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https://www.readbyqxmd.com/read/28077721/temporal-expectations-guide-dynamic-prioritization-in-visual-working-memory-through-attenuated-%C3%AE-oscillations
#1
Freek van Ede, Marcel Niklaus, Anna C Nobre
: Although working memory is generally considered a highly dynamic mnemonic store, popular laboratory tasks used to understand its psychological and neural mechanisms (such as change detection and continuous reproduction) often remain relatively "static," involving the retention of a set number of items throughout a shared delay interval. In the current study, we investigated visual working memory in a more dynamic setting, and assessed the following: (1) whether internally guided temporal expectations can dynamically and reversibly prioritize individual mnemonic items at specific times at which they are deemed most relevant; and (2) the neural substrates that support such dynamic prioritization...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28074590/improving-clinical-handover-in-a-paediatric-ward-implications-for-nursing-management
#2
Trudi Mannix, Yvonne Parry, Allison Roderick
AIM: To describe how nursing staff in a paediatric ward improved the conduct of clinical handover, using a practise development approach. BACKGROUND: ISBAR (Identify, Situation, Background, Assessment and Recommendation) is a mnemonic tool to aid the safe transfer of patient information in clinical handover. The nurses identified the need to improve the use of ISBAR, and other issues related to handover that could compromise patient safety and constrain family-centred care...
January 10, 2017: Journal of Nursing Management
https://www.readbyqxmd.com/read/28067902/separate-elements-of-episodic-memory-subserved-by-distinct-hippocampal-prefrontal-connections
#3
Gareth R I Barker, Paul J Banks, Hannah Scott, G Scott Ralph, Kyriacos A Mitrophanous, Liang-Fong Wong, Zafar I Bashir, James B Uney, E Clea Warburton
Episodic memory formation depends on information about a stimulus being integrated within a precise spatial and temporal context, a process dependent on the hippocampus and prefrontal cortex. Investigations of putative functional interactions between these regions are complicated by multiple direct and indirect hippocampal-prefrontal connections. Here application of a pharmacogenetic deactivation technique enabled us to investigate the mnemonic contributions of two direct hippocampal-medial prefrontal cortex (mPFC) pathways, one arising in the dorsal CA1 (dCA1) and the other in the intermediate CA1 (iCA1)...
January 9, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28067469/visual-working-memory-resources-are-best-characterized-as-dynamic-quantifiable-mnemonic-traces
#4
Bella Z Veksler, Rachel Boyd, Christopher W Myers, Glenn Gunzelmann, Hansjörg Neth, Wayne D Gray
Visual working memory (VWM) is a construct hypothesized to store a small amount of accurate perceptual information that can be brought to bear on a task. Much research concerns the construct's capacity and the precision of the information stored. Two prominent theories of VWM representation have emerged: slot-based and continuous-resource mechanisms. Prior modeling work suggests that a continuous resource that varies over trials with variable capacity and a potential to make localization errors best accounts for the empirical data...
January 9, 2017: Topics in Cognitive Science
https://www.readbyqxmd.com/read/28067192/effect-of-retrieval-practice-on-short-term-and-long-term-retention-in-hiv-individuals
#5
Gunes Avci, Steven P Woods, Marizela Verduzco, David P Sheppard, James F Sumowski, Nancy D Chiaravalloti, John DeLuca
OBJECTIVES: Episodic memory deficits are both common and impactful among persons infected with HIV; however, we know little about how to improve such deficits in the laboratory or in real life. Retrieval practice, by which retrieval of newly learned material improves subsequent recall more than simple restudy, is a robust memory boosting strategy that is effective in both healthy and clinical populations. In this study, we investigated the benefits of retrieval practice in 52 people living with HIV and 21 seronegatives...
January 9, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28062825/global-family-medicine-a-universal-mnemonic
#6
William B Ventres
In this essay, I borrow the idea of universal precautions from infection control and suggest that family physicians use a set of considerations, based on the mnemonic UNIVERSAL, to nurture cultural humility, enter a metaphoric "space-in-between" in cross-cultural encounters, and foster global fluency. These UNIVERSAL considerations I base on my experiences in global family medicine, attending to economically poor and socially marginalized patients in both international and domestic settings. They are informed by readings in transcultural psychiatry, medical anthropology, development studies, and primary care...
January 2017: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/28060373/small-round-blue-cell-tumors-of-the-sinonasal-tract-a-differential-diagnosis-approach
#7
Lester Dr Thompson
One of the most challenging diagnostic categories within tumors of the sinonasal tract is the small round blue cell tumors. Biopsies are usually small and limited, resulting in considerable diagnostic difficulty for practicing surgical pathologists. These tumors share several overlapping histologic and immunophenotypic findings while also showing considerable variation within and between cases. Specific tumor site of origin, imaging findings, and clinical findings must be combined with the histology and pertinent ancillary studies if the correct diagnosis is to be reached...
January 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28057931/the-oprm1-a118g-polymorphism-modulates-the-descending-pain-modulatory-system-for-individual-pain-experience-in-young-women-with-primary-dysmenorrhea
#8
Shyh-Yuh Wei, Li-Fen Chen, Ming-Wei Lin, Wei-Chi Li, Intan Low, Ching-Ju Yang, Hsiang-Tai Chao, Jen-Chuen Hsieh
The mu-opioid receptor (OPRM1) A118G polymorphism underpins different pain sensitivity and opioid-analgesic outcome with unclear effect on the descending pain modulatory system (DPMS). Primary dysmenorrhea (PDM), the most prevalent gynecological problem with clear painful and pain free conditions, serves as a good clinical model of spontaneous pain. The objective of this imaging genetics study was therefore to explore if differences in functional connectivity (FC) of the DPMS between the OPRM1 A118G polymorphisms could provide a possible explanation for the differences in pain experience...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28028221/stable-population-coding-for-working-memory-coexists-with-heterogeneous-neural-dynamics-in-prefrontal-cortex
#9
John D Murray, Alberto Bernacchia, Nicholas A Roy, Christos Constantinidis, Ranulfo Romo, Xiao-Jing Wang
Working memory (WM) is a cognitive function for temporary maintenance and manipulation of information, which requires conversion of stimulus-driven signals into internal representations that are maintained across seconds-long mnemonic delays. Within primate prefrontal cortex (PFC), a critical node of the brain's WM network, neurons show stimulus-selective persistent activity during WM, but many of them exhibit strong temporal dynamics and heterogeneity, raising the questions of whether, and how, neuronal populations in PFC maintain stable mnemonic representations of stimuli during WM...
December 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28025980/cracking-the-mnemonic-code
#10
Eva Zita Patai, Hugo J Spiers
No abstract text is available yet for this article.
December 27, 2016: Nature Neuroscience
https://www.readbyqxmd.com/read/28018227/bidirectional-effects-of-cannabidiol-on-contextual-fear-memory-extinction
#11
Chenchen Song, Carl W Stevenson, Francisco S Guimaraes, Jonathan L C Lee
Cannabidiol (CBD) has been established to have both acute and long-lasting effects to reduce fear memory expression. The long-lasting impact might be mediated by an enhancement of memory extinction or an impairment of memory reconsolidation. Here, we directly compared the effects of i.p. injections of cannabidiol (10 mg/kg) with those of the NMDA receptor antagonist MK-801 (0.1 mg/kg) and partial agonist D-cycloserine (DCS; 15 mg/kg) in order to determine the mnemonic basis of long-term fear reduction. We showed that under conditions of strong fear conditioning, CBD reduced contextual fear memory expression both acutely during the extinction session as well as later at a fear retention test...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28004951/age-related-impairment-on-a-forced-choice-version-of-the-mnemonic-similarity-task
#12
Derek J Huffman, Craig E L Stark
Previous studies from our lab have indicated that healthy older adults are impaired in their ability to mnemonically discriminate between previously viewed objects and similar lure objects in the Mnemonic Similarity Task (MST). These studies have used either old/similar/new or old/new test formats. The forced-choice test format (e.g., "Did you see object A or object A' during the encoding phase?") relies on different assumptions than the old/new test format (e.g., "Did you see this object during the encoding phase?"); hence, converging evidence from these approaches would bolster the conclusion that healthy aging is accompanied by impaired performance on the MST...
December 22, 2016: Behavioral Neuroscience
https://www.readbyqxmd.com/read/27997994/deciding-what-is-possible-and-impossible-following-hippocampal-damage-in-humans
#13
Cornelia McCormick, Clive R Rosenthal, Thomas D Miller, Eleanor A Maguire
There is currently much debate about whether the precise role of the hippocampus in scene processing is predominantly constructive, perceptual, or mnemonic. Here, we developed a novel experimental paradigm designed to control for general perceptual and mnemonic demands, thus enabling us to specifically vary the requirement for constructive processing. We tested the ability of patients with selective bilateral hippocampal damage and matched control participants to detect either semantic (e.g., an elephant with butterflies for ears) or constructive (e...
December 20, 2016: Hippocampus
https://www.readbyqxmd.com/read/27997992/acute-moderate-exercise-improves-mnemonic-discrimination-in-young-adults
#14
Kazuya Suwabe, Kazuki Hyodo, Kyeongho Byun, Genta Ochi, Michael A Yassa, Hideaki Soya
Increasing evidence suggests that regular moderate exercise increases neurogenesis in the dentate gyrus (DG) of the hippocampus and improves memory functions in both humans and animals. The DG is known to play a role in pattern separation, which is the ability to discriminate among similar experiences, a fundamental component of episodic memory. While long-term voluntary exercise improves pattern separation, there is little evidence of alterations in DG function after an acute exercise session. Our previous studies showing acute moderate exercise-enhanced DG activation in rats, and acute moderate exercise-enhanced prefrontal activation and executive function in humans, led us to postulate that acute moderate exercise may also activate the hippocampus, including more specifically the DG, thus improving pattern separation...
December 20, 2016: Hippocampus
https://www.readbyqxmd.com/read/27995360/a-european-society-of-paediatric-and-neonatal-intensive-care-espnic-survey-of-european-critical-care-management-of-young-people
#15
R Tuckwell, D Wood, S Mansfield-Sturgess, J Brierley
: Adolescents have specific healthcare needs distinct from adults or younger children secondary to anatomical, physiological and socio-behavioural differences. Healthcare providers have been slow to address this, leading the UK Department of Health (2011) to publish 'You're Welcome' quality criteria for services for young people. (In the UK, the term young people is preferred to adolescent.) These generic criteria poorly fit the critical care environment, omitting key issues whilst insisting upon irrelevant standards...
December 19, 2016: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27991029/the-electrophysiological-signature-of-remember-know-is-confounded-with-memory-strength-and-cannot-be-interpreted-as-evidence-for-dual-process-theory-of-recognition
#16
Noam Brezis, Zohar Z Bronfman, Galit Yovel, Yonatan Goshen-Gottstein
The quantity and nature of the processes underlying recognition memory remains an open question. A majority of behavioral, neuropsychological, and brain studies have suggested that recognition memory is supported by two dissociable processes: recollection and familiarity. It has been conversely argued, however, that recollection and familiarity map onto a single continuum of mnemonic strength and hence that recognition memory is mediated by a single process. Previous electrophysiological studies found marked dissociations between recollection and familiarity, which have been widely held as corroborating the dual-process account...
February 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27984812/sex-specific-associations-of-testosterone-with-prefrontal-hippocampal-development-and-executive-function
#17
Tuong-Vi Nguyen, Jimin Lew, Matthew D Albaugh, Kelly N Botteron, James J Hudziak, Vladimir S Fonov, D Louis Collins, Simon Ducharme, James T McCracken
Testosterone is thought to play a crucial role in mediating sexual differentiation of brain structures. Examinations of the cognitive effects of testosterone have also shown beneficial and potentially sex-specific effects on executive function and mnemonic processes. Yet these findings remain limited by an incomplete understanding of the critical timing and brain regions most affected by testosterone, the lack of documented links between testosterone-related structural brain changes and cognition, and the difficulty in distinguishing the effects of testosterone from those of related sex steroids such as of estradiol and dehydroepiandrosterone (DHEA)...
December 8, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27981704/the-eye-of-the-retriever-developing-episodic-memory-mechanisms-in-preverbal-infants-assessed-through-pupil-dilation
#18
Kahl Hellmer, Hedvig Söderlund, Gustaf Gredebäck
Studying memory in infants can be challenging, as they cannot express their subjective recollection verbally. In this study we use a novel method with which we can assess episodic recognition memory through pupillometry, using identical procedures and stimuli for infants and adults. In three experiments of 4- and 7-month-old infants, and adults we show that the adult pupillary response is larger to previously seen than to never seen items (old/new effect). Pupil dilations index subjective memory experience in adults, producing distinct pupil dilations to items judged as remembered, familiar, and new, regardless of actual previous exposure (Experiment 1)...
December 15, 2016: Developmental Science
https://www.readbyqxmd.com/read/27933668/the-role-of-the-hippocampus-in-generalizing-configural-relationships
#19
Sam C Berens, Chris M Bird
The hippocampus has been implicated in integrating information across separate events in support of mnemonic generalizations. These generalizations may be underpinned by processes at both encoding (linking similar information across events) and retrieval ("on-the-fly" generalization). However, the relative contribution of the hippocampus to encoding- and retrieval-based generalizations is poorly understood. Using fMRI in humans, we investigated the hippocampal role in gradually learning a set of spatial discriminations and subsequently generalizing them in an acquired equivalence task...
December 9, 2016: Hippocampus
https://www.readbyqxmd.com/read/27924682/developmental-changes-in-consistency-of-autobiographical-memories-adolescents-and-young-adults-repeated-recall-of-recent-and-distance-events
#20
Marina Larkina, Natalie A Merrill, Patricia J Bauer
Autobiographical memories contribute continuity and stability to one's self yet they also are subject to change: they can be forgotten or be inconsistently remembered and reported. In the present research, we compared the consistency of two reports of recent and distant personal events in adolescents (12- to 14-year-olds) and young adults (18- to 23-year-olds). In line with expectations of greater mnemonic consistency among young adults relative to adolescents, adolescents reported the same events 80% of the time compared with 90% consistency among young adults; the significant difference disappeared after taking into consideration narrative characteristics of individual memories...
December 7, 2016: Memory
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