Titre : Barrière hémato-encéphalique

Barrière hémato-encéphalique : Questions médicales fréquentes

Termes MeSH sélectionnés :

Visual Acuity
{ "@context": "https://schema.org", "@graph": [ { "@type": "MedicalWebPage", "name": "Barrière hémato-encéphalique : Questions médicales les plus fréquentes", "headline": "Barrière hémato-encéphalique : Comprendre les symptômes, diagnostics et traitements", "description": "Guide complet et accessible sur les Barrière hémato-encéphalique : explications, diagnostics, traitements et prévention. Information médicale validée destinée aux patients.", "datePublished": "2024-02-05", "dateModified": "2025-04-30", "inLanguage": "fr", "medicalAudience": [ { "@type": "MedicalAudience", "name": "Grand public", "audienceType": "Patient", "healthCondition": { "@type": "MedicalCondition", "name": "Barrière hémato-encéphalique" }, "suggestedMinAge": 18, "suggestedGender": "unisex" }, { "@type": "MedicalAudience", "name": "Médecins", "audienceType": "Physician", "geographicArea": { "@type": "AdministrativeArea", "name": "France" } }, { "@type": "MedicalAudience", "name": "Chercheurs", "audienceType": "Researcher", "geographicArea": { "@type": "AdministrativeArea", "name": "International" } } ], "reviewedBy": { "@type": "Person", "name": "Dr Olivier Menir", "jobTitle": "Expert en Médecine", "description": "Expert en Médecine, Optimisation des Parcours de Soins et Révision Médicale", "url": "/static/pages/docteur-olivier-menir.html", "alumniOf": { "@type": "EducationalOrganization", "name": "Université Paris Descartes" } }, "isPartOf": { "@type": "MedicalWebPage", "name": "Encéphale", "url": "https://questionsmedicales.fr/mesh/D001921", "about": { "@type": "MedicalCondition", "name": "Encéphale", "code": { "@type": "MedicalCode", "code": "D001921", "codingSystem": "MeSH" }, "identifier": { "@type": "PropertyValue", "propertyID": "MeSH Tree", "value": "A08.186.211" } } }, "about": { "@type": "MedicalCondition", "name": "Barrière hémato-encéphalique", "alternateName": "Blood-Brain Barrier", "code": { "@type": "MedicalCode", "code": "D001812", "codingSystem": "MeSH" } }, "author": [ { "@type": "Person", "name": "William A Banks", "url": "https://questionsmedicales.fr/author/William%20A%20Banks", "affiliation": { "@type": "Organization", "name": "Geriatric Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, United States; Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington School of Medicine, Seattle, WA, United States." } }, { "@type": "Person", "name": "Elizabeth M Rhea", "url": "https://questionsmedicales.fr/author/Elizabeth%20M%20Rhea", "affiliation": { "@type": "Organization", "name": "Geriatric Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, United States; Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington School of Medicine, Seattle, WA, United States. Electronic address: meredime@uw.edu." } }, { "@type": "Person", "name": "Chenghua Gu", "url": "https://questionsmedicales.fr/author/Chenghua%20Gu", "affiliation": { "@type": "Organization", "name": "Department of Neurobiology, Harvard Medical School, 220 Longwood Ave., Boston, MA 02115, USA. Electronic address: chenghua_gu@hms.harvard.edu." } }, { "@type": "Person", "name": "Michelle A Erickson", "url": "https://questionsmedicales.fr/author/Michelle%20A%20Erickson", "affiliation": { "@type": "Organization", "name": "Geriatrics Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA." } }, { "@type": "Person", "name": "Steffen E Storck", "url": "https://questionsmedicales.fr/author/Steffen%20E%20Storck", "affiliation": { "@type": "Organization", "name": "Institute for Pathobiochemistry, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany." } } ], "citation": [ { "@type": "ScholarlyArticle", "name": "Prediction of Visual Acuity in Patients With Microbial Keratitis.", "datePublished": "2022-10-17", "url": "https://questionsmedicales.fr/article/36256452", "identifier": { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1097/ICO.0000000000003129" } }, { "@type": "ScholarlyArticle", "name": "Average paraxial power of a lens and visual acuity.", "datePublished": "2023-05-02", "url": "https://questionsmedicales.fr/article/37130981", "identifier": { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1038/s41598-023-34010-4" } }, { "@type": "ScholarlyArticle", "name": "Impact of myopia control spectacle lenses with highly aspherical lenslets on peripheral visual acuity and central visual acuity with peripheral gaze.", "datePublished": "2023-03-14", "url": "https://questionsmedicales.fr/article/36916874", "identifier": { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1111/opo.13127" } }, { "@type": "ScholarlyArticle", "name": "Factors Affecting Visual Acuity and Central Visual Function in Glaucoma Patients With Myopia.", "datePublished": "2023-05-12", "url": "https://questionsmedicales.fr/article/37178947", "identifier": { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1016/j.ajo.2023.05.012" } }, { "@type": "ScholarlyArticle", "name": "Measuring recognition visual acuity in young children - testability with the Waterloo Differential Acuity Test (WatDAT).", "datePublished": "2022-11-20", "url": "https://questionsmedicales.fr/article/36403264", "identifier": { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1080/08164622.2022.2141101" } } ], "breadcrumb": { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "questionsmedicales.fr", "item": "https://questionsmedicales.fr" }, { "@type": "ListItem", "position": 2, "name": "Système nerveux", "item": "https://questionsmedicales.fr/mesh/D009420" }, { "@type": "ListItem", "position": 3, "name": "Système nerveux central", "item": "https://questionsmedicales.fr/mesh/D002490" }, { "@type": "ListItem", "position": 4, "name": "Encéphale", "item": "https://questionsmedicales.fr/mesh/D001921" }, { "@type": "ListItem", "position": 5, "name": "Barrière hémato-encéphalique", "item": "https://questionsmedicales.fr/mesh/D001812" } ] } }, { "@type": "MedicalWebPage", "name": "Article complet : Barrière hémato-encéphalique - Questions et réponses", "headline": "Questions et réponses médicales fréquentes sur Barrière hémato-encéphalique", "description": "Une compilation de questions et réponses structurées, validées par des experts médicaux.", "datePublished": "2025-05-16", "inLanguage": "fr", "hasPart": [ { "@type": "MedicalWebPage", "name": "Diagnostic", "headline": "Diagnostic sur Barrière hémato-encéphalique", "description": "Comment évaluer l'intégrité de la barrière hémato-encéphalique ?\nQuels signes indiquent une défaillance de la barrière ?\nQuels tests sanguins sont utiles pour le diagnostic ?\nLa biopsie est-elle nécessaire pour le diagnostic ?\nQuels examens neurologiques sont recommandés ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Visual+Acuity&page=2#section-diagnostic" }, { "@type": "MedicalWebPage", "name": "Symptômes", "headline": "Symptômes sur Barrière hémato-encéphalique", "description": "Quels symptômes sont associés à une barrière défaillante ?\nLa confusion mentale est-elle un symptôme ?\nDes convulsions peuvent-elles se produire ?\nQuels symptômes neurologiques sont préoccupants ?\nLa fatigue chronique est-elle liée à cette condition ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Visual+Acuity&page=2#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": "Prévention sur Barrière hémato-encéphalique", "description": "Comment prévenir les troubles de la barrière hémato-encéphalique ?\nLes vaccinations sont-elles importantes ?\nLe contrôle de la pression artérielle aide-t-il ?\nL'alimentation joue-t-elle un rôle ?\nLe stress peut-il affecter la barrière ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Visual+Acuity&page=2#section-prévention" }, { "@type": "MedicalWebPage", "name": "Traitements", "headline": "Traitements sur Barrière hémato-encéphalique", "description": "Quels traitements sont disponibles pour les troubles de la barrière ?\nLa chirurgie est-elle une option de traitement ?\nLes corticostéroïdes sont-ils utilisés ?\nY a-t-il des traitements expérimentaux ?\nComment la rééducation peut-elle aider ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Visual+Acuity&page=2#section-traitements" }, { "@type": "MedicalWebPage", "name": "Complications", "headline": "Complications sur Barrière hémato-encéphalique", "description": "Quelles complications peuvent survenir ?\nLes AVC sont-ils une complication possible ?\nDes troubles cognitifs peuvent-ils se développer ?\nLa démence est-elle une complication ?\nLes troubles psychiatriques sont-ils possibles ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Visual+Acuity&page=2#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Barrière hémato-encéphalique", "description": "Quels facteurs augmentent le risque de défaillance ?\nLe diabète est-il un facteur de risque ?\nL'alcoolisme influence-t-il la barrière ?\nLe tabagisme est-il un risque ?\nLes infections virales sont-elles préoccupantes ?", "url": "https://questionsmedicales.fr/mesh/D001812?mesh_terms=Visual+Acuity&page=2#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment évaluer l'intégrité de la barrière hémato-encéphalique ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Des tests d'imagerie comme l'IRM et des analyses de liquide céphalorachidien sont utilisés." } }, { "@type": "Question", "name": "Quels signes indiquent une défaillance de la barrière ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes neurologiques, des infections ou des inflammations peuvent indiquer une défaillance." } }, { "@type": "Question", "name": "Quels tests sanguins sont utiles pour le diagnostic ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Des tests pour détecter des anticorps ou des marqueurs inflammatoires peuvent être effectués." } }, { "@type": "Question", "name": "La biopsie est-elle nécessaire pour le diagnostic ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Rarement, sauf dans des cas spécifiques comme les tumeurs cérébrales ou infections." } }, { "@type": "Question", "name": "Quels examens neurologiques sont recommandés ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Des examens neurologiques complets, y compris des tests de réflexes et de coordination." } }, { "@type": "Question", "name": "Quels symptômes sont associés à une barrière défaillante ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Des maux de tête, des troubles de la vision, et des changements de comportement peuvent survenir." } }, { "@type": "Question", "name": "La confusion mentale est-elle un symptôme ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la confusion mentale peut résulter d'une altération de la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "Des convulsions peuvent-elles se produire ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des convulsions peuvent être un signe d'irritation cérébrale due à une défaillance." } }, { "@type": "Question", "name": "Quels symptômes neurologiques sont préoccupants ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Des engourdissements, des faiblesses musculaires ou des troubles de l'équilibre sont préoccupants." } }, { "@type": "Question", "name": "La fatigue chronique est-elle liée à cette condition ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la fatigue chronique peut être un symptôme associé à des troubles de la barrière." } }, { "@type": "Question", "name": "Comment prévenir les troubles de la barrière hémato-encéphalique ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Maintenir un mode de vie sain, éviter les toxines et gérer les maladies chroniques aide." } }, { "@type": "Question", "name": "Les vaccinations sont-elles importantes ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les vaccinations peuvent prévenir certaines infections qui affectent la barrière." } }, { "@type": "Question", "name": "Le contrôle de la pression artérielle aide-t-il ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Oui, un bon contrôle de la pression artérielle peut réduire le risque de défaillance." } }, { "@type": "Question", "name": "L'alimentation joue-t-elle un rôle ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Une alimentation équilibrée riche en antioxydants peut protéger la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "Le stress peut-il affecter la barrière ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le stress chronique peut avoir un impact négatif sur la santé de la barrière." } }, { "@type": "Question", "name": "Quels traitements sont disponibles pour les troubles de la barrière ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent des médicaments anti-inflammatoires et des thérapies ciblées." } }, { "@type": "Question", "name": "La chirurgie est-elle une option de traitement ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "La chirurgie peut être nécessaire pour retirer des tumeurs ou traiter des infections." } }, { "@type": "Question", "name": "Les corticostéroïdes sont-ils utilisés ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les corticostéroïdes peuvent réduire l'inflammation et améliorer la fonction de la barrière." } }, { "@type": "Question", "name": "Y a-t-il des traitements expérimentaux ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Des traitements expérimentaux incluent des thérapies géniques et des médicaments innovants." } }, { "@type": "Question", "name": "Comment la rééducation peut-elle aider ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "La rééducation peut aider à restaurer les fonctions neurologiques altérées par des troubles." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Des infections, des inflammations et des troubles neurologiques graves peuvent survenir." } }, { "@type": "Question", "name": "Les AVC sont-ils une complication possible ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, une défaillance de la barrière peut augmenter le risque d'accidents vasculaires cérébraux." } }, { "@type": "Question", "name": "Des troubles cognitifs peuvent-ils se développer ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des troubles cognitifs peuvent résulter d'une altération prolongée de la barrière." } }, { "@type": "Question", "name": "La démence est-elle une complication ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certaines formes de démence peuvent être liées à des dysfonctionnements de la barrière." } }, { "@type": "Question", "name": "Les troubles psychiatriques sont-ils possibles ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des troubles psychiatriques peuvent être exacerbés par des problèmes de barrière." } }, { "@type": "Question", "name": "Quels facteurs augmentent le risque de défaillance ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "L'âge avancé, les maladies auto-immunes et les infections sont des facteurs de risque." } }, { "@type": "Question", "name": "Le diabète est-il un facteur de risque ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le diabète peut affecter la santé de la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "L'alcoolisme influence-t-il la barrière ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'alcoolisme chronique peut endommager la barrière hémato-encéphalique." } }, { "@type": "Question", "name": "Le tabagisme est-il un risque ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le tabagisme est associé à une augmentation des troubles neurologiques." } }, { "@type": "Question", "name": "Les infections virales sont-elles préoccupantes ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certaines infections virales peuvent compromettre la barrière hémato-encéphalique." } } ] } ] }

Sources (10000 au total)

Prediction of Visual Acuity in Patients With Microbial Keratitis.

The purpose of this study was to predict visual acuity (VA) 90 days after presentation for patients with microbial keratitis (MK) from data at the initial clinical ophthalmic encounter.... Patients with MK were identified in the electronic health record between August 2012 and February 2021. Random forest (RF) models were used to predict 90-day VA < 20/40 [visual impairment (VI)]. Predi... One thousand seven hundred ninety-one patients were identified. The presenting logMAR VA was on average 0.86 (Snellen equivalent and standard deviation = 20/144 ± 12.6 lines) in the affected or worse ... RF modeling yielded good sensitivity and specificity to predict VI at 90 days which could guide clinicians about the risk of poor vision outcomes for patients with MK....

Impact of myopia control spectacle lenses with highly aspherical lenslets on peripheral visual acuity and central visual acuity with peripheral gaze.

Myopia control spectacle lenses with peripheral lenslets are gaining popularity because they are non-invasive and easy to manage, and ongoing clinical trials have shown promising results. This study a... High-contrast (100%) VA was measured at 300 cm and 10 lx. For each test, two lens designs were evaluated in counterbalanced order: a spectacle lens with highly aspherical lenslets (HALs) and a standar... Mean (SD) central VAs with peripheral gaze through the SVL and the HAL lens were 0.08 (0.13) and 0.17 (0.12) logMAR, respectively. The HAL lens reduced central VA with peripheral gaze by 0.10 (0.08) l... Under high-contrast and low-luminance conditions, the HAL lens reduced central VA with peripheral gaze by approximately one line compared with the SVL. The impact on central VA did not vary with gaze ...

Factors Affecting Visual Acuity and Central Visual Function in Glaucoma Patients With Myopia.

To investigate associated factors including structural parameters of myopia and vessel density (VD) using optical coherence tomography angiography (OCT-A) to visual acuity (VA) and central visual func... Retrospective cross-sectional study.... Sixty-five eyes of 60 glaucoma patients with myopia and without media opacity and retinal lesions were included. Both Swedish interactive thresholding algorithm (SITA) 24-2 and 10-2 visual field (VF) ... The worse mean deviation of SITA 24-2, thinner GCIPL thickness, and lower deep peripapillary VD were associated with the presence of central VF damage in glaucoma patients with myopia. Thinner GCIPL t... Decreased VA in glaucoma patients with myopia was associated with lower deep peripapillary VD and papillomacular bundle damage. Lower deep peripapillary VD was independently associated with decreased ...

Measuring recognition visual acuity in young children - testability with the Waterloo Differential Acuity Test (WatDAT).

Visual acuity measurement is important for the detection and monitoring of eye disorders. Developing accurate and sensitive visual acuity tests suitable for young children is therefore desirable.... Recognition or form visual acuity (VA), which is measured with matching in children aged 3 years and up, is more sensitive for detecting visual deficits compared to resolution VA. The Waterloo Differe... Fifty-one typically-developing children aged 12-36 months participated in the study. Data for Patti Pics (PP) and Face targets (FT) were collected for formats with 3, 4 and 5 distractors. The targets ... Of participants aged 18-36 months, 87% could perform the WatDAT PP targets with 3 distractors compared to 68% for the FT, while 48% could perform matching with PP. The testability for FT increased to ... WatDAT testability is higher than matching VA tests. This indicates that the newly developed WatDAT has potential for measuring recognition VA in children 18 months and older....

Agreement between a mobile applet-based visual acuity self-test program and the conventional method for distance and near visual acuity tests.

To investigate the agreement between a mobile applet-based visual acuity (VA) self-test program and the conventional VA tests.... This consecutive case series study included 121 children and adults (242 eyes). Patients were classified into three groups according to age (children, adolescents, and adults). They underwent uncorrec... Correlations among UDVA, DVA with ASC, UNVA, and NVA with ASC between the two methods were significant in all subjects (all p < 0.001). The intraclass correlation coefficient were 0.960, 0.845, 0.960,... There is good agreement between the mobile applet-based VA self-test program and the conventional VA tests. The VA self-test has good practical value especially in the current pandemic, allowing self-...

Evaluation of a visual acuity eHealth tool in patients with cataract.

To validate the Easee web-based tool for the assessment of visual acuity in patients who underwent cataract surgery.... University Eye Clinic Maastricht, Maastricht, the Netherlands.... Prospective method comparison study.... Subjects aged between 18 and 69 years who underwent cataract surgery on 1 or both eyes at the Maastricht University Medical Center+ were eligible to participate in this study. The uncorrected (UDVA) a... 46 subjects with 75 operated eyes were included in this study. The difference of the UDVA between the web-based tool and ETDRS or Snellen was -0.05 ± 0.10 logMAR ( P < .001 [0.15; -0.26]) and -0.04 ± ... The web-based tool was validated for the assessment of visual acuity in patients who underwent cataract surgery and showed clinically acceptable outcomes in up to 88% of patients. Most of the particip...

Early visual intervention, visual function analysis, and grating visual acuity outcomes in children with congenital Zika syndrome.

This study aimed to assess grating visual acuity and functional vision in children with congenital Zika syndrome.... Initial and final grating visual acuity was measured using Teller acuity cards. Cerebral vision impairment standardized tests were used to assess functional vision. Patients were referred to the early... In this study, 10 children were included with an age range of 1-37 months. Eight patients presented with macular atrophic scars. Neuroimaging revealed microcephaly and cerebral abnormalities in all pa... The grating visual acuity test revealed low vision in all children with congenital Zika syndrome. Functional vision evaluation revealed cerebral vision impairment characteristics in all patients, who ...