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Visual short term memory

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https://www.readbyqxmd.com/read/29154628/the-bandwidth-of-vwm-consolidation-varies-with-the-stimulus-feature-evidence-from-event-related-potentials
#1
Renning Hao, Mark W Becker, Chaoxiong Ye, Qiang Liu, Taosheng Liu
Our previous work suggests that 2 colors can be consolidated into visual short-term memory (VSTM) in parallel without a loss of memory precision, whereas consolidation of 2 orientations is performed in a strictly serial manner. Those experiments compared VSTM performance for simultaneously and sequentially presented stimuli. However, there is still controversy about whether the bandwidth for consolidation is determined by the type of information. To further investigate this issue, here we measured electroencephalography while participants attempted to consolidate 1, 2 or 4 simultaneously presented colors (Experiment 1) or orientations (Experiment 2) under limited presentation times...
November 20, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/29154491/does-differential-visual-exploration-contribute-to-visual-memory-impairments-in-22q11-2-microdeletion-syndrome
#2
M Bostelmann, B Glaser, A Zaharia, S Eliez, M Schneider
BACKGROUND: Chromosome 22q11.2 microdeletion syndrome (22q11.2DS) is a genetic syndrome characterised by a unique cognitive profile. Individuals with the syndrome present several non-verbal deficits, including visual memory impairments and atypical exploration of visual information. In this study, we seek to understand how visual attention may contribute to memory difficulties in 22q11.2DS by tracking eye movements during the encoding phase of a visual short-term memory task. METHOD: Eye movements were recorded during a computerised version of the multiple-choice Benton Visual Retention Test, which consisted of exploring and then recognising complex visual stimuli...
December 2017: Journal of Intellectual Disability Research: JIDR
https://www.readbyqxmd.com/read/29152735/6%C3%A2-hz-corneal-kindling-in-mice-triggers-neurobehavioral-comorbidities-accompanied-by-relevant-changes-in-c-fos-immunoreactivity-throughout-the-brain
#3
Giulia Albertini, Laura Walrave, Thomas Demuyser, Ann Massie, Dimitri De Bundel, Ilse Smolders
OBJECTIVE: Besides seizures, patients with epilepsy are affected by a variety of cognitive and psychiatric comorbidities that further impair their quality of life. The present study provides an in-depth characterization of the behavioral alterations induced by 6 Hz corneal kindling. Furthermore, we correlate these behavioral changes to alterations in c-Fos protein expression throughout the brain following kindling. METHODS: Adolescent male Naval Medical Research Institute (NMRI) mice were kindled via repetitive subconvulsive 6 Hz corneal stimulations until they reached the fully kindled state (defined as 10 consecutive generalized seizures)...
November 20, 2017: Epilepsia
https://www.readbyqxmd.com/read/29140731/recovery-of-an-injured-cingulum-concurrent-with-improvement-of-short-term-memory-in-a-patient-with-mild-traumatic-brain-injury
#4
Sung Ho Jang, Seong Ho Kim, Jeong Pyo Seo
OBJECTIVES: We reported on a patient with mild traumatic brain injury (TBI) who showed recovery of an injured cingulum concurrent with improvement of short-term memory, which was demonstrated on follow-up diffusion tensor tractography (DTT). METHODS: A 55-year-old male patient suffered head trauma resulting from falling from approximately 2 m while working at a construction site. The patient showed mild memory impairment (especially short-term memory impairment) at 3 months after onset: Memory Assessment Scale (global memory: 95 (37%ile), short-term memory: 75 (5%ile), verbal memory: 80 (9%ile) and visual memory: 112 (79%ile))...
November 15, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29128118/associations-between-inflammatory-markers-and-cognitive-function-in-breast-cancer-patients-receiving-chemotherapy
#5
AnnaLynn M Williams, Raven Shah, Michelle Shayne, Alissa J Huston, Marcia Krebs, Nicole Murray, Bryan D Thompson, Kassandra Doyle, Jenna Korotkin, Edwin van Wijngaarden, Sharon Hyland, Jan A Moynihan, Deborah A Cory-Slechta, Michelle C Janelsins
BACKGROUND: Cancer-related cognitive impairment (CRCI) is often related to chemotherapy. Increased chronic inflammation is believed to play a key role in the development of CRCI related to chemotherapy but studies assessing this hypothesis specifically in patients receiving chemotherapy are rare. METHODS: We assessed several cognitive domains using the Cambridge Neuropsychological Test Automated Battery (CANTAB) in twenty-two breast cancer patients currently receiving chemotherapy...
October 18, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29116821/memory-and-linguistic-executive-functions-of-children-with-borderline-intellectual-functioning
#6
Andrea B Água Dias, Cristina P Albuquerque, Mário R Simões
Children with Borderline Intellectual Functioning (BIF) have received a minimal amount of research attention and have been studied in conjunction with Intellectual and Developmental Disabilities. The present study intends to broaden the knowledge of BIF, by analyzing domains such as verbal memory and visual memory, as well as tasks that rely simultaneously on memory, executive functions, and language. A cross-sectional, comparison study was carried out between a group of 40 children with BIF (mean age = 10...
November 8, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/29111783/would-you-say-yes-in-the-evening-time-of-day-effect-on-response-bias-in-four-types-of-working-memory-recognition-tasks
#7
Koryna Lewandowska, Barbara Wachowicz, Tadeusz Marek, Halszka Oginska, Magdalena Fafrowicz
Across a wide range of tasks, cognitive functioning is affected by circadian fluctuations. In this study, we investigated diurnal variations of working memory performance, taking into account not only hits and errors rates, but also sensitivity (d') and response bias (c) indexes (established by signal detection theory). Fifty-two healthy volunteers performed four experimental tasks twice - in the morning and in the evening (approximately 1 and 10 h after awakening). All tasks were based on Deese-Roediger-McDermott paradigm version dedicated to study working/short-term memory distortions...
November 7, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29089878/protocol-for-short-and-longer-term-spatial-learning-and-memory-in-mice
#8
Emily F Willis, Perry F Bartlett, Jana Vukovic
Studies on the role of the hippocampus in higher cognitive functions such as spatial learning and memory in rodents are reliant upon robust and objective behavioral tests. This protocol describes one such test-the active place avoidance (APA) task. This behavioral task involves the mouse continuously integrating visual cues to orientate itself within a rotating arena in order to actively avoid a shock zone, the location of which remains constant relative to the room. This protocol details the step-by-step procedures for a novel paradigm of the hippocampal-dependent APA task, measuring acquisition of spatial learning during a single 20-min trial (i...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29079320/cognitive-dysfunction-associated-with-aluminum-hydroxide-induced-macrophagic-myofasciitis-a-reappraisal-of-neuropsychological-profile
#9
Mehdi Aoun Sebaiti, Paul Kauv, Anaïs Charles-Nelson, Axel Van Der Gucht, Paul Blanc-Durand, Emmanuel Itti, Romain K Gherardi, Anne-Catherine Bachoud-Levi, François Jérôme Authier
Patients with macrophagic myofasciitis (MMF) present with diffuse arthromyalgias, chronic fatigue, and cognitive disorder. Representative features of MMF-associated cognitive dysfunction include attentional dysfunction, dysexecutive syndrome, visual memory deficit and left ear extinction. Our study aims to reevaluate the neuropsychological profile of MMF. 105 unselected consecutive MMF patients were subjected to a neuropsychological battery of screen short term and long-term memory, executive functions, attentional abilities, instrumental functions and dichotic listening...
October 6, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29063704/way-finding-strategies-of-blind-persons-in-urban-scale
#10
Didem Kan-Kilic, Fehmi Dogan
The aim of this study was to determine whether urban environments with different prominent sensory inputs have an impact on the way-finding strategies of blind people and to identify these impacts, where applicable. We specifically investigated how blind people use their senses to compensate for the lack of visual information and how the priority of senses changes according to the urban context. The participants of the study consisted of nine congenitally blind individuals and the study took place in two urban settings: a dense urban district, Kemeralti district in İzmir; and an urban park, the İzmir Fair Park...
October 24, 2017: PsyCh Journal
https://www.readbyqxmd.com/read/29061290/beyond-time-and-space-the-effect-of-a-lateralized-sustained-attention-task-and-brain-stimulation-on-spatial-and-selective-attention
#11
Nir Shalev, Linde De Wandel, Paul Dockree, Nele Demeyere, Magdalena Chechlacz
The Theory of Visual Attention (TVA) provides a mathematical formalisation of the "biased competition" account of visual attention. Applying this model to individual performance in a free recall task allows the estimation of 5 independent attentional parameters: visual short-term memory (VSTM) capacity, speed of information processing, perceptual threshold of visual detection; attentional weights representing spatial distribution of attention (spatial bias), and the top-down selectivity index. While the TVA focuses on selection in space, complementary accounts of attention describe how attention is maintained over time, and how temporal processes interact with selection...
October 3, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29021617/imaging-mass-spectrometry-analysis-of-ubiquinol-localization-in-the-mouse-brain-following-short-term-administration
#12
Yukina Tatsuta, Kazuaki Kasai, Chitose Maruyama, Yoshimitsu Hamano, Kazuhiko Matsuo, Hajime Katano, Shu Taira
We analyzed the localization of ubiquinol, the reduced form of coenzyme Q10 (Re-CoQ10), in mouse brain sections using matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance imaging mass spectrometry (IMS) to evaluate the effect of dietary Re-CoQ10 in mouse brain. Mice were orally administered Re-CoQ10 for 14 days and brain Re-CoQ10 content was subsequently quantified using liquid chromatography-mass spectrometry. IMS was employed to visualize Re-CoQ10 at a resolution of 150 μm in the mouse brain...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29017445/protein-remote-homology-detection-based-on-bidirectional-long-short-term-memory
#13
Shumin Li, Junjie Chen, Bin Liu
BACKGROUND: Protein remote homology detection plays a vital role in studies of protein structures and functions. Almost all of the traditional machine leaning methods require fixed length features to represent the protein sequences. However, it is never an easy task to extract the discriminative features with limited knowledge of proteins. On the other hand, deep learning technique has demonstrated its advantage in automatically learning representations. It is worthwhile to explore the applications of deep learning techniques to the protein remote homology detection...
October 10, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28992036/associations-between-sedentary-behaviours-and-cognitive-function-cross-sectional-and-prospective-findings-from-the-uk-biobank
#14
Kishan Bakrania, Charlotte L Edwardson, Kamlesh Khunti, Stephan Bandelow, Melanie J Davies, Thomas Yates
We investigate the cross-sectional and prospective associations between different sedentary behaviours and cognitive function in a large sample of UK Biobank adults. Baseline data were available on 502,643 participants (years 2006-2010). Cognitive tests included prospective memory [n = 171,585 (baseline only)], visual-spatial memory [round 1 (n = 483,832); round 2 (n = 482,762)], fluid intelligence [n = 165,492], and short-term numeric memory [n = 50,370]. After a mean period of 5.3-years, between 12,091 and 114,373 participants also provided follow-up cognitive data...
July 13, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28984526/the-dorsal-attention-network-reflects-both-encoding-load-and-top-down-control-during-working-memory
#15
Steve Majerus, Frédéric Péters, Marion Bouffier, Nelson Cowan, Christophe Phillips
The dorsal attention network is consistently involved in verbal and visual working memory (WM) tasks and has been associated with task-related, top-down control of attention. At the same time, WM capacity has been shown to depend on the amount of information that can be encoded in the focus of attention independently of top-down strategic control. We examined the role of the dorsal attention network in encoding load and top-down memory control during WM by manipulating encoding load and memory control requirements during a short-term probe recognition task for sequences of auditory (digits, letters) or visual (lines, unfamiliar faces) stimuli...
October 6, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28981609/neural-evidence-for-non-conscious-working-memory
#16
Fredrik Bergström, Johan Eriksson
Recent studies have found that non-consciously perceived information can be retained for several seconds, a feat that has been attributed to non-conscious working memory processes. However, these studies have mainly relied on subjective measures of visual experience, and the neural processes responsible for non-conscious short-term retention remains unclear. Here we used continuous flash suppression to render stimuli non-conscious in a delayed match-to-sample task together with fMRI to investigate the neural correlates of non-conscious short-term (5-15 s) retention...
August 2, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28974153/image-memorability-across-longer-time-intervals
#17
Lore Goetschalckx, Pieter Moors, Johan Wagemans
You may find some images easier to remember than others. Recent studies of visual memory have found remarkable levels of consistency for this inter-item variability across observers, suggesting that memorability can be considered an intrinsic image property. The current study replicated and extended previous results, while adopting a more traditional visual long-term memory task with retention intervals of 20 min, one day, and one week, as opposed to the previously used repeat-detection task, which typically relied on short retention intervals (5 min)...
October 3, 2017: Memory
https://www.readbyqxmd.com/read/28968811/human-parahippocampal-cortex-supports-spatial-binding-in-visual-working-memory
#18
Neil Michael Dundon, Mohammad Zia Ul Haq Katshu, Bronson Harry, Daniel Roberts, E Charles Leek, Paul Downing, Ayelet Sapir, Craig Roberts, Giovanni d'Avossa
Studies investigating the functional organization of the medial temporal lobe (MTL) suggest that parahippocampal cortex (PHC) generates representations of spatial and contextual information used by the hippocampus in the formation of episodic memories. However, evidence from animal studies also implicates PHC in spatial binding of visual information held in short term, working memory. Here we examined a 46-year-old man (P.J.), after he had recovered from bilateral medial occipitotemporal cortex strokes resulting in ischemic lesions of PHC and hippocampal atrophy, and a group of age-matched healthy controls...
September 15, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28966559/an-eye-tracking-investigation-of-color-location-binding-in-infants-visual-short-term-memory
#19
Lisa M Oakes, Heidi A Baumgartner, Shipra Kanjlia, Steven J Luck
Two experiments examined 8- and 10-month-old infants' (N = 71) binding of object identity (color) and location information in visual short-term memory (VSTM) using a one-shot change detection task. Building on previous work using the simultaneous streams change detection task, we confirmed that 8- and 10-month-old infants are sensitive to changes in binding between identity and location in VSTM. Further, we demonstrated that infants recognize specifically what changed in these events. Thus, infants' VSTM for binding is robust and can be observed in different procedures and with different stimuli...
September 2017: Infancy: the Official Journal of the International Society on Infant Studies
https://www.readbyqxmd.com/read/28954996/usefulness-of-a-novel-higher-brain-dysfunction-screening-test-for-evaluating-higher-brain-function-in-healthy-persons
#20
Akemi Hioka, Yoshifumi Mizobuchi, Yoshiteru Tada, Kyoko Nishi, Yasuhiko Shirayama, Shinsuke Katoh, Naoki Akazawa, Ryuji Kaji, Yutaka Ojima, Shinji Nagahiro
To accurately and rapidly screen for higher brain dysfunction, we developed a screening test named the "higher brain dysfunction screening test" (HIBRID-ST). Previous studies have reported a decrease in higher brain function with age. However, whether HIBRID-ST can detect a decrease in higher brain function in healthy persons remains unclear. We aimed to assess the usefulness of HIBRID-ST for evaluating higher brain function in healthy persons. We recruited 60 persons without physiological abnormalities and divided them into six equal groups based on their age (20s-70s)...
2017: Journal of Medical Investigation: JMI
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