questionsmedicales.fr
Système nerveux
Système nerveux central
Encéphale
Prosencéphale
Télencéphale
Cerveau
Cortex cérébral
Cortex sensorimoteur
Cortex visuel
Cortex visuel : Questions médicales fréquentes
Termes MeSH sélectionnés :
Diagnostic
5
Lésion cérébrale
Imagerie par résonance magnétique
Acuité visuelle
Champ visuel
Agnosie
Troubles de la perception
Électroencéphalogramme
Troubles visuels
Vision des couleurs
Test de Ishihara
Symptômes
5
Hallucinations visuelles
Troubles de la vision
Agnosie visuelle
Reconnaissance des objets
Simultagnosie
Perception des mouvements
Migraine oculaire
Troubles visuels
Prévention
5
Traumatismes crâniens
Maladies vasculaires
Examens ophtalmologiques
Troubles visuels
Migraine
Gestion du stress
Santé oculaire
Lunettes de soleil
Traitements
5
Rééducation visuelle
Thérapie occupationnelle
Agnosie
Thérapie cognitive
Rééducation visuelle
Perception visuelle
Hémianopsie
Exercices de champ visuel
Complications
5
Lésion cérébrale
Troubles cognitifs
Hémianopsie
Vie quotidienne
Agnosie
Interactions sociales
Migraine
Troubles de l'humeur
Troubles visuels
Éducation
Facteurs de risque
5
Traumatismes crâniens
AVC
Vieillissement
Dégénérescence
Antécédents familiaux
Troubles neurologiques
Diabète
Rétinopathie diabétique
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"name": "Quelles complications peuvent survenir après une lésion du cortex visuel ?",
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"name": "Comment l'hémianopsie affecte-t-elle la vie quotidienne ?",
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"name": "Comment les troubles visuels peuvent-ils affecter l'éducation ?",
"position": 25,
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"name": "Quels facteurs augmentent le risque de lésions cérébrales ?",
"position": 26,
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"text": "Les traumatismes crâniens, les AVC et les maladies neurodégénératives augmentent le risque."
}
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"name": "Comment l'âge influence-t-il les troubles visuels ?",
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"position": 30,
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Expert en Médecine, Optimisation des Parcours de Soins et Révision Médicale
Validation scientifique effectuée le 21/04/2025
Contenu vérifié selon les dernières recommandations médicales
5 publications dans cette catégorie
Affiliations :
Department of Neuroscience, Baylor College of Medicine, Houston, Texas 77030, USA; email: astolias@bcm.edu.
Center for Neuroscience and Artificial Intelligence, Baylor College of Medicine, Houston, Texas 77030, USA.
Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA.
Publications dans "Cortex visuel" :
3 publications dans cette catégorie
Affiliations :
Department of Neuroscience, Baylor College of Medicine, Houston, Texas 77030, USA; email: astolias@bcm.edu.
Center for Neuroscience and Artificial Intelligence, Baylor College of Medicine, Houston, Texas 77030, USA.
Publications dans "Cortex visuel" :
3 publications dans cette catégorie
Affiliations :
Department of Neuroscience, Baylor College of Medicine, Houston, Texas 77030, USA; email: astolias@bcm.edu.
Center for Neuroscience and Artificial Intelligence, Baylor College of Medicine, Houston, Texas 77030, USA.
Publications dans "Cortex visuel" :
3 publications dans cette catégorie
Affiliations :
Institute of Neuroscience, National Research Council (CNR), I-56124 Pisa, Italy; Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, I-56128 Pisa, Italy. Electronic address: baroncelli@in.cnr.it.
Publications dans "Cortex visuel" :
3 publications dans cette catégorie
Affiliations :
Institute for Computer Science, University Göttingen, Göttingen, Germany.
Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Department of Neurology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
Jamaica Plain VA Medical Center, Boston, Massachusetts 02130, USA.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
National Vision Research Institute, Melbourne, VIC, Australia.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Laboratory for Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Department of Psychology, Stanford University, Stanford, California 94305.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Department of Psychology, Yale University, New Haven, Connecticut 06520.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Laboratoire des systèmes perceptifs, Département d'études cognitives, École normale supérieure, PSL University, CNRS, 75005 Paris, France.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Interdisciplinary Scientist Training Program, University of Chicago Pritzker School of Medicine, Chicago, IL, United States of America.
Committee on Computational Neuroscience, University of Chicago, Chicago, IL, United States of America.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Committee on Computational Neuroscience, University of Chicago, Chicago, IL, United States of America.
Department of Neurobiology, University of Chicago, Chicago, IL, United States of America.
Neuroscience Institute, University of Chicago, Chicago, IL, United States of America.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Committee on Computational Neuroscience, University of Chicago, Chicago, IL, United States of America.
Department of Neurobiology, University of Chicago, Chicago, IL, United States of America.
Neuroscience Institute, University of Chicago, Chicago, IL, United States of America.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Neuroscience Institute, National Research Council (CNR), I-56124 Pisa, Italy.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Neuroscience Institute, National Research Council (CNR), I-56124 Pisa, Italy.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Center for Neuroscience and Artificial Intelligence, Baylor College of Medicine, Houston, TX, USA. eywalker@bcm.edu.
Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA. eywalker@bcm.edu.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Center for Neuroscience and Artificial Intelligence, Baylor College of Medicine, Houston, USA.
Department of Neuroscience, Baylor College of Medicine, Houston, USA.
Publications dans "Cortex visuel" :
2 publications dans cette catégorie
Affiliations :
Center for Neuroscience and Artificial Intelligence, Baylor College of Medicine, Houston, USA.
Department of Neuroscience, Baylor College of Medicine, Houston, USA.
Publications dans "Cortex visuel" :
The choice of appropriate physical quantities to characterize the biological effects of ionizing radiation has evolved over time coupled with advances in scientific understanding. The basic hypothesis...
We quantified the effect of various forward-based treatment-planning strategies in proton therapy on dose-weighted linear energy transfer (LETd). By maintaining the dosimetric quality at a clinically ...
Eight treatment-planning strategies that are achievable in commercial treatment-planning systems were applied on a cylindrical water phantom and four pediatric brain tumor cases. Each planning strateg...
In the phantom study, using a range shifter and altering the robust scenarios during optimization had the largest effect on the mean clinical target volume LETd, which was reduced from 4.5 to 3.9 keV/...
Changes in LETd from treatment-plan setup follow intuitive trends in a controlled phantom experiment. Anatomical and other patient-specific considerations, however, can preclude generalizable strategi...
Compelling evidence shows the association between the relative biological effectiveness (RBE) of carbon-ion radiotherapy (CIRT) and the dose averaged linear energy transfer (LETd). However, the abilit...
This study aims to develop a method of calculating the LETd of CIRT plans that could be robustly carried out in RayStation (V10B, Raysearch, Sweden)....
The calculation used the fragment spectra in RayStation for the CIRT treatment planning. The dose-weighted averaging procedure was supported by the microdosimetric kinetic model (MKM). The MKM-based p...
The differences in LETds of the monoenergetic beams between the new method and the traditional method were within 3% in the entrance and Bragg-peak regions. However, a larger difference was observed i...
The method presented herein reformulates the MKM dose engine in the RayStation TPS to inversely calculate LETds. The robustness and accuracy were demonstrated....
The precise assessment of the dose distribution of high linear energy transfer (LET) radiation remains a challenge, because the signal of most dosimeters will be saturated due to the high ionization d...
Nanoclay radio-fluorogenic gel (NC-RFG) dosimeters were prepared, typically containing 100 μM dihydrorhodamine 123 (DHR123) and 2.0 wt% nanoclay together with catalytic additives promoting Fenton or F...
An NC-RFG dosimeter capable of generating a fluorescence intensity distribution reflecting the carbon-ion beam dose profile was obtained. It was clarified that the reduction of the unfavorable LET dep...
This technique allows the first-ever evaluation of the depth-dose profile of a carbon-ion beam at typical therapeutic levels of several Gy without LET effect....
In modern radiotherapy with photons, the absorbed dose outside the radiation field is generally investigated. But it is well known that the biological damage depends not only on the absorbed dose but ...
The use of radiation with low and high linear energy transfer (LET) in the same treatment regimen is promising in terms of increasing the efficiency and reducing the severity of radiation complication...
Different alpha exposure setups are often used to study the relation between biological responses and LET. This study aimed to estimate the dose heterogeneity and uncertainty in four exposure setups u...
Geant4 was used to estimate the dose distributions in cells grown on a disk exposed to alpha particles penetrating from above and below. The latter setup was simulated without and with a collimator. P...
The LET distributions obtained for simulated setups excluding the collimator were wide and non-Gaussian. Using a collimator resulted in a Gaussian LET distribution, but strongly reduced dose rate and ...
The interpretation of results from radiobiological experiments with alpha particles should always cover the characteristics of the experimental setup, which can be done precisely with computational me...
The correlation between dose-averaged linear energy transfer (LETd) and its therapeutic or adverse effects, especially in carbon-ion radiotherapy (CIRT), remains controversial. This study aimed to inv...
Among patients who underwent CIRT for uterine carcinoma, 101 who were followed up for > 6 months without any other therapy were retrospectively analyzed. The sacrum insufficiency fractures (SIFs) were...
At the last follow-up, 19 patients developed SIFs. Receiver operating characteristic curve analysis revealed that the sacrum D50% RBE-weighted dose was a valuable predictor of SIF. Univariate analyses...
The sacrum D50% RBE-weighted dose was identified as a risk factor for SIF. Additionally, neither LETd nor physical dose parameters were associated with SIF prediction....
The increasing number of studies dealing with linear energy transfer (LET)-based evaluation and optimization in the field of carbon ion radiotherapy (CIRT) indicates the rising demand for LET implemen...
This in silico study was conducted to benchmark the following two LET-related functionalities in a commercial TPS against Monte Carlo simulations: (1) dose averaged LET (LET...
The LET...
For all setups (homogeneous and heterogeneous), the mean absolute (and relative) LET...
No computation error was found in the tested functionalities except for LET...
A fixed relative biological effectiveness (RBE) of 1.1 (RBE...
36 patients treated with passive scattering proton therapy were selected for a case-control study from a cohort of 954 pediatric brain tumor patients. Nine children with symptomatic brainstem toxicity...
LET...
Trends towards higher LET...