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https://www.readbyqxmd.com/read/29240774/pharmacological-inactivation-does-not-support-a-unique-causal-role-for-intraparietal-sulcus-in-the-discrimination-of-visual-number
#1
Nicholas K DeWind, Jiyun Peng, Andrew Luo, Elizabeth M Brannon, Michael L Platt
The "number sense" describes the intuitive ability to quantify without counting. Single neuron recordings in non-human primates and functional imaging in humans suggest the intraparietal sulcus is an important neuroanatomical locus of numerical estimation. Other lines of inquiry implicate the IPS in numerous other functions, including attention and decision making. Here we provide a direct test of whether IPS has functional specificity for numerosity judgments. We used muscimol to reversibly and independently inactivate the ventral and lateral intraparietal areas in two monkeys performing a numerical discrimination task and a color discrimination task, roughly equilibrated for difficulty...
2017: PloS One
https://www.readbyqxmd.com/read/29240562/occurrence-of-impaired-physical-performance-in-memory-clinic-patients-with-cerebral-small-vessel-disease
#2
Jurre H Verwer, Geert-Jan Biessels, Rutger Heinen, Lieza G Exalto, Marielle H Emmelot-Vonk, Huiberdina L Koek
Cerebral small vessel disease (CSVD) occurs often in memory clinic patients. Apart from cognitive deficits, these patients can express physical decline, which predicts adverse health outcomes. In this study, we investigated the cooccurrence of clinically relevant impairments in physical performance and CSVD in memory clinic patients. We included 131 patients with vascular brain injury, mild cognitive impairment or Alzheimer disease with available 3T MRI and physical performance scores. CSVD was visually rated according to 3 subtypes and as a total burden score, composed of the presence of white matter hyperintensities (WMH), lacunar infarcts (LI), and cerebral microbleeds (MB)...
December 13, 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29238759/neuropsychological-evidence-for-the-temporal-dynamics-of-category-specific-naming
#3
Sven Panis, Katrien Torfs, Celine R Gillebert, Johan Wagemans, Glyn W Humphreys
Multiple accounts have been proposed to explain category-specific recognition impairments. Some suggest that category-specific deficits may be caused by a deficit in recurrent processing between the levels of a hierarchically organized visual object recognition system. Here, we tested predictions of interactive processing theories on the emergence of category-selective naming deficits in neurologically intact observers and in patient GA, a single case showing a category-specific impairment for natural objects after a herpes simplex encephalitis infection...
2017: Visual Cognition
https://www.readbyqxmd.com/read/29238310/parameter-based-evaluation-of-attentional-impairments-in-schizophrenia-and-their-modulation-by-prefrontal-transcranial-direct-current-stimulation
#4
Nadine Gögler, Irina Papazova, Tatiana Oviedo-Salcedo, Nina Filipova, Wolfgang Strube, Johanna Funk, Hermann J Müller, Kathrin Finke, Alkomiet Hasan
Background: Attentional dysfunctions constitute core cognitive symptoms in schizophrenia, but the precise underlying neurocognitive mechanisms remain to be elucidated. Methods: In this randomized, double-blind, sham-controlled study, we applied, for the first time, a theoretically grounded modeling approach based on Bundesen's Theory of Visual Attention (TVA) to (i) identify specific visual attentional parameters affected in schizophrenia and (ii) assess, as a proof of concept, the potential of single-dose anodal transcranial direct current stimulation (tDCS; 20 min, 2 mA) to the left dorsolateral prefrontal cortex to modulate these attentional parameters...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29238161/prevalence-and-causes-of-blindness-visual-impairment-and-cataract-surgery-in-timor-leste
#5
Marcelino Correia, Taraprasad Das, Julia Magno, Bernadette M Pereira, Valerio Andrade, Hans Limburg, John Trevelyan, Jill Keeffe, Nitin Verma, Yuddha Sapkota
Purpose: To estimate the prevalence and causes of blindness and visual impairment, cataract surgical coverage (CSC), visual outcome of cataract surgery, and barriers to uptake cataract surgery in Timor-Leste. Method: In a nationwide rapid assessment of avoidable blindness (RAAB), the latest population (1,066,409) and household data were used to create a sampling frame which consists of 2,227 population units (study clusters) from all 13 districts, with populations of 450-900 per unit...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29237554/feature-based-attention-potentiates-recovery-of-fine-direction-discrimination-in-cortically-blind-patients
#6
Matthew R Cavanaugh, Antoine Barbot, Marisa Carrasco, Krystel R Huxlin
Training chronic, cortically-blind (CB) patients on a coarse [left-right] direction discrimination and integration (CDDI) task recovers performance on this task at trained, blind field locations. However, fine direction difference (FDD) thresholds remain elevated at these locations, limiting the usefulness of recovered vision in daily life. Here, we asked if this FDD impairment can be overcome by training CB subjects with endogenous, feature-based attention (FBA) cues. Ten CB subjects were recruited and trained on CDDI and FDD with an FBA cue or FDD with a neutral cue...
December 10, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29237503/integration-of-eye-health-into-primary-care-services-in-tanzania-a-qualitative-investigation-of-experiences-in-two-districts
#7
Emma Jolley, Milka Mafwiri, Joanna Hunter, Elena Schmidt
BACKGROUND: Visual impairment is a public health problem in sub-Saharan Africa, affecting nearly 5% of the population. Efforts to combat avoidable causes have been hampered by weak health systems and little evidence exists to suggest what interventions may be effective to improve the situation. Despite this, there are calls to promote some specific interventions, one of which being the closer integration of eye health services into health systems, often focusing on training primary health workers to deliver basic eye health services...
December 13, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/29237477/the-impact-of-glaucoma-on-quality-of-life-in-ethiopia-a-case-control-study
#8
Fisseha A Ayele, Banchamelak Zeraye, Yared Assefa, Kbrom Legesse, Telake Azale, Matthew J Burton
BACKGROUND: Glaucoma is a chronic disease characterized by irreversible optic nerve damage and visual field loss that leads to visual impairment and blindness; ultimately limiting personal independence and compromising overall quality of life of affected individuals. There is paucity of information on how glaucoma affects the quality of life of patients in low and middle-income countries where resources for both diagnosis and treatment of such conditions are limited. In this study we investigate the impact of glaucoma on quality of life in Ethiopian patients...
December 13, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29237403/isolated-and-repeated-stroke-like-episodes-in-a-middle-aged-man-with-a-mitochondrial-nd3-t10158c-mutation-a-case-report
#9
Satomi Mezuki, Kenji Fukuda, Tomonaga Matsushita, Yoshihisa Fukushima, Ryu Matsuo, Yu-Ichi Goto, Takehiro Yasukawa, Takeshi Uchiumi, Dongchon Kang, Takanari Kitazono, Tetsuro Ago
BACKGROUND: Mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) syndrome, is the most common phenotype of mitochondrial disease. It often develops in childhood or adolescence, usually before the age of 40, in a maternally-inherited manner. Mutations in mitochondrial DNA (mtDNA) are frequently responsible for MELAS. CASE PRESENTATION: A 55-year-old man, who had no family or past history of mitochondrial disorders, suddenly developed bilateral visual field constriction and repeated stroke-like episodes...
December 13, 2017: BMC Neurology
https://www.readbyqxmd.com/read/29237242/enhanced-cognition-and-dysregulated-hippocampal-synaptic-physiology-in-mice-with-a-heterozygous-deletion-of-psd-95
#10
Alexa E Horner, Catherine L McLaughlin, Nurudeen O Afinowi, Timothy J Bussey, Lisa M Saksida, Noboru H Komiyama, Seth G N Grant, Maksym V Kopanitsa
PSD-95 is one of the most abundant proteins of the postsynaptic density of excitatory synapses. It functions as the backbone of protein supercomplexes that mediate signalling between membrane glutamate receptors and intracellular pathways. Homozygous deletion of the Dlg4 gene encoding PSD-95 was previously found to cause a profound impairment in operant and Pavlovian conditioning in Dlg4-/- mice studied in touchscreen chambers that precluded evaluation of PSD-95's role in shaping more subtle forms of learning and memory...
December 13, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29236824/transtemporal-amygdalohippocampectomy-a-novel-minimally-invasive-technique-with-optimal-clinical-results-and-low-cost
#11
Juan Antonio Castro Flores, Felipe Hada Sanders, Eberval Gadelha Figueiredo, Manoel Jacobsen Teixeira
Mesial temporal sclerosis creates a focal epileptic syndrome that usually requires surgical resection of mesial temporal structures. OBJECTIVE: To describe a novel operative technique for treatment of temporal lobe epilepsy and its clinical results. METHODS: Prospective case-series at a single institution, performed by a single surgeon, from 2006 to 2012. A total of 120 patients were submitted to minimally-invasive keyhole transtemporal amygdalohippocampectomy. RESULTS: Of the patients, 55% were male, and 85% had a right-sided disease...
November 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/29234543/a-new-tool-for-self-evaluation-of-adherence-to-antimuscarinic-drugs-treatment-in-patients-with-urinary-incontinence
#12
Kirill V Kosilov, Sergay A Loparev, Irina G Kuzina, Olga V Shakirova, Yuliya I Gainullina, Liliya V Kosilova, Alexandra S Prokofyeva
Abstract objective: To evaluate the validity of the Medication Adherence Self-Report Inventory (MASRI) questionnaire in determining antimuscarinic drugs adherence in patients with urinary incontinence (UI). Patients and methods: In all, 629 patients [355 (56.4%) women and 274 (43.6%) men], aged 18-65 years, were included. All patients were prescribed antimuscarinic drugs and treatment adherence was tested at the start, and after 4, 8 and 12 weeks using the MASRI...
December 2017: Arab Journal of Urology
https://www.readbyqxmd.com/read/29234527/sphingosine-1-phosphate-receptor-1-modulates-cntf-induced-axonal-growth-and-neuroprotection-in-the-mouse-visual-system
#13
Sandrine Joly, Deniz Dalkara, Vincent Pernet
The lack of axonal regeneration and neuronal cell death causes permanent neurological deficits in the injured CNS. Using the classical CNS injury model of optic nerve crush in mice, ciliary neurotrophic factor (CNTF) was found to stimulate retinal ganglion cell (RGC) survival and axonal growth, but in an incomplete fashion. The elucidation of molecular mechanisms impairing CNTF-induced axonal regeneration is paramount to promote visual recovery. In the present study, we sought to evaluate the contribution of sphingosine 1-phosphate receptor 1 (S1PR1) to the neuroprotective and regenerative effects of CNTF...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/29234305/functional-components-of-cognitive-impairment-in-multiple-sclerosis-a-cross-sectional-investigation
#14
Jordi A Matias-Guiu, Ana Cortés-Martínez, María Valles-Salgado, Celia Oreja-Guevara, Vanesa Pytel, Paloma Montero, Teresa Moreno-Ramos, Jorge Matias-Guiu
Background: Cognitive impairment is frequent and disabling in multiple sclerosis (MS). Changes in information processing speed constitute the most important cognitive deficit in MS. However, given the clinical and topographical variability of the disease, cognitive impairment may vary greatly and appear in other forms in addition to slower information processing speed. Our aim was to determine the frequency of cognitive impairment, the principal cognitive domains, and components involved in MS and to identify factors associated with presence of cognitive impairment in these patients in a large series of patients...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29233210/optical-coherence-tomography-indices-of-structural-retinal-pathology-in-schizophrenia
#15
Steven M Silverstein, Danielle Paterno, Lindsay Cherneski, Stuart Green
BACKGROUND: Prior optical coherence tomography (OCT) studies of schizophrenia have identified thinning of retinal layers. However, findings have varied across reports, and most studies have had serious methodological limitations. To address unresolved issues, we determined whether: (1) retinal thinning in schizophrenia occurs independently of comorbid medical conditions that affect the retina; (2) thinning is independent of antipsychotic medication dose; (3) optic nerve parameters are abnormal in schizophrenia; and (4) OCT indices are related to visual and cognitive impairments common in schizophrenia...
December 13, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29233012/living-independently-exploring-the-experiences-of-visually-impaired-people-living-in-age-related-and-lifetime-housing-through-qualitative-synthesis
#16
Clíona Rooney, Karim Hadjri, Verity Faith, Máirin Rooney, Keith McAllister, Cathy Craig
OBJECTIVES: The aim of this study is to gain a deeper understanding of the experiences of visually impaired older people living independently at home. BACKGROUND: As populations are aging globally, there is now an increase in the prevalence of visual impairment. That means for ongoing and future aging-in-place strategies that seek to enable older people to remain independent for longer, more attention needs to be given to the needs of those with visual impairment...
January 1, 2017: HERD
https://www.readbyqxmd.com/read/29232345/factors-associated-with-lack-of-vision-improvement-in-children-with-cortical-visual-impairment
#17
Swati Handa, Seyed E Saffari, Mark Borchert
BACKGROUND: Improvement in vision has been noted in children with cortical visual impairment (CVI), resulting from disparate types of brain injury. The purpose of our study was to determine the risk factors associated with poor recovery of vision in this group of patients. METHODS: Case records of children who were born before 2010 with at least 4 follow-up visits for CVI were reviewed for underlying etiologies of CVI, visual acuity (VA), and associated neurological and ophthalmological disorders...
December 8, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29232042/evaluation-of-visual-motion-perception-ability-in-mice-with-knockout-of-the-dyslexia-candidate-susceptibility-gene-dcdc2
#18
Amanda R Rendall, Peter A Perrino, Joseph J LoTurco, R Holly Fitch
Developmental dyslexia is a heritable disability characterized by difficulties in learning to read and write that cannot be explained by comorbid factors such as intellectual impairment, lack of educational opportunity, or other neurological disorders (e.g. epilepsy or primary sensory impairments (blindness, deafness)). Dyslexia is considered a common neurodevelopmental disorder, affecting 5%-12% of the population (Lyon, Shaywitz & Shaywitz, 2003; Peterson & Pennington, 2012). It is also a highly heterogeneous disorder, with varied intermediate phenotypes, that include visual and cross-modal integration deficits...
December 12, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29230265/-juvenile-myasthenia-gravis-in-sub-saharan-africa-a-case-study-of-two-consanguine-sisters-born-from-consanguinity-in-togo
#19
Nidain Maneh, Kossivi Apetse, Bénédicte Marèbe Diatewa, Sidik Abou-Bakr Domingo, Aidé Isabelle Agba, Koffi Didier Ayena, Koffi Agnon Balogou, Komi Patrice Balo
Myasthenia gravis is a rare acquired autoimmune pathology causing neuromuscular transmission impairment. Juvenile onset of myasthenia gravis is often characterized by ocular involvement. We report two cases of ocular juvenile myasthenia gravis (JMG) in two siblings. They were two young girls, XA and XB, aged 11 and 9 years, of Malian origin, residing in Togo, born from first-degree of consanguinity presenting to Ophthalmology due to progressive decrease in visual acuity. XA showed visual acuity 8/10 on both eyes while XB showed improvement in visual acuity from 3/10 to 7/10 using a pinhole occluder, suggesting ametropia...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29229340/an-unusual-case-of-ureteral-perforation-in-minimally-invasive-pedicle-screw-instrumentation-and-review-of-the-literature
#20
Edward Fomekong, Julien Pierrard, Etienne Danse, Bertrand Tombal, Christian Raftopoulos
BACKGROUND: and Importance: Injury of the ureter is a potentially devastating complication most often reported in gynecologic, colorectal, vascular pelvic surgery or endoscopic procedures for ureteric pathologies. We report a rare case of ureteral rupture occurring as a complication of percutaneous pedicle screw placement. CLINICAL PRESENTATION: A 60-year old man complained of unbearable abdominal pain on the day after right L4-L5 transforaminal intervertebral fusion and percutaneous pedicle screw placement...
December 8, 2017: World Neurosurgery
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