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https://www.readbyqxmd.com/read/28513478/a-gaze-independent-hybrid-bci-based-on-visual-spatial-attention
#1
John M Egan, Gerard M Loughnane, Helen Fletcher, Emma Meade, Edmund C Lalor
OBJECTIVE: Brain-computer interfaces (BCI) use measures of brain activity to convey a user's intent without the need for muscle movement. Hybrid designs, which use multiple measures of brain activity, have been shown to increase the accuracy of BCIs, including those based on EEG signals reflecting covert attention. Our study examined whether incorporating a measure of the P3 response improved the performance of a previously reported attention-based BCI design that incorporates measures of steady-state visual evoked potentials (SSVEP) and alpha band modulations...
May 17, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28512502/health-inequalities-associated-with-post-stroke-visual-impairment-in-the-united-kingdom-and-ireland-a-systematic-review
#2
REVIEW
K L Hanna, F J Rowe
The aim of this study was to report on the health inequalities facing stroke survivors with visual impairments as described in the current literature. A systemic review of the literature was conducted to investigate the potential health inequalities facing stroke survivors with subsequent visual impairments. A quality-of-evidence and risk-of-bias assessment was conducted for each of the included articles using the appropriate tool dependent on the type of article. Only four articles discussed health inequalities affecting stroke survivors with visual impairment specifically...
June 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28511066/deep-image-mining-for-diabetic-retinopathy-screening
#3
Gwenolé Quellec, Katia Charrière, Yassine Boudi, Béatrice Cochener, Mathieu Lamard
Deep learning is quickly becoming the leading methodology for medical image analysis. Given a large medical archive, where each image is associated with a diagnosis, efficient pathology detectors or classifiers can be trained with virtually no expert knowledge about the target pathologies. However, deep learning algorithms, including the popular ConvNets, are black boxes: little is known about the local patterns analyzed by ConvNets to make a decision at the image level. A solution is proposed in this paper to create heatmaps showing which pixels in images play a role in the image-level predictions...
April 28, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28509372/differential-expression-of-micrornas-related-to-irritable-bowel-syndrome-in-a-rabbit-model
#4
Qinqin Yang, Xiaoping Xu, Hongshu Zhao, Yueqin Cai, Yongming Pan, Jianqin Xu, Quanxin Ma, Minli Chen
AIM: In the study we evaluated differential expression of miRNAs in the white hair and black eyes(WHBE) rabbit model of irritable bowel syndrome(IBS). METHODS: WHBE IBS rabbits were exposed to moist heat, stress, and stimulation with a low-dose laxative. Intestional propulsion rate(IPR) was measured. Blood samples were taken to detect changes in serum 5-hydroxytryptamine(5-HT) and dopamine(DA) levels, and colon tissues were to detect c-fos by immunohistochemistry...
May 16, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28505584/development-of-a-gold-nanoparticle-based-universal-oligonucleotide-microarray-for-multiplex-and-low-cost-detection-of-foodborne-pathogens
#5
Xiaoqiang Wang, Sisi Ying, Xiaoguang Wei, Jun Yuan
Bacterial foodborne diseases remain major threats to food safety and public health, especially in developing countries. In this study a novel assay, combining gold nanoparticle (GNP)-based multiplex oligonucleotide ligation-PCR and universal oligonucleotide microarray technology, was developed for inexpensive, specific, sensitive, and multiplex detection of eight common foodborne pathogens, including Shigella spp., Campylobacter jejuni, Bacillus cereus, Escherichia coli O157:H7, Listeria monocytogenes, Salmonella enterica, Staphylococcus aureus, and Vibrio parahaemolyticus...
May 9, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28500464/global-skin-colour-prediction-from-dna
#6
Susan Walsh, Lakshmi Chaitanya, Krystal Breslin, Charanya Muralidharan, Agnieszka Bronikowska, Ewelina Pospiech, Julia Koller, Leda Kovatsi, Andreas Wollstein, Wojciech Branicki, Fan Liu, Manfred Kayser
Human skin colour is highly heritable and externally visible with relevance in medical, forensic, and anthropological genetics. Although eye and hair colour can already be predicted with high accuracies from small sets of carefully selected DNA markers, knowledge about the genetic predictability of skin colour is limited. Here, we investigate the skin colour predictive value of 77 single-nucleotide polymorphisms (SNPs) from 37 genetic loci previously associated with human pigmentation using 2025 individuals from 31 global populations...
May 12, 2017: Human Genetics
https://www.readbyqxmd.com/read/28499705/measurement-and-reproducibility-of-preserved-ellipsoid-zone-area-and-preserved-rpe-area-in-a-cohort-of-eyes-with-choroideremia
#7
Amir H Hariri, Swetha B Velaga, Aniz Girach, Michael S Ip, Phuc V Le, Byron L Lam, M Dominik Fischer, Eeva-Marja Sankila, Mark Pennesi, Frank G Holz, Robert E MacLaren, David G Birch, Carel B Hoyng, Ian M MacDonald, Graeme C Black, Stephen H Tsang, Neil M Bressler, Michael Larsen, Michael B Gorin, Andrew R Webster, SriniVas R Sadda
PURPOSE: To identify valid and reproducible methods for quantifying anatomical outcome measures for eyes with choroideremia (CHM) in clinical trials. DESIGN: Reliability analysis study. METHODS: In this multicenter study, patients with confirmed genetic diagnosis of CHM were enrolled. All cases underwent spectral domain optical coherence tomography (SD-OCT) and fundus autofluorescence (FAF) imaging. Two graders independently delineated boundaries of preserved autofluorescence (PAF) and preserved ellipsoid zone (EZ) on FAF and OCT images respectively...
May 9, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28493106/human-classifier-observers-can-deduce-task-solely-from-eye-movements
#8
Brett Bahle, Mark Mills, Michael D Dodd
Computer classifiers have been successful at classifying various tasks using eye movement statistics. However, the question of human classification of task from eye movements has rarely been studied. Across two experiments, we examined whether humans could classify task based solely on the eye movements of other individuals. In Experiment 1, human classifiers were shown one of three sets of eye movements: Fixations, which were displayed as blue circles, with larger circles meaning longer fixation durations; Scanpaths, which were displayed as yellow arrows; and Videos, in which a neon green dot moved around the screen...
May 10, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28482929/ivermectin-induced-steven-johnsons-syndrome-case-report
#9
Desmond Aroke, Diego Nitcheu Tchouakam, Alexis Tazinya Awungia, Sylvester Yari Mapoh, Stewart Ndutard Ngassa, Benjamin Momo Kadia
BACKGROUND: Stevens-Johnson syndrome is one of the manifestations of mucocutaneous adverse drug reactions. Although antimicrobials are responsible for greater than 50% of these adverse drug reactions, there is no documented case implicating ivermectin as the culprit. A 38 year old adult Cameroonian male presented to our health facility with facial rash, painful oral sores, black eschars on lips and red tearing eyes 3 days following ingestion of ivermectin received during a nationwide anti-filarial campaign...
May 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28479914/retinal-nerve-fibre-layer-thickness-values-and-their-associations-with-ocular-and-systemic-parameters-in-black-south-africans
#10
Khathutshelo P Mashige, Olalekan A Oduntan
PURPOSE: To measure the retinal nerve fibre layer (RNFL) thickness values and investigate their associations with other parameters in healthy eyes of Black South Africans. METHODS: 600 participants with healthy eyes, of whom 305 (50.83%) were males and 295 (49.17%) were females, with a mean age of 28.15 ± 13.09 years, underwent a detailed ophthalmic examination. RNFL thickness was measured by iVue SD-OCT. RESULTS: The mean global RNFL thickness was 110...
December 2016: African Health Sciences
https://www.readbyqxmd.com/read/28478966/a-rare-case-of-multiple-brain-abscess-and-probably-disseminated-phaeohyphomycosis-due-to-cladophialophora-bantiana-in-an-immunosuppressed-individual-from-india
#11
S Lahiri Mukhopadhyay, A Mahadevan, V H Bahubali, R Dawn Bharath, A R Prabhuraj, S Maji, N Siddaiah
Cladophialophora bantiana, a dematiaceous neurotropic mold causes rare and lethal brain abscess, commonly in immunocompetent hosts. We report a rare and probably a case of disseminated infection with this black mold in an immunosuppressed individual from India. A 55-year-old diabetic male presented with severe headache, blurred-vision, behavioural abnormalities, eye-pain and ear-discharge. He was undergoing treatment for hypertension, prostatomegaly and obstructive pulmonary disease. He was on steroids for the past six years for uveitis...
May 3, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28457091/corneal-staining-and-hot-black-tea-compresses
#12
Asaf Achiron, Yael Birger, Lily Karmona, Haggay Avizemer, Elisha Bartov, Zvia Burgansky-Eliash, Yocheved Rahamim
BACKGROUND: Warm compresses are widely touted as an effective treatment for ocular surface disorders. Black tea compresses are a common household remedy, although there is no evidence in the medical literature proving their effect and their use may lead to harmful side effects. OBJECTIVES: To describe a case in which the application of black tea to an eye with a corneal epithelial defect led to anterior stromal discoloration; evaluate the prevalence of hot tea compress use; and analyze, in vitro, the discoloring effect of tea compresses on a model of a porcine eye...
March 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28448641/detecting-glaucoma-with-a-portable-brain-computer-interface-for-objective-assessment-of-visual-function-loss
#13
Masaki Nakanishi, Yu-Te Wang, Tzyy-Ping Jung, John K Zao, Yu-Yi Chien, Alberto Diniz-Filho, Fabio B Daga, Yuan-Pin Lin, Yijun Wang, Felipe A Medeiros
Importance: The current assessment of visual field loss in diseases such as glaucoma is affected by the subjectivity of patient responses and the lack of portability of standard perimeters. Objective: To describe the development and initial validation of a portable brain-computer interface (BCI) for objectively assessing visual function loss. Design, Setting, and Participants: This case-control study involved 62 eyes of 33 patients with glaucoma and 30 eyes of 17 healthy participants...
April 27, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28443810/-transient-monocular-vision-loss
#14
E J Volkers, R C J M Donders, A Algra, L J Kapelle
Transient monocular vision loss (TMVL) caused by temporary disturbance of blood flow to the retina is a harbinger of future vascular complications. The diagnosis may be difficult, not only because it is solely dependent on history taking, but also because the range of monocular visual symptoms a patient may experience is wide. The classic pattern of a sudden black or grey visual field, or a curtain that is drooping in front of one eye, easily fits in the diagnosis of TMVL; however, coloured vision or flashes should not always be considered as benign...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28428893/characteristics-and-racial-variations-of-polypoidal-choroidal-vasculopathy-in-tertiary-centers-in-the-united-states-and-united-kingdom
#15
Tarek Alasil, Nelida Munoz, Pearse A Keane, Adnan Tufail, Patrick A Coady, Eduardo Novais, Talisa E de Carlo, Caroline R Baumal, Nadia K Waheed, Jay S Duker, Ron A Adelman
PURPOSE: To evaluate the characteristics and racial variations amongst patients with polypoidal choroidal vasculopathy (PCV) in the United States and the United Kingdom. METHODS: Fundus photos and indocyanine green angiography images were evaluated in a multicenter retrospective study to establish the diagnosis of PCV. Visual acuity (VA) was recorded in ETDRS letter count. RESULTS: Eighty eyes of 71 PCV patients (average age of 69.4 ± 10...
2017: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/28413391/minocycline-induced-hyperpigmentation-in-a-patient-treated-with-erlotinib-for-non-small-cell-lung-adenocarcinoma
#16
Ann T Bell, John W Roman, Max L Gratrix, Christina E Brzezniak
INTRODUCTION: While epidermal growth factor receptor (EGFR) inhibitors have improved progression-free survival in patients with non-small cell lung cancer (NSCLC), one of the most common adverse effects is papulopustular skin eruption, which is frequently severe enough to be treated with oral minocycline or doxycycline. CASE: We present a case of an 87-year-old man who developed a severe papulopustular skin eruption secondary to erlotinib therapy for NSCLC. Control of the eruption with 100 mg of minocycline twice daily for 8 months eventually led to blue-gray skin hyperpigmentation...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28402486/the-iterative-nature-of-person-construal-evidence-from-event-related-potentials
#17
Hannah I Volpert-Esmond, Edgar C Merkle, Bruce D Bartholow
Recently, a dynamic-interactive model of person construal (DI model) has been proposed, whereby the social categories a person represents are determined on the basis of an iterative integration of bottom-up and top-down influences. The current study sought to test this model by leveraging the high temporal resolution of event-related brain potentials (ERPs) as 65 participants viewed male faces that varied by race (White vs. Black), fixating either between the eyes or on the forehead. Within face presentations, the effect of fixation, meant to vary bottom-up visual input, initially was large but decreased across early-latency neural responses identified by a principal components analysis (PCA)...
April 11, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28402009/genetic-relationships-between-temperament-of-calves-at-auction-and-carcass-traits-in-japanese-black-cattle
#18
Kazuya Takeda, Hiroshi Uchida, Keiichi Inoue
Correlations of calves' temperament with carcass traits were estimated to clarify the genetic relationships between them in Japanese Black cattle. The temperament records for 3128 calves during auction at a calf market were scored on a scale of 1 (calm) to 5 (nervous) as temperament score (TS), and the TS were divided into two groups (TSG): TS 1 and 2 comprised TSG 1, and 3 to 5 constituted TSG 2. Carcass data were obtained from 33 552 fattened cattle. A threshold animal model was used for analyzing the underlying liability for TSG, whereas a linear one was used for TS and carcass traits...
April 12, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28399037/ocular-argyrosis-mimicking-conjunctival-melanoma
#19
Irwin Tendler, Melissa P Pulitzer, Victor Roggli, David H Abramson, Brian P Marr
PURPOSE: To present a novel case of ocular argyrosis mimicking conjunctival melanoma. METHODS: A 48-year-old man who is a jewelry manufacturer presented with raised pigmented lesions in the inferior fornices of both eyes. Brown-black colored, follicle-like, masses were observed in both fornices. RESULTS: An incisional biopsy confirmed the presence of silver and the diagnosis of ocular argyrosis. CONCLUSIONS: Despite its limited negative health effects, ocular argyrosis should be considered in the differential diagnosis of conjunctival pigmented lesions because of the potential for misidentification of neoplastic growth...
June 2017: Cornea
https://www.readbyqxmd.com/read/28393120/raman-identification-of-cuneiform-tablet-pigments-emphasis-and-colour-technology-in-ancient-mesopotamian-mid-third-millennium
#20
Daniele Chiriu, Pier Carlo Ricci, Carlo Maria Carbonaro, Davide Nadali, Andrea Polcaro, Paul Collins
Cuneiform tablets tell the life and culture of Sumerian people in a sort of black and white tale because of the binary engraving technique. A leading question arises: did Mesopotamian people apply some kind of colour to decorate their tablets or to put emphasis on selected words? Some administrative and literary Sumerian cuneiform tablets of mid-third Millennium B.C. from the site of Kish (central Mesopotamia, modern Iraq) were dug up in twentieth-century and stored at the Ashmolean Museum of the Oxford University...
March 2017: Heliyon
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