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Spatial neglect

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https://www.readbyqxmd.com/read/28937807/use-of-virtual-reality-in-improving-poststroke-neglect-promising-neuropsychological-and-neurophysiological-findings-from-a-case-study
#1
Rosaria De Luca, Viviana Lo Buono, Antonino Leo, Margherita Russo, Bianca Aragona, Simona Leonardi, Antonio Buda, Antonino Naro, Rocco Salvatore Calabrò
After experiencing a stroke in the right hemisphere, almost 50% of patients show unilateral spatial neglect (USN). Virtual Reality technologies offer impressive opportunities for both the rehabilitation and assessment of different cognitive deficits, including USN. A 57-year-old woman, affected by subarachnoid hemorrhage presented a severe left hemiparesis with severe cognitive and behavioral alterations, including temporal and spatial disorientation, reduction of attention and memory process, slowing ideation, USN, and depression of mood...
September 22, 2017: Applied Neuropsychology. Adult
https://www.readbyqxmd.com/read/28922960/cognitive-performance-in-transient-global-hypoxic-brain-injury-due-to-moderate-drowning
#2
Mariana Penteado Nucci, Katerina Lukasova, Gilson Vieira, João Ricardo Sato, Edson Amaro Júnior
INTRODUCTION: Drowning is a serious and frequently neglected public health threat. Primary respiratory impairment after submersion often leads to brain dysfunction. Depending on the period of global hypoxia (respiratory failure), clinical aspects of neurological dysfunction are evident on the first evaluation after the water rescue. Nowadays, many neuropsychological assessments after drowning are inconclusive, with some studies reporting only minor neurological or cognitive impairments...
September 19, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28898956/long-short-term-memory-neural-network-for-air-pollutant-concentration-predictions-method-development-and-evaluation
#3
Xiang Li, Ling Peng, Xiaojing Yao, Shaolong Cui, Yuan Hu, Chengzeng You, Tianhe Chi
Air pollutant concentration forecasting is an effective method of protecting public health by providing an early warning against harmful air pollutants. However, existing methods of air pollutant concentration prediction fail to effectively model long-term dependencies, and most neglect spatial correlations. In this paper, a novel long short-term memory neural network extended (LSTME) model that inherently considers spatiotemporal correlations is proposed for air pollutant concentration prediction. Long short-term memory (LSTM) layers were used to automatically extract inherent useful features from historical air pollutant data, and auxiliary data, including meteorological data and time stamp data, were merged into the proposed model to enhance the performance...
September 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28898388/memory-and-executive-functioning-in-12-year-old-children-with-a-history-of-institutional-rearing
#4
Johanna Bick, Charles H Zeanah, Nathan A Fox, Charles A Nelson
We examined visual recognition memory and executive functioning (spatial working memory [SWM], spatial planning, rule learning, and attention shifting) in 12-year-olds (n = 150) who participated in the Bucharest Early Intervention Project, a randomized controlled trial of foster care for institutionally reared children. Similar to prior reports at 8 years of age, institutionally reared children showed significant deficits in visual recognition memory and SWM. Deficits in attention shifting and rule learning were also apparent at this time point...
September 12, 2017: Child Development
https://www.readbyqxmd.com/read/28843415/complexity-vs-unity-in-unilateral-spatial-neglect
#5
REVIEW
G Rode, M Fourtassi, C Pagliari, L Pisella, Y Rossetti
Unilateral spatial neglect constitutes a heterogeneous syndrome characterized by two main entangled components: a contralesional bias of spatial attention orientation; and impaired building and/or exploration of mental representations of space. These two components are present in different subtypes of unilateral spatial neglect (visual, auditory, somatosensory, motor, allocentric, egocentric, personal, representational and productive manifestations). Detailed anatomical and clinical analyses of these conditions and their underlying disorders show the complexity of spatial cognitive deficits and the difficulty of proposing just one explanation...
August 23, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/28842388/exergames-encouraging-exploration-of-hemineglected-space-in-stroke-patients-with-visuospatial-neglect-a-feasibility-study
#6
Bernadette C Tobler-Ammann, Elif Surer, Eling D de Bruin, Marco Rabuffetti, N Alberto Borghese, Renato Mainetti, Michele Pirovano, Lia Wittwer, Ruud H Knols
BACKGROUND: Use of exergames can complement conventional therapy and increase the amount and intensity of visuospatial neglect (VSN) training. A series of 9 exergames-games based on therapeutic principles-aimed at improving exploration of the neglected space for patients with VSN symptoms poststroke was developed and tested for its feasibility. OBJECTIVES: The goal was to determine the feasibility of the exergames with minimal supervision in terms of (1) implementation of the intervention, including adherence, attrition and safety, and (2) limited efficacy testing, aiming to document possible effects on VSN symptoms in a case series of patients early poststroke...
August 25, 2017: JMIR Serious Games
https://www.readbyqxmd.com/read/28840091/the-relationship-between-subjective-perception-and-the-psychological-effects-of-patients-in-spatial-isolation
#7
Fabienne Ibert, Monika Eckstein, Frank Günther, Nico T Mutters
Background: Spatial isolation is a common infection control measure, but negative psychological effects are often neglected. We investigated which factors influence the perception of single room isolated patients. Methods: In the present correlative cross-sectional study, 32 isolated patients have been interviewed within three departments of the Heidelberg University Hospital, one of Germany's largest hospitals. The following questionnaires were used: 10-Item Big Five Inventory (BFI-10), Positive and Negative Affect Schedule (PANAS), Hospital Anxiety and Depression Scale (HADS) and a self-developed questionnaire to evaluate the individual experience of isolation...
2017: GMS Hygiene and Infection Control
https://www.readbyqxmd.com/read/28838305/point-of-care-mobile-digital-microscopy-and-deep-learning-for-the-detection-of-soil-transmitted-helminths-and-schistosoma-haematobium
#8
Oscar Holmström, Nina Linder, Billy Ngasala, Andreas Mårtensson, Ewert Linder, Mikael Lundin, Hannu Moilanen, Antti Suutala, Vinod Diwan, Johan Lundin
BACKGROUND: Microscopy remains the gold standard in the diagnosis of neglected tropical diseases. As resource limited, rural areas often lack laboratory equipment and trained personnel, new diagnostic techniques are needed. Low-cost, point-of-care imaging devices show potential in the diagnosis of these diseases. Novel, digital image analysis algorithms can be utilized to automate sample analysis. OBJECTIVE: Evaluation of the imaging performance of a miniature digital microscopy scanner for the diagnosis of soil-transmitted helminths and Schistosoma haematobium, and training of a deep learning-based image analysis algorithm for automated detection of soil-transmitted helminths in the captured images...
June 2017: Global Health Action
https://www.readbyqxmd.com/read/28832604/soil-iron-and-aluminium-concentrations-and-feet-hygiene-as-possible-predictors-of-podoconiosis-occurrence-in-kenya
#9
Jacinta Muli, John Gachohi, Jim Kagai
BACKGROUND: Podoconiosis (mossy foot) is a neglected non-filarial elephantiasis considered to be caused by predisposition to cumulative contact of uncovered feet to irritative red clay soil of volcanic origins in the tropical regions. Data from structured observational studies on occurrence of Podoconiosis and related factors are not available in Kenya. METHODOLOGY/PRINCIPAL FINDINGS: To establish the occurrence and aspects associated with Podoconiosis, a cross-sectional survey was implemented in an area located within 30 km from the foot of volcanic Mount Longonot in the Great Rift Valley in Kenya...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28831004/hydrodynamic-and-entropic-effects-on-colloidal-diffusion-in-corrugated-channels
#10
Xiang Yang, Chang Liu, Yunyun Li, Fabio Marchesoni, Peter Hänggi, H P Zhang
In the absence of advection, confined diffusion characterizes transport in many natural and artificial devices, such as ionic channels, zeolites, and nanopores. While extensive theoretical and numerical studies on this subject have produced many important predictions, experimental verifications of the predictions are rare. Here, we experimentally measure colloidal diffusion times in microchannels with periodically varying width and contrast results with predictions from the Fick-Jacobs theory and Brownian dynamics simulation...
August 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28816521/plume-activity-and-tidal-deformation-on-enceladus-influenced-by-faults-and-variable-ice-shell-thickness
#11
Marie Běhounková, Ondřej Souček, Jaroslav Hron, Ondřej Čadek
We investigated the effect of variations in ice shell thickness and of the tiger stripe fractures crossing Enceladus' south polar terrain on the moon's tidal deformation by performing finite element calculations in three-dimensional geometry. The combination of thinning in the polar region and the presence of faults has a synergistic effect that leads to an increase of both the displacement and stress in the south polar terrain by an order of magnitude compared to that of the traditional model with a uniform shell thickness and without faults...
September 2017: Astrobiology
https://www.readbyqxmd.com/read/28813816/computational-rehabilitation-of-neglect-using-state-space-models-to-understand-the-recovery-mechanisms
#12
Giulia Sedda, Marcella Ottonello, Elena Fiabane, Caterina Pistarini, Anna Sedda, Vittorio Sanguineti
Unilateral spatial neglect is a neuropsychological syndrome often observed in right hemisphere stroke patients. The symptoms differ from subject to subject. A few rehabilitation approaches, e.g. prism adaptation, have demonstrated some effect in reducing the symptoms, but the underlying mechanisms are still largely unclear. Recently, neural models have been proposed to qualitatively describe cortical lesions, the resulting neglect symptoms and the effects of treatment. However, these predictions are qualitative and cannot be used to compare different hypotheses or to interpret symptoms at individual subjects level...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812421/right-hemispatial-ipsilesional-neglect-with-chronic-right-hemisphere-strokes
#13
John B Williamson, Damon G Lamb, D Brandon Burtis, Salsabil Haque, Eduardo M Zilli, Tigran Kesayan, Michal Harciarek, Kenneth M Heilman
BACKGROUND: Patients who present with spatial neglect after stroke often perform normally on tests for neglect after a few weeks. Whereas tests for neglect are often performed directly in front of a patient, in their actual environments many important stimuli may be present within their left or right hemispace. The presence and severity of neglect often depends on the hemisphere injured. It is possible, in chronic stroke, for spatial judgments to be influenced by an interaction of stroke laterality and the spatial location of stimuli...
August 16, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28811605/spatial-and-viewpoint-selectivity-for-others-observed-actions-in-monkey-ventral-premotor-mirror-neurons
#14
Monica Maranesi, Alessandro Livi, Luca Bonini
The spatial location and viewpoint of observed actions are closely linked in natural social settings. For example, actions observed from a subjective viewpoint necessarily occur within the observer's peripersonal space. Neurophysiological studies have shown that mirror neurons (MNs) of the monkey ventral premotor area F5 can code the spatial location of live observed actions. Furthermore, F5 MN discharge can also be modulated by the viewpoint from which filmed actions are seen. Nonetheless, whether and to what extent MNs can integrate viewpoint and spatial location of live observed actions remains unknown...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783195/murine-cutaneous-leishmaniasis-investigated-by-maldi-mass-spectrometry-imaging
#15
Fernanda Negrão, Daniele F de O Rocha, Caroline F Jaeeger, Francisca J S Rocha, Marcos N Eberlin, Selma Giorgio
Imaging mass spectrometry (IMS) is recognized as a powerful tool to investigate the spatial distribution of untargeted or targeted molecules of a wide variety of samples including tissue sections. Leishmania is a protozoan parasite that causes different clinical manifestations in mammalian hosts. Leishmaniasis is a major public health risk in different continents and represents one of the most important neglected diseases. Cutaneous lesions from mice experimentally infected with Leishmania spp. were investigated by matrix-assisted laser desorption ionization MS using the SCiLS Lab software for statistical analysis...
August 7, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28774229/what-role-for-prism-adaptation-in-the-rehabilitation-of-pure-neglect-dyslexia
#16
Radek Ptak
Prism adaptation (PA) has been successfully applied in the rehabilitation of spatial neglect, with significant transfer to classic neglect tests and activities of daily living. However, well-controlled studies were unable to replicate these findings, and recent reports suggest that PA may affect selectively visuo-motor symptoms. Here, a patient with pure left neglect dyslexia was tested before, immediately after, and 24 h after PA. Despite a significant adaptation aftereffect adaptation had no effect omissions, substitutions and letter-based errors...
August 4, 2017: Neurocase
https://www.readbyqxmd.com/read/28755239/prism-adaptation-speeds-reach-initiation-in-the-direction-of-the-prism-after-effect
#17
Christopher L Striemer, Carley A Borza
Damage to the temporal-parietal cortex in the right hemisphere often leads to spatial neglect-a disorder in which patients are unable to attend to sensory input from their contralesional (left) side. Neglect has been associated with both attentional and premotor deficits. That is, in addition to having difficulty with attending to the left side, patients are often slower to initiate leftward vs. rightward movements (i.e., directional hypokinesia). Previous research has indicated that a brief period of adaptation to rightward shifting prisms can reduce symptoms of neglect by adjusting the patient's movements leftward, toward the neglected field...
July 28, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28755002/prediction-of-soil-cadmium-distribution-across-a-typical-area-of-chengdu-plain-china
#18
Qiquan Li, Changquan Wang, Tianfei Dai, Wenjiao Shi, Xin Zhang, Yi Xiao, Weiping Song, Bing Li, Yongdong Wang
A suitable method and appropriate environmental variables are important for accurately predicting heavy metal distribution in soils. However, the classical methods (e.g., ordinary kriging (OK)) have a smoothing effect that results in a tendency to neglect local variability, and the commonly used environmental variables (e.g., terrain factors) are ineffective for improving predictions across plains. Here, variables were derived from the obvious factors affecting soil cadmium (Cd), such as road traffic, and were used as auxiliary variables for a combined method (HASM_RBFNN) that was developed using high accuracy surface modelling (HASM) and radial basis function neural network (RBFNN) model...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747903/stoichiometric-mismatch-between-consumers-and-resources-mediates-the-growth-of-rocky-intertidal-suspension-feeders
#19
Matthew E S Bracken
The concept of ecological stoichiometry-the balancing of elemental ratios in ecological interactions-has transformed our thinking about processes in natural systems. Here, this perspective is applied to rocky shore ecosystems to explore the consequences of variation in internal nutrient ratios across two trophic levels. Specifically, I measured the internal concentrations of carbon (C) and nitrogen (N) in mussels (Mytilus spp.) and particulate organic matter (POM) to evaluate the effects of stoichiometric mismatch-the difference in the carbon-to-nitrogen ratio (C:N) between a consumer and its resources-on mussel growth at sites on the coasts of Oregon, USA, and the South Island of New Zealand...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28744194/navigating-monogamy-nonapeptide-sensitivity-in-a-memory-neural-circuit-may-shape-social-behavior-and-mating-decisions
#20
REVIEW
Alexander G Ophir
The role of memory in mating systems is often neglected despite the fact that most mating systems are defined in part by how animals use space. Monogamy, for example, is usually characterized by affiliative (e.g., pairbonding) and defensive (e.g., mate guarding) behaviors, but a high degree of spatial overlap in home range use is the easiest defining feature of monogamous animals in the wild. The nonapeptides vasopressin and oxytocin have been the focus of much attention for their importance in modulating social behavior, however this work has largely overshadowed their roles in learning and memory...
2017: Frontiers in Neuroscience
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