keyword
MENU ▼
Read by QxMD icon Read
search

Ocular dominance

keyword
https://www.readbyqxmd.com/read/29160741/the-best-of-both-worlds-adaptation-during-natural-tasks-produces-long-lasting-plasticity-in-perceptual-ocular-dominance
#1
Min Bao, Bo Dong, Lijuan Liu, Stephen A Engel, Yi Jiang
In human vision, one eye is usually stronger than the other. This is called ocular dominance. Extremely imbalanced ocular dominance can be found among certain patient groups, for example, in patients with amblyopia. Here, we introduce a novel method to rebalance ocular dominance. We developed an altered-reality system that subjects used to interact with the natural world, the appearance of which was changed through a real-time image process. Several daily adaptation sessions lasting 3 hr each reduced sensory ocular dominance in adults who were not diagnosed with amblyopia and improved vision in patients with amblyopia...
November 1, 2017: Psychological Science
https://www.readbyqxmd.com/read/29146755/ocular-findings-in-loeys-dietz-syndrome
#2
Catharina Busch, Robert Voitl, Barbara Goergen, Tomasz Zemojtel, Petra Gehle, Daniel J Salchow
BACKGROUND: Loeys-Dietz syndrome (LDS), an autosomal-dominant connective tissue disorder, is characterised by systemic manifestations including arterial aneurysm and craniofacial dysmorphologies. Although ocular involvement in LDS has been reported, detailed information on those manifestations is lacking. METHODS: Retrospective chart review of patients with diagnosed LDS and comparison with age-matched control patients. RESULTS: Mean age was 37...
November 16, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29136273/foxe3-mutations-genotype-phenotype-correlations
#3
J Plaisancié, N K Ragge, H Dollfus, J Kaplan, D Lehalle, C Francannet, G Morin, H Colineaux, P Calvas, N Chassaing
Microphthalmia and anophthalmia (MA) are severe developmental eye anomalies, many of which are likely to have an underlying genetic cause. More than 30 genes have been described, each of which is responsible for a small percentage of these anomalies. Amongst these, is the FOXE3 gene, which was initially described in individuals with dominantly inherited anterior segment dysgenesis and, subsequently, associated with recessively inherited primary aphakia, sclerocornea and microphthalmia. In this work, we describe 8 individuals presenting with a MA phenotype...
November 14, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/29118195/binocular-deprivation-induces-both-age-dependent-and-age-independent-forms-of-plasticity-in-parvalbumin-inhibitory-neuron-visual-response-properties
#4
Berquin D Feese, Diego E Pafundo, Meredith N Schmehl, Sandra J Kuhlman
Activity of cortical inhibitory interneurons is rapidly reduced in response to monocular deprivation during the critical period for ocular dominance plasticity and in response to salient events encountered during learning. In the case of primary sensory cortex, a decrease in mean evoked firing rate of parvalbumin-positive (PV) inhibitory neurons is causally linked to a reorganization of excitatory networks following sensory perturbation. Converging evidence indicates that it is deprivation, and not an imbalance between open and closed eye inputs, that triggers rapid plasticity in PV neurons...
November 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29111362/the-cortical-mechanisms-underlying-ocular-dominance-plasticity-in-adults-are-not-orientationally-selective
#5
Yonghua Wang, Zhimo Yao, Zhifen He, Jiawei Zhou, Robert F Hess
Recently, it has been shown that short-term monocular deprivation in adult humans can temporally shift the ocular dominance in favor of the deprived eye. It is not clear whether this form of ocular dominance plasticity can be explained by cortical contrast adaptation, which is known to be orientationally selective. Here we show that if only one eye is deprived of a limited band of orientations for a short period of 2.5 h, the deprived eye's contribution to binocular function at all orientations rather than just those corresponding to the previously deprived orientations is strengthened...
October 27, 2017: Neuroscience
https://www.readbyqxmd.com/read/29110737/a-microdeletion-in-the-grhl2-gene-in-two-unrelated-patients-with-congenital-fibrosis-of-the-extra-ocular-muscles
#6
Khaled K Abu-Amero, Altaf A Kondkar, Arif O Khan
OBJECTIVE: Congenital fibrosis of the extraocular muscles type 1 (CFEOM1) is known to be caused by mutations in KIF21A or TUBB3 or other known genes (SALL4, CHN1, HOXA1). However, affected children may harbor other genetic defects. Therefore, a candidate gene analysis (KIF21A, TUBB3 SALL4, CHN1, HOXA1) and a high-resolution array comparative genomic hybridization (arrayCGH) was performed in two unrelated children with sporadic CFEOM1. RESULTS: Two unrelated Saudi patients did not have any mutation(s) after sequencing the full coding regions of SALL4, CHN1, HOXA1, and TUBB3 genes; and exons 8, 20, and 21 of the KIF21A gene...
November 6, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29100920/4q25-microdeletion-encompassing-pitx2-a-patient-presenting-with-tetralogy-of-fallot-and-dental-anomalies-without-ocular-features
#7
P Vande Perre, C Zazo Seco, O Patat, L Bouneau, A Vigouroux, D Bourgeois, S El Hout, N Chassaing, P Calvas
Axenfeld-Rieger syndrome (ARS) is a heterogeneous clinical entity transmitted in an autosomal dominant manner. The main feature, Axenfeld-Rieger Anomaly (ARA), is a malformation of the anterior segment of the eye that can lead to glaucoma and impair vision. Extra-ocular defects have also been reported. Point mutations of FOXC1 and PITX2 are responsible for about 40% of the ARS cases. We describe the phenotype of a patient carrying a deletion encompassing the 4q25 locus containing PITX2 gene. This child presented with a congenital heart defect (Tetralogy of Fallot, TOF) and no signs of ARA...
October 31, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29097542/lattice-system-of-functionally-distinct-cell-types-in-the-neocortex
#8
Hisato Maruoka, Nao Nakagawa, Shun Tsuruno, Seiichiro Sakai, Taisuke Yoneda, Toshihiko Hosoya
The mammalian neocortex contains many cell types, but whether they organize into repeated structures has been unclear. We discovered that major cell types in neocortical layer 5 form a lattice structure in many brain areas. Large-scale three-dimensional imaging revealed that distinct types of excitatory and inhibitory neurons form cell type-specific radial clusters termed microcolumns. Thousands of microcolumns, in turn, are patterned into a hexagonal mosaic tessellating diverse regions of the neocortex. Microcolumn neurons demonstrate synchronized in vivo activity and visual responses with similar orientation preference and ocular dominance...
November 3, 2017: Science
https://www.readbyqxmd.com/read/29090482/sighting-ocular-dominance-magnitude-varies-with-test-distance
#9
Raymond Ho, Benjamin Thompson, Raiju J Babu, Kristine Dalton
BACKGROUND: Ocular dominance can be defined as the preference of an individual for viewing with one eye over the other for particular visual tasks. It is relevant to monovision contact lens wear, cataract surgery and sports vision. Clinically, the measurement of ocular dominance is typically done at an arbitrary distance using a sighting test, such as the hole-in-card method that has a binary outcome. We investigated the effect of test distance on ocular dominance measured using a binocular sighting test that provided a continuous measurement of dominance...
October 31, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29089023/phenotype-variability-in-a-large-spanish-family-with-alport-syndrome-associated-with-novel-mutations-in-col4a3-gene
#10
C Cervera-Acedo, A Coloma, E Huarte-Loza, M Sierra-Carpio, E Domínguez-Garrido
BACKGROUND: Alport syndrome is an inherited renal disorder characterized by glomerular basement membrane lesions with hematuria, proteinuria and frequent hearing defects and ocular abnormalities. The disease is associated with mutations in genes encoding α3, α4, or α5 chains of type IV collagen, namely COL4A3 and COL4A4 in chromosome 2 and COL4A5 in chromosome X. In contrast to the well-known X-linked and autosomal recessive phenotypes, there is very little information about the autosomal dominant...
October 31, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29073219/environmental-enrichment-accelerates-ocular-dominance-plasticity-in-mouse-visual-cortex-whereas-transfer-to-standard-cages-resulted-in-a-rapid-loss-of-increased-plasticity
#11
Evgenia Kalogeraki, Justyna Pielecka-Fortuna, Siegrid Löwel
In standard cage (SC) raised mice, experience-dependent ocular dominance (OD) plasticity in the primary visual cortex (V1) rapidly declines with age: in postnatal day 25-35 (critical period) mice, 4 days of monocular deprivation (MD) are sufficient to induce OD-shifts towards the open eye; thereafter, 7 days of MD are needed. Beyond postnatal day 110, even 14 days of MD failed to induce OD-plasticity in mouse V1. In contrast, mice raised in a so-called "enriched environment" (EE), exhibit lifelong OD-plasticity...
2017: PloS One
https://www.readbyqxmd.com/read/29064828/differences-in-head-impulse-test-results-due-to-analysis-techniques
#12
Taylor W Cleworth, Mark G Carpenter, Flurin Honegger, John H J Allum
BACKGROUND: Different analysis techniques are used to define vestibulo-ocular reflex (VOR) gain between eye and head angular velocity during the video head impulse test (vHIT). Comparisons would aid selection of gain techniques best related to head impulse characteristics and promote standardisation. OBJECTIVE: Compare and contrast known methods of calculating vHIT VOR gain. METHODS: We examined lateral canal vHIT responses recorded from 20 patients twice within 13 weeks of acute unilateral peripheral vestibular deficit onset...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29054766/rethinking-genotype-phenotype-correlations-in-papillorenal-syndrome-a-case-report-on-an-unusual-congenital-camptodactyly-and-skeletal-deformity-with-a-heterogeneous-pax2-mutation-of-hexanucleotide-duplication
#13
Jiewei Liu, Ping Wang, Juan Huang, Zihua Yu
Papillorenal syndrome (PRS), an autosomal dominant inherited condition, is clinically featured by renal hypoplasia and optic nerve dysplasia. Based on current knowledge of genotype-phenotype correlations in PRS, mutations in the Paired box 2 (PAX2) gene have been recognized as a critical pathogenesis of typical renal and optic disease manifestations. However, little information is currently available on the skeletal abnormalities of PRS and the potential contribution of PAX2 mutations. Here, we present a case of a 10-year-old female PRS patient with the typical features of chronic renal failure and severe myopia, but was unexpectedly discovered camptodactyly of her left middle finger which affects the proximal interphalangeal joint...
October 17, 2017: Gene
https://www.readbyqxmd.com/read/29053045/relationship-between-ocular-dominance-and-brow-position-in-patients-with-blepharoptosis
#14
Andrew W Thorne, Rao V Chundury, Julian D Perry, Daniel B Rootman
PURPOSE: This study aims to determine if ocular dominance plays a role in predicting compensatory eyebrow elevation in cases of ptosis. METHODS: This retrospective observational cohort study screened all individuals presenting to two tertiary oculoplastics practices with complaints of ptosis for entry. Primary position photographs were obtained. Ocular dominance was assessed via a modified Porta test. Ptosis was defined in bilateral cases as marginal reflex distance of <2...
October 20, 2017: Orbit
https://www.readbyqxmd.com/read/29052606/the-evolution-of-eyes-major-steps-the-keeler-lecture-2017-centenary-of-keeler-ltd
#15
I R Schwab
Ocular evolution is an immense topic, and I do not expect to cover all the details of this process in this manuscript. I will present some concepts about some of the major steps in the evolutionary process to stimulate your thinking about this interesting and complex topic. In the prebiotic soup, vision was not inevitable. Eyes were not preordained. Nor were their shapes, sizes, or current physiology. Sight is an evolutionary gift but it was not ineluctable. The existence of eyes is so basic to our profession that we often do not consider how and why vision appeared or evolved on earth at all...
October 20, 2017: Eye
https://www.readbyqxmd.com/read/29050191/-the-ocular-involvement-in-the-transthyretin-related-familial-amyloid-polyneuropathy
#16
H Y Lin, R P Dai
Transthyretin (TTR)-related familial amyloid polyneuropathy (FAP), which is caused by mutant TTR, is a rare but fatal autosomal dominant disease. TTR is synthesized by the liver (95%) , the choroid plexus of the brain and the retinal pigment epithelium. FAP leads to peripheral neuropathy, and the main ocular manifestations are vitreous opacity (yellowish cotton-like), secondary glaucoma and keratoconjunctivitis sicca. Liver transplantation has proven to be the most effective treatment for TTR-FAP. Nowadays, tafamidis is the only drug approved for TTR-FAP (early stage)...
October 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29046375/left-right-asymmetry-of-the-maxwell-spot-centroids-in-adults-without-and-with-dyslexia
#17
Albert Le Floch, Guy Ropars
In human vision, the brain has to select one view of the world from our two eyes. However, the existence of a clear anatomical asymmetry providing an initial imbalance for normal neural development is still not understood. Using a so-called foveascope, we found that for a cohort of 30 normal adults, the two blue cone-free areas at the centre of the foveas are asymmetrical. The noise-stimulated afterimage dominant eye introduced here corresponds to the circular blue cone-free area, while the non-dominant eye corresponds to the diffuse and irregular elliptical outline...
October 25, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29042737/nance-horan-syndrome-a-rare-case-report
#18
Shambhu Sharma, Pankaj Datta, Janak Raj Sabharwal, Sonia Datta
Dentofacial anomalies may guide us to the diagnosis of many congenital and hereditary syndromes. A 9-year-old boy was diagnosed with Nance-Horan syndrome. This syndrome is an extremely rare X-linked genetic disorder which is entirely expressed in males with semi-dominant transmission which results from mutations occurring in male gametes. It is characterized by facial dysmorphism such as long face, prominent nose and mandibular prognathism, ocular abnormalities such as congenital cataract, microcornea, microphthalmia and strabismus, and dental anomalies including mulberry molars and screwdriver-shaped incisors...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29031852/inhibition-of-cdk5-rejuvenates-inhibitory-circuits-and-restores-experience-dependent-plasticity-in-adult-visual-cortex
#19
Yue Li, Laijian Wang, Xinxin Zhang, Mengyao Huang, Sitong Li, Xinxing Wang, Lin Chen, Bin Jiang, Yupeng Yang
Cyclin-dependent kinase 5 (Cdk5) acts as an essential modulator for neural development and neurological disorders. Here we show that Cdk5 plays a pivotal role in modulating GABAergic signaling and the maturation of visual system. In adult mouse primary visual cortex, Cdk5 formed complex with the GABA synthetic enzyme glutamate decarboxylase GAD67, but not with GAD65. In addition to enhancement in the surface level of NR2B-containing NMDA receptors, inhibition of Cdk5 reduced the protein levels of GADs and Otx2, while leaving intact the expression of vesicular GABA transporter and subunits of GABAA or AMPA receptors...
October 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29019756/imaging-of-skeletal-disorders-caused-by-fibroblast-growth-factor-receptor-gene-mutations
#20
Kiran M Sargar, Achint K Singh, Simon C Kao
Fibroblast growth factors and fibroblast growth factor receptors (FGFRs) play important roles in human axial and craniofacial skeletal development. FGFR1, FGFR2, and FGFR3 are crucial for both chondrogenesis and osteogenesis. Mutations in the genes encoding FGFRs, types 1-3, are responsible for various skeletal dysplasias and craniosynostosis syndromes. Many of these disorders are relatively common in the pediatric population, and diagnosis is often challenging. These skeletal disorders can be classified based on which FGFR is affected...
October 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
keyword
keyword
72805
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"