandra Hopkins, Matthew J Betts, Anne Maaß, Ray J Dolan, Emrah Düzel
A better memory for negative emotional events is often attributed to a conjoint impact of increased arousal and noradrenergic modulation (NA). A decline in NA during aging is well documented but its impact on memory function during aging is unclear. Using pupil diameter (PD) as a proxy for NA, we examined age differences in memory for negative events in younger (18-30 years) and older (62-83 years) adults based on a segregation of early arousal to negative events, and later retrieval-related PD responses...
June 30, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28733209/intervention-strength-does-not-differentially-affect-memory-reconsolidation-of-strong-memories
#18
Kevin van Schie, Suzanne C van Veen, Yanniek R Hendriks, Marcel A van den Hout, Iris M Engelhard
Recently, it has become clear that retrieval (i.e., reactivation) of consolidated memories may return these memories into a labile state before they are restored into long-term memory ('reconsolidation'). Using behavioral manipulations, reactivated memories can be disrupted via the mechanism of novel learning. In the present study, we investigated whether changing a strong memory during reconsolidation depends on the strength of novel learning. To test this, participants (N = 144) in six groups acquired a relatively strong memory on Day 1 by viewing and recalling a series of pictures three times...
July 18, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28732282/proficient-use-of-low-spatial-frequencies-facilitates-face-memory-but-shows-protracted-maturation-throughout-adolescence
#19
Judith C Peters, Chantal Kemner
Face perception is characterized by configural processing, which depends on visual information in the low spatial frequency (LSF) ranges. However, it is unclear whether LSF content is equally important for face memory. The present study investigated how face information in the low and high SF range plays a role in the configural encoding of faces for short-term and long-term recall. Moreover, we examined how SF-dependent face memorization develops in female adolescence, by comparing children (9-10-year-olds), adolescents (12-13-year-olds and 15-16-year-olds), and young adults (21-32-year-olds)...
July 18, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28731445/colivelin-ameliorates-impairments-in%C3%A2-cognitive-behaviors-and-synaptic-plasticity-in-app-ps1-transgenic-mice
#20
Meina Wu, Hui Shi, Yexin He, Li Yuan, Xuesong Qu, Jun Zhang, Zhaojun Wang, Hongyan Cai, Jinshun Qi
Alzheimer's disease (AD) is the most common cause of dementia, and effective therapeutics are lacking. Colivelin (CLN), a novel, strong humanin derivative, is effective in vitro in preventing cell death induced by AD-causative genes and amyloid-β protein (Aβ) even at a low concentration. We recently demonstrated that intrahippocampal injection of CLN prevents Aβ25-35-induced deficits in spatial memory and synaptic plasticity in normal rats. Here, we further observed the effects of chronically intranasally (i...
July 19, 2017: Journal of Alzheimer's Disease: JAD
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