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https://www.readbyqxmd.com/read/28934526/mechanisms-of-memory-retrieval-in-slow-wave-sleep
#1
Scott A Cairney, Justyna M Sobczak, Shane Lindsay, M Gareth Gaskell
Study Objectives: Memories are strengthened during sleep. The benefits of sleep for memory can be enhanced by re-exposing the sleeping brain to auditory cues; a technique known as targeted memory reactivation (TMR). Prior studies have not assessed the nature of the retrieval mechanisms underpinning TMR: the matching process between auditory stimuli encountered during sleep and previously encoded memories. We carried out two experiments to address this issue. Methods: In Experiment 1, participants associated words with verbal and nonverbal auditory stimuli before an overnight interval in which subsets of these stimuli were replayed in slow-wave sleep...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28933901/motivation-to-avoid-loss-improves-implicit-skill-performance
#2
Danbee Chon, Kelsey R Thompson, Paul J Reber
Implicit learning reflects learning from experience that occurs without intention or awareness of the information acquired and is hypothesized to contribute to skill acquisition by improving performance with practice. The role of motivation has not been examined because this kind of memory is represented outside awareness. We manipulated motivation (approach/avoidance) and type of feedback (positive/negative) to measure how these affected a well-studied task of implicit sequence learning. Across 2 experiments, we found a consistent effect that motivation to avoid loss led to much higher levels of sequence-specific task performance...
September 21, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28933609/dual-task-training-in-persons-with-multiple-sclerosis-a-feasability-randomized-controlled-trial
#3
Jacob J Sosnoff, Douglas A Wajda, Brian M Sandroff, Kathleen L Roeing, JongHun Sung, Robert W Motl
OBJECTIVE: To determine the feasibility of dual task training in persons with Multiple Sclerosis. DESIGN: Randomized, single-blinded controlled trial. SETTING: University research laboratory. PARTICIPANTS: A total of 234 individuals inquired about the investigation. After screening, 20 individuals with multiple sclerosis who self-reported problems with multitasking and were ambulatory volunteered for the investigation...
October 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28933314/effectiveness-of-a-low-support-remotely-accessible-cognitive-remediation-training-programme-for-chronic-psychosis-cognitive-functional-and-cortical-outcomes-from-a-single-blind-randomised-controlled-trial
#4
G Donohoe, R Dillon, A Hargreaves, O Mothersill, M Castorina, E Furey, A J Fagan, J F Meaney, B Fitzmaurice, B Hallahan, C McDonald, T Wykes, A Corvin, I H Robertson
BACKGROUND: Cognitive remediation (CR) training has emerged as a promising approach to improving cognitive deficits in schizophrenia and related psychosis. The limited availability of psychological services for psychosis is a major barrier to accessing this intervention however. This study investigated the effectiveness of a low support, remotely accessible, computerised working memory (WM) training programme in patients with psychosis. METHODS: Ninety patients were enrolled into a single blind randomised controlled trial of CR...
September 21, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28933254/the-efficacy-of-a-working-memory-training-in-substance-use-patients-a-randomized-double-blind-placebo-controlled-clinical-trial
#5
Sabine Wanmaker, Sophie Maaike Jorinde Leijdesdorff, Elke Geraerts, Ben J M van de Wetering, Peter J Renkema, Ingmar H A Franken
INTRODUCTION: Substance use disorder patients show impairments in working memory (WM) functioning. Previous findings indicate that a WM training results in improvements of working memory capacity (WMC) and in decreased clinical symptoms in a range of mental disorders, including alcohol use disorder. METHOD: The aim of the current study is to investigate the efficacy of a 24-session WM training in addition to treatment as usual on craving, WMC, substance use, impulsivity, attention bias, and psychopathology using a randomized double-blind placebo-controlled trial...
September 21, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28932907/effects-of-self-paced-interval-and-continuous-training-on-health-markers-in-women
#6
Luke J Connolly, Stephen J Bailey, Peter Krustrup, Jonathan Fulford, Chris Smietanka, Andrew M Jones
PURPOSE: To compare the effects of self-paced high-intensity interval and continuous cycle training on health markers in premenopausal women. METHODS: Forty-five inactive females were randomised to a high-intensity interval training (HIIT; n = 15), continuous training (CT; n = 15) or an inactive control (CON; n = 15) group. HIIT performed 5 × 5 min sets comprising repetitions of 30-s low-, 20-s moderate- and 10-s high-intensity cycling with 2 min rest between sets...
September 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28932180/hardware-efficient-on-line-learning-through-pipelined-truncated-error-backpropagation-in-binary-state-networks
#7
Hesham Mostafa, Bruno Pedroni, Sadique Sheik, Gert Cauwenberghs
Artificial neural networks (ANNs) trained using backpropagation are powerful learning architectures that have achieved state-of-the-art performance in various benchmarks. Significant effort has been devoted to developing custom silicon devices to accelerate inference in ANNs. Accelerating the training phase, however, has attracted relatively little attention. In this paper, we describe a hardware-efficient on-line learning technique for feedforward multi-layer ANNs that is based on pipelined backpropagation...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28931719/innate-colour-preference-individual-learning-and-memory-retention-in-the-ant-camponotus-blandus
#8
Ayse Yilmaz, Adrian G Dyer, Wolfgang Rössler, Johannes Spaethe
Ants are a well-characterized insect model for the study of visual learning and orientation, but the extent to which colour vision is involved in these tasks remains unknown. We investigated the colour preference, learning and memory retention of Camponotus blandus foragers under controlled laboratory conditions. Our results show that C. blandus foragers exhibit a strong innate preference for ultraviolet (UV, 365 nm) over blue (450 nm) and green (528 nm) wavelengths. The ants can learn to discriminate 365 nm from either 528 nm or 450 nm, independent of intensity changes...
September 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28931620/effects-of-physical-activity-on-poststroke-cognitive-function-a-meta-analysis-of-randomized-controlled-trials
#9
Lauren E Oberlin, Aashna M Waiwood, Toby B Cumming, Anna L Marsland, Julie Bernhardt, Kirk I Erickson
BACKGROUND AND PURPOSE: Despite the social, health, and economic burdens associated with cognitive impairment poststroke, there is considerable uncertainty about the types of interventions that might preserve or restore cognitive abilities. The objective of this systematic review and meta-analysis was to evaluate the effects of physical activity (PA) training on cognitive function poststroke and identify intervention and sample characteristics that may moderate treatment effects. METHODS: Randomized controlled trials examining the association between structured PA training and cognitive performance poststroke were identified using electronic databases EMBASE and MEDLINE...
September 20, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28929782/precious-memories-a-randomized-controlled-trial-on-the-effects-of-an-autobiographical-memory-intervention-delivered-by-trained-volunteers-in-residential-care-homes
#10
Gerben J Westerhof, Jojanneke Korte, Sander Eshuis, Ernst T Bohlmeijer
OBJECTIVES: This study assesses the effects of an autobiographical memory intervention on the prevention and reduction of depressive symptoms in older persons in residential care. Trained volunteers delivered the intervention. METHODS: A randomized controlled trial was carried out with depressive symptoms as the primary outcome. The experimental condition received the intervention Precious Memories one-on-one, whereas the control condition had individual unstructured contacts with a volunteer...
September 20, 2017: Aging & Mental Health
https://www.readbyqxmd.com/read/28929305/auditory-display-for-fluorescence-guided-open-brain-tumor-surgery
#11
David Black, Horst K Hahn, Ron Kikinis, Karin Wårdell, Neda Haj-Hosseini
PURPOSE: Protoporphyrin (PpIX) fluorescence allows discrimination of tumor and normal brain tissue during neurosurgery. A handheld fluorescence (HHF) probe can be used for spectroscopic measurement of 5-ALA-induced PpIX to enable objective detection compared to visual evaluation of fluorescence. However, current technology requires that the surgeon either views the measured values on a screen or employs an assistant to verbally relay the values. An auditory feedback system was developed and evaluated for communicating measured fluorescence intensity values directly to the surgeon...
September 19, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28928652/indomethacin-increases-neurogenesis-across-age-groups-and-improves-delayed-probe-trial-difference-scores-in-middle-aged-rats
#12
James A McGuiness, Rachel B Scheinert, Aditya Asokan, Vivien-Charlott Stadler, Christian S Lee, Asha Rani, Ashok Kumar, Thomas C Foster, Brandi K Ormerod
We tested whether indomethacin or rosiglitazone treatment could rejuvenate spatial ability and hippocampal neurogenesis in aging rats. Young (4 mo; n = 30), middle-aged (12 mo; n = 31), and aged (18 mo; n = 31) male Fischer 344 rats were trained and then tested in a rapid acquisition water maze task and then fed vehicle (500 μl strawberry milk), indomethacin (2.0 mg/ml), or rosiglitazone (8.0 mg/ml) twice daily for the remainder of the experiment. A week after drug treatment commenced, the rats were given 3 daily BrdU (50 mg/kg) injections to test whether age-related declines in neurogenesis were reversed...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28928378/efficient-and-controlled-domain-wall-nucleation-for-magnetic-shift-registers
#13
Oscar Alejos, Víctor Raposo, Luis Sanchez-Tejerina, Eduardo Martinez
Ultrathin ferromagnetic strips with high perpendicular anisotropy have been proposed for the development of memory devices where the information is coded in tiny domains separated by domain walls. The design of practical devices requires creating, manipulating and detecting domain walls in ferromagnetic strips. Recent observations have shown highly efficient current-driven domain wall dynamics in multilayers lacking structural symmetry, where the walls adopt a chiral structure and can be driven at high velocities...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927240/temporal-dynamics-of-hippocampal-and-medial-prefrontal-cortex-interactions-during-the-delay-period-of-a-working-memory-guided-foraging-task
#14
Maxym Myroshnychenko, Jeremy K Seamans, Anthony G Phillips, Christopher C Lapish
Connections between the hippocampus (HC) and medial prefrontal cortex (mPFC) are critical for working memory; however, the precise contribution of this pathway is a matter of debate. One suggestion is that it may stabilize retrospective memories of recently encountered task-relevant information. Alternatively, it may be involved in encoding prospective memories, or the internal representation of future goals. To explore these possibilities, simultaneous extracellular recordings were made from mPFC and HC of rats performing the delayed spatial win-shift on a radial maze...
September 12, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28925162/-effect-of-corydalis-rhizoma-and-l-tetrahydropalmatine-on-dopamine-system-of-hippocampus-and-striatum-in-morphine-induced-conditioned-place-preference-rats
#15
Shou-Yang Yu, Wei-Feng Bai, Ping Tu, Cheng-Kai Qiu, Pei-Run Yang, Su-Yuan Luo
To investigate the effects of Corydalis Rhizoma and L-tetrahydropalma-tine (L-THP) on the levels of dopamine neurotransmitter (DA), dopamine transporter (DAT) and the second dopamine receptor (D2R) in learning and memory-related brain areas, hippocampus and striatum, the DA, DAT and D2R were detected in conditioned place preference (CPP) rats suffered from morphine. And comparation the degree of similarity and consistency of the pharmacological effects was also studied. The rats were trained in black compartments and white ones (drug-paired compartment) with the increasing doses of morphine for 10 days (hypodermically injected from 10 mg•kg⁻¹ to 100 mg•kg⁻¹)...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28923313/functional-brain-networks-for-learning-predictive-statistics
#16
Joseph Giorgio, Vasilis M Karlaftis, Rui Wang, Yuan Shen, Peter Tino, Andrew Welchman, Zoe Kourtzi
Making predictions about future events relies on interpreting streams of information that may initially appear incomprehensible. This skill relies on extracting regular patterns in space and time by mere exposure to the environment (i.e., without explicit feedback). Yet, we know little about the functional brain networks that mediate this type of statistical learning. Here, we test whether changes in the processing and connectivity of functional brain networks due to training relate to our ability to learn temporal regularities...
August 18, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28922999/pattern-of-near-transfer-effects-following-working-memory-training-with-a-dual-n-back-task
#17
Anna Soveri, Eric P A Karlsson, Otto Waris, Petra Grönholm-Nyman, Matti Laine
In a randomized controlled trial, we investigated the pattern of near transfer effects of working memory (WM) training with an adaptive auditory-visuospatial dual n-back training task in healthy young adults. The results revealed significant task-specific transfer to an untrained single n-back task, and more general near transfer to a WM updating composite score plus a nearly significant effect on a composite score measuring interference control in WM. No transfer effects were seen on Active or Passive WM composites...
July 2017: Experimental Psychology
https://www.readbyqxmd.com/read/28922158/tailored-and-adaptive-computerized-cognitive-training-in-older-adults-at-risk-for-dementia-a-randomized-controlled-trial
#18
Alex Bahar-Fuchs, Shannon Webb, Lauren Bartsch, Linda Clare, George Rebok, Nicolas Cherbuin, Kaarin J Anstey
BACKGROUND: Computerized Cognitive Training (CCT) has been shown to improve cognitive function in older adults with mild cognitive impairment (MCI) or mood-related neuropsychiatric symptoms (MrNPS), but many questions remain unresolved. OBJECTIVE: To evaluate the extent to which CCT benefits older adults with both MCI and MrNPS, and its effects on meta-cognitive and non-cognitive outcomes, as well as establish whether adapting difficulty levels and tailoring to individuals' profile is superior to generic training...
September 11, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28922154/atrial-fibrillation-is-independently-associated-with-cognitive-impairment-after-ischemic-stroke
#19
Russell Jude Chander, Levinia Lim, Sagarika Handa, Shaun Hiu, Angeline Choong, Xuling Lin, Rajinder Singh, Daniel Oh, Nagaendran Kandiah
BACKGROUND: While atrial fibrillation (AF) is an important risk factor for ischemic strokes and mild cognitive impairment (MCI) in Alzheimer's disease, the association between AF and post-stroke cognitive impairment (PSCI), and the factors mediating this association, is unclear. OBJECTIVE: To investigate the role of AF in PSCI, especially in relation to other markers of cerebrovascular disease. METHODS: 445 subjects with mild ischemic stroke without pre-stroke cognitive decline were assessed 3-6 months post-stroke for cognitive deficits...
September 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28921856/disruption-of-perineuronal-nets-increases-the-frequency-of-sharp-wave-ripple-events
#20
ZhiYong Sun, P Lorenzo Bozzelli, Adam Caccavano, Megan Allen, Jason Balmuth, Stefano Vicini, Jian-Young Wu, Katherine Conant
Hippocampal sharp wave ripples (SWRs) represent irregularly occurring synchronous neuronal population events that are observed during phases of rest and slow wave sleep. SWR activity that follows learning involves sequential replay of training-associated neuronal assemblies and is critical for systems level memory consolidation. SWRs are initiated by CA2 or CA3 pyramidal cells and require initial excitation of CA1 pyramidal cells as well as participation of parvalbumin (PV) expressing fast spiking (FS) inhibitory interneurons...
September 16, 2017: Hippocampus
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