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Remote Memory

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https://www.readbyqxmd.com/read/28427203/regional-structural-impairments-outside-lesions-are-associated-with-verbal-short-term-memory-deficits-in-chronic-subcortical-stroke
#1
Qingqing Diao, Jingchun Liu, Caihong Wang, Jingliang Cheng, Tong Han, Xuejun Zhang
BACKGROUND AND PURPOSE: We aimed to explore the neural mechanisms of verbal short-term memory (VSTM) impairment in subcortical stroke by evaluating the contributions of lesion and remote grey matter volume (GMV) reduction. RESULTS: There was no significant correlation between lesions and VSTM. In stroke patients with left lesions, GMV reductions in the right middle frontal gyrus and in the left inferior frontal gyrus were positively correlated with VSTM impairment...
March 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28422578/korean-version-of-the-mini-mental-state-examination-using-smartphone-a-validation-study
#2
Hae-Yeon Park, Sung-Soo Jeon, Jin-Youn Lee, Ah-Ra Cho, Joo Hyun Park
BACKGROUND: Stroke often leads to disability, and poststroke survivors often have limited accessibility to medical facilities. INTRODUCTION: For such patients, mobile videoconferencing technology offers an opportunity to perform follow-up assessment and appropriate management of cognitive impairment. We aimed to determine the validity of the Korean version of the Mini-Mental State Examination (MMSE-K) when administered using a smartphone. MATERIALS AND METHODS: Thirty patients with ischemic or hemorrhagic stroke were included in this study (20 males, 10 females; mean age, 69...
April 19, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28420200/integrating-spatial-working-memory-and-remote-memory-interactions-between-the-medial-prefrontal-cortex-and-hippocampus
#3
REVIEW
Ryan A Wirt, James M Hyman
In recent years, two separate research streams have focused on information sharing between the medial prefrontal cortex (mPFC) and hippocampus (HC). Research into spatial working memory has shown that successful execution of many types of behaviors requires synchronous activity in the theta range between the mPFC and HC, whereas studies of memory consolidation have shown that shifts in area dependency may be temporally modulated. While the nature of information that is being communicated is still unclear, spatial working memory and remote memory recall is reliant on interactions between these two areas...
April 18, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28415908/the-association-of-personal-semantic-memory-to-identity-representations-insight-into-higher-order-networks-of-autobiographical-contents
#4
Matthew D Grilli
Identity representations are higher-order knowledge structures that organise autobiographical memories on the basis of personality and role-based themes of one's self-concept. In two experiments, the extent to which different types of personal semantic content are reflected in these higher-order networks of memories was investigated. Healthy, young adult participants generated identity representations that varied in remoteness of formation and verbally reflected on these themes in an open-ended narrative task...
April 17, 2017: Memory
https://www.readbyqxmd.com/read/28412502/enriched-environment-effects-on-remote-object-recognition-memory
#5
Riccardo Melani, Gabriele Chelini, Maria Cristina Cenni, Nicoletta Berardi
Since Ebbinghaus' classical work on oblivion and saving effects, we know that declarative memories may become at first spontaneously irretrievable and only subsequently completely extinguished. Recently, this time-dependent path towards memory-trace loss has been shown to correlate with different patterns of brain activation. Environmental enrichment (EE) enhances learning and memory and affects system memory consolidation. However, there is no evidence on whether and how EE could affect the time-dependent path towards oblivion...
April 12, 2017: Neuroscience
https://www.readbyqxmd.com/read/28397244/analyzing-data-remnant-remains-on-user-devices-to-determine-probative-artifacts-in-cloud-environment
#6
Abdulghani Ali Ahmed, Chua Xue Li
Cloud storage service allows users to store their data online, so that they can remotely access, maintain, manage, and back up data from anywhere via the Internet. Although helpful, this storage creates a challenge to digital forensic investigators and practitioners in collecting, identifying, acquiring, and preserving evidential data. This study proposes an investigation scheme for analyzing data remnants and determining probative artifacts in a cloud environment. Using pCloud as a case study, this research collected the data remnants available on end-user device storage following the storing, uploading, and accessing of data in the cloud storage...
April 10, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28392406/environmental-enrichment-enhances-systems-level-consolidation-of-a-spatial-memory-after-lesions-of-the-ventral-midline-thalamus
#7
Mohamad Ali, Thibault Cholvin, Marc Antoine Muller, Brigitte Cosquer, Christian Kelche, Jean-Christophe Cassel, Anne Pereira de Vasconcelos
Lesions of the reuniens and rhomboid (ReRh) thalamic nuclei in rats do not alter spatial learning but shorten the period of memory persistence (Loureiro et al. 2012). Such persistence requires a hippocampo-cortical (prefrontal) dialog leading to memory consolidation at the systems level. Evidence for reciprocal connections with the hippocampus and the medial prefrontal cortex (mPFC) makes the ReRh a potential hub for regulating hippocampo-cortical interactions. As environmental enrichment (EE) fosters recovery of declarative-like memory functions after diencephalic lesions (e...
April 6, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28386011/engrams-and-circuits-crucial-for-systems-consolidation-of-a-memory
#8
Takashi Kitamura, Sachie K Ogawa, Dheeraj S Roy, Teruhiro Okuyama, Mark D Morrissey, Lillian M Smith, Roger L Redondo, Susumu Tonegawa
Episodic memories initially require rapid synaptic plasticity within the hippocampus for their formation and are gradually consolidated in neocortical networks for permanent storage. However, the engrams and circuits that support neocortical memory consolidation have thus far been unknown. We found that neocortical prefrontal memory engram cells, which are critical for remote contextual fear memory, were rapidly generated during initial learning through inputs from both the hippocampal-entorhinal cortex network and the basolateral amygdala...
April 7, 2017: Science
https://www.readbyqxmd.com/read/28335482/improved-wallis-dodging-algorithm-for-large-scale-super-resolution-reconstruction-remote-sensing-images
#9
Chong Fan, Xushuai Chen, Lei Zhong, Min Zhou, Yun Shi, Yulin Duan
A sub-block algorithm is usually applied in the super-resolution (SR) reconstruction of images because of limitations in computer memory. However, the sub-block SR images can hardly achieve a seamless image mosaicking because of the uneven distribution of brightness and contrast among these sub-blocks. An effectively improved weighted Wallis dodging algorithm is proposed, aiming at the characteristic that SR reconstructed images are gray images with the same size and overlapping region. This algorithm can achieve consistency of image brightness and contrast...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28316870/dural-arteriovenous-fistula-manifested-as-rapid-progressive-dementia-successfully-treated-by-endovascular-embolization-only
#10
Heewon Hwang, Yun Kyung La, Min Seok Baek, Kyoungwon Baik, Sang Hyun Suh, Won-Joo Kim
A 43-year-old male presented with daytime sleepiness at work and indifferent behavior like never before. Two weeks prior to hospital admission, he had episodic memory loss with well preserved remote memory. Brain MRI showed a dural arteriovenous fistula (DAVF) in the right lateral transverse sinus with a bilateral thalamic venous infarction. Cerebral angiography confirmed a right transverse sigmoid dural arteriovenous fistula with a feeding artery of the right occipital artery and left posterior meningeal artery...
March 2017: Neurointervention
https://www.readbyqxmd.com/read/28297271/evaluation-of-digital-radiography-practice-using-exposure-index-tracking
#11
Alexander W Scott, Yifang Zhou, Janet Allahverdian, Jessica L Nute, Christina Lee
Some digital radiography (DR) detectors and software allow for remote download of exam statistics, including image reject status, body part, projection, and exposure index (EI). The ability to have automated data collection from multiple DR units is conducive to a quality control (QC) program monitoring institutional radiographic exposures. We have implemented such a QC program with the goal to identify outliers in machine radiation output and opportunities for improvement in radiation dose levels. We studied the QC records of four digital detectors in greater detail on a monthly basis for one year...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28290135/spinal-cord-injury-impairs-neurogenesis-and-induces-glial-reactivity-in-the-hippocampus
#12
Ignacio Jure, Luciana Pietranera, Alejandro F De Nicola, Florencia Labombarda
The incorporation of newborn neurons with increased synaptic remodeling and activity-dependent plasticity in the dentate gyrus enhances hippocampal-dependent learning performances. Astrocytes and microglial cells are components of the neurogenic niche and regulate neurogenesis under normal and neurophatological conditions leading to functional consequences for learning and memory. Although cognitive impairments were reported in patients after spinal cord injury (SCI), only few studies have considered remote changes in brain structures which are not related with sensory and motor cortex...
March 13, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28288787/evolution-of-autobiographical-memory-impairments-in-alzheimer-s-disease-and-frontotemporal-dementia-a-longitudinal-neuroimaging-study
#13
Muireann Irish, Ramon Landin-Romero, Annu Mothakunnel, Siddharth Ramanan, Sharpley Hsieh, John R Hodges, Olivier Piguet
Compromised autobiographical memory (ABM) retrieval is well established in dementia, attributable to degeneration of a core memory brain network. It remains unclear, however, how the progressive spread of atrophy with advancing disease severity impacts ABM retrieval across life epochs. To this end, we conducted a longitudinal study of recent and remote ABM in Alzheimer's disease (AD, n =11), and a frontotemporal lobar degeneration group (FTD, n =13) comprising 7 behavioral variant FTD and 6 semantic dementia patients, in comparison with 23 healthy older Controls...
March 10, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28277519/reading-and-writing-single-atom-magnets
#14
Fabian D Natterer, Kai Yang, William Paul, Philip Willke, Taeyoung Choi, Thomas Greber, Andreas J Heinrich, Christopher P Lutz
The single-atom bit represents the ultimate limit of the classical approach to high-density magnetic storage media. So far, the smallest individually addressable bistable magnetic bits have consisted of 3-12 atoms. Long magnetic relaxation times have been demonstrated for single lanthanide atoms in molecular magnets, for lanthanides diluted in bulk crystals, and recently for ensembles of holmium (Ho) atoms supported on magnesium oxide (MgO). These experiments suggest a path towards data storage at the atomic limit, but the way in which individual magnetic centres are accessed remains unclear...
March 8, 2017: Nature
https://www.readbyqxmd.com/read/28273777/remote-assessment-of-verbal-memory-in-ms-patients-using-the-california-verbal-learning-test
#15
Lisa F Barcellos, Kalliope H Bellesis, Ling Shen, Xiaorong Shao, Terrence Chinn, Seth Frndak, Allison Drake, Nandini Bakshi, Jackie Marcus, Catherine Schaefer, Ralph Hb Benedict
We used the California Verbal Learning Test, Second Edition (CVLT-II), one component of the Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS), to determine feasibility of a remote assessment protocol. We compared telephone-administered CVLT-II data from MS patients to data acquired in person from an independent sample of patients and healthy controls. Mixed factor analyses of variance (ANOVAs) showed no significant differences between patient groups, but between-group effects comparing patients and healthy controls were significant...
February 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28269057/towards-real-time-qrs-feature-extraction-for-wearable-monitors
#16
Lukas Smital, Clifton Haider, Pavel Leinveber, Pavel Jurak, Barry Gilbert, David Holmes
The ability to generate computationally compact ECG analysis algorithms is of interest in the field of wearable physiologic monitors. Such remote monitors necessarily have limited on-board energy storage and therefore lack the computational power and physical memory often required for academic study of physiologic waveforms. Herein we evaluate a set of algorithms with markedly different computation and memory footprints useful in extracting QRS complexes from synthetically generated noisy and measured ECG signals...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28254465/spermidine-improves-the-persistence-of-reconsolidated-fear-memory-and-neural-differentiation-in-vitro-involvement-of-bdnf
#17
Cristiane Signor, Bruna Amanda Girardi, Arithane Lorena Wendel, Pâmella Karina Santana Frühauf, Micheli M Pillat, Henning Ulrich, Carlos F Mello, Maribel A Rubin
Putrescine, spermidine and spermine are organic cations implicated in learning, memory consolidation, reconsolidation and neurogenesis. These physiological processes are closely related, and convincing evidence indicates that neurogenesis is implicated both, in the establishment and maintenance of remote contextual fear memory. Although brain-derived neurotrophic factor (BDNF) is a key mediator involved in both neurogenesis and memory consolidation, effects of spermidine on persistence of memory after reactivation (reconsolidation) and possible involvement of BDNF have not been investigated...
February 22, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28252103/long-term-ground-deformation-patterns-of-bucharest-using-multi-temporal-insar-and-multivariate-dynamic-analyses-a-possible-transpressional-system
#18
Iuliana Armaş, Diana A Mendes, Răzvan-Gabriel Popa, Mihaela Gheorghe, Diana Popovici
The aim of this exploratory research is to capture spatial evolution patterns in the Bucharest metropolitan area using sets of single polarised synthetic aperture radar (SAR) satellite data and multi-temporal radar interferometry. Three sets of SAR data acquired during the years 1992-2010 from ERS-1/-2 and ENVISAT, and 2011-2014 from TerraSAR-X satellites were used in conjunction with the Small Baseline Subset (SBAS) and persistent scatterers (PS) high-resolution multi-temporal interferometry (InSAR) techniques to provide maps of line-of-sight displacements...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28227274/towards-real-time-qrs-feature-extraction-for-wearable-monitors
#19
Lukas Smital, Clifton Haider, Pavel Leinveber, Pavel Jurak, Barry Gilbert, David Holmes, Lukas Smital, Clifton Haider, Pavel Leinveber, Pavel Jurak, Barry Gilbert, David Holmes, Pavel Leinveber, Pavel Jurak, Lukas Smital, Clifton Haider, David Holmes, Barry Gilbert
The ability to generate computationally compact ECG analysis algorithms is of interest in the field of wearable physiologic monitors. Such remote monitors necessarily have limited on-board energy storage and therefore lack the computational power and physical memory often required for academic study of physiologic waveforms. Herein we evaluate a set of algorithms with markedly different computation and memory footprints useful in extracting QRS complexes from synthetically generated noisy and measured ECG signals...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28221714/photonic-devices-out-of-equilibrium-transient-memory-signal-propagation-and-sensing
#20
Thomas Heuser, Rémi Merindol, Sebastian Loescher, Aileen Klaus, Andreas Walther
Soft photonic materials are important for sensors, displays, or energy management and have become switchable under static equilibrium conditions by integration of responsive polymer features. The next step is to equip such materials with the ability for autonomously dynamic and self-regulating behavior, which would advance their functionality and application possibilities to new levels. Here, this study shows the system integration of a nonlinear, biocatalytic pH-feedback system with a pH-responsive block copolymer photonic gel, and demonstrates autonomous transient memories, remotely controlled signal propagation, and sensing...
February 21, 2017: Advanced Materials
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