Titre : Gaine de myéline

Gaine de myéline : Questions médicales fréquentes

Termes MeSH sélectionnés :

Diffusion Tensor Imaging
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à la démyélinisation ?", "url": "https://questionsmedicales.fr/mesh/D009186?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-diagnostic" }, { "@type": "MedicalWebPage", "name": "Symptômes", "headline": "Symptômes sur Gaine de myéline", "description": "Quels sont les symptômes d'une démyélinisation ?\nLa douleur est-elle un symptôme courant ?\nComment la démyélinisation affecte-t-elle la coordination ?\nLes troubles cognitifs sont-ils liés à la démyélinisation ?\nLes symptômes varient-ils d'une personne à l'autre ?", "url": "https://questionsmedicales.fr/mesh/D009186?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": "Prévention sur Gaine de myéline", "description": "Peut-on prévenir la démyélinisation ?\nL'alimentation joue-t-elle un rôle ?\nLe stress influence-t-il la démyélinisation ?\nL'exercice physique est-il recommandé ?\nLes vaccinations sont-elles importantes ?", "url": "https://questionsmedicales.fr/mesh/D009186?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-prévention" }, { "@type": "MedicalWebPage", "name": "Traitements", "headline": "Traitements sur Gaine de myéline", "description": "Quels traitements existent pour la démyélinisation ?\nLa rééducation est-elle utile ?\nLes corticostéroïdes sont-ils efficaces ?\nY a-t-il des traitements expérimentaux ?\nLes traitements sont-ils curatifs ?", "url": "https://questionsmedicales.fr/mesh/D009186?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-traitements" }, { "@type": "MedicalWebPage", "name": "Complications", "headline": "Complications sur Gaine de myéline", "description": "Quelles complications peuvent survenir ?\nLa dépression est-elle une complication fréquente ?\nLes troubles de la vision peuvent-ils s'aggraver ?\nY a-t-il un risque accru de handicap ?\nLes complications sont-elles réversibles ?", "url": "https://questionsmedicales.fr/mesh/D009186?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Gaine de myéline", "description": "Quels sont les principaux facteurs de risque ?\nLe sexe influence-t-il le risque ?\nLe tabagisme est-il un facteur de risque ?\nL'exposition à des toxines joue-t-elle un rôle ?\nLe climat a-t-il un impact sur le risque ?", "url": "https://questionsmedicales.fr/mesh/D009186?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment diagnostiquer une démyélinisation ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Un IRM peut révéler des lésions de myéline dans le système nerveux central." } }, { "@type": "Question", "name": "Quels tests sont utilisés pour évaluer la myéline ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Les potentiels évoqués et les tests neurologiques aident à évaluer la fonction myélinique." } }, { "@type": "Question", "name": "Quels signes indiquent une atteinte de la myéline ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes comme des troubles de la coordination ou des engourdissements peuvent indiquer une atteinte." } }, { "@type": "Question", "name": "La biopsie nerveuse est-elle nécessaire ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Rarement, mais elle peut être utilisée pour confirmer des maladies spécifiques de la myéline." } }, { "@type": "Question", "name": "Quels marqueurs biologiques sont associés à la démyélinisation ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Des niveaux élevés d'anticorps spécifiques peuvent indiquer une démyélinisation." } }, { "@type": "Question", "name": "Quels sont les symptômes d'une démyélinisation ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes incluent fatigue, troubles de la vision, et faiblesse musculaire." } }, { "@type": "Question", "name": "La douleur est-elle un symptôme courant ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des douleurs neuropathiques peuvent survenir en raison de la démyélinisation." } }, { "@type": "Question", "name": "Comment la démyélinisation affecte-t-elle la coordination ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Elle peut provoquer des troubles de l'équilibre et des mouvements maladroits." } }, { "@type": "Question", "name": "Les troubles cognitifs sont-ils liés à la démyélinisation ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des problèmes de mémoire et de concentration peuvent survenir." } }, { "@type": "Question", "name": "Les symptômes varient-ils d'une personne à l'autre ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'intensité et le type de symptômes peuvent varier considérablement." } }, { "@type": "Question", "name": "Peut-on prévenir la démyélinisation ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Il n'existe pas de méthode garantie, mais un mode de vie sain peut réduire les risques." } }, { "@type": "Question", "name": "L'alimentation joue-t-elle un rôle ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Une alimentation riche en oméga-3 et en antioxydants peut être bénéfique." } }, { "@type": "Question", "name": "Le stress influence-t-il la démyélinisation ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le stress peut aggraver les symptômes et déclencher des poussées." } }, { "@type": "Question", "name": "L'exercice physique est-il recommandé ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'exercice régulier peut améliorer la santé neurologique et physique." } }, { "@type": "Question", "name": "Les vaccinations sont-elles importantes ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Certaines vaccinations peuvent aider à prévenir des infections qui aggravent la démyélinisation." } }, { "@type": "Question", "name": "Quels traitements existent pour la démyélinisation ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent des médicaments immunomodulateurs et des thérapies symptomatiques." } }, { "@type": "Question", "name": "La rééducation est-elle utile ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la rééducation physique peut aider à améliorer la fonction et la mobilité." } }, { "@type": "Question", "name": "Les corticostéroïdes sont-ils efficaces ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Ils peuvent réduire l'inflammation et accélérer la récupération lors des poussées." } }, { "@type": "Question", "name": "Y a-t-il des traitements expérimentaux ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Des thérapies géniques et des traitements à base de cellules souches sont en cours d'étude." } }, { "@type": "Question", "name": "Les traitements sont-ils curatifs ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Non, ils visent principalement à gérer les symptômes et à ralentir la progression." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Des complications incluent des infections, des troubles de la mobilité et des douleurs chroniques." } }, { "@type": "Question", "name": "La dépression est-elle une complication fréquente ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la dépression est courante chez les personnes atteintes de démyélinisation." } }, { "@type": "Question", "name": "Les troubles de la vision peuvent-ils s'aggraver ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des troubles visuels peuvent s'aggraver avec la progression de la maladie." } }, { "@type": "Question", "name": "Y a-t-il un risque accru de handicap ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la démyélinisation peut entraîner un handicap physique ou cognitif à long terme." } }, { "@type": "Question", "name": "Les complications sont-elles réversibles ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Certaines complications peuvent être gérées, mais beaucoup ne sont pas réversibles." } }, { "@type": "Question", "name": "Quels sont les principaux facteurs de risque ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Les facteurs incluent des antécédents familiaux, l'âge et des infections virales." } }, { "@type": "Question", "name": "Le sexe influence-t-il le risque ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les femmes sont plus susceptibles de développer des maladies démyélinisantes." } }, { "@type": "Question", "name": "Le tabagisme est-il un facteur de risque ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le tabagisme est associé à un risque accru de démyélinisation." } }, { "@type": "Question", "name": "L'exposition à des toxines joue-t-elle un rôle ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'exposition à certaines toxines environnementales peut augmenter le risque." } }, { "@type": "Question", "name": "Le climat a-t-il un impact sur le risque ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des études montrent que les personnes vivant dans des climats froids ont un risque plus élevé." } } ] } ] }

Sources (10000 au total)

Advanced muscle imaging in adolescent elite rowers utilizing diffusion tensor imaging: Association of imaging findings with stroke typology.

Muscular overuse injuries are a common health issue in elite athletes. Changes in the muscular microenvironment can be depicted by Diffusion Tensor Imaging (DTI). We hypothesize that the biomechanics ... Twenty-two male elite rowers (12 sweep, 10 scull rowers) with a mean age of 15.8 ± 1.2 years underwent 3-Tesla MRI of the lumbar spine 6 hours after cessation of training. Apparent diffusion coefficie... ADC values in the erector spinae and multifidus muscle were significantly higher (p = 0.039) and FA values significantly lower (p < 0.001) in sweep rowers compared to scull rowers. There was no signif... Our DTI results show that lumbar spine muscle diffusivity is higher in sweep rowers than in scull rowers. Altered muscle diffusivity is suggestive of microscopic tissue disruption and might be attribu...

Evaluating the renal mild tubulointerstitial damage and renal function in IgAN patients: a comparative study based on diffusion kurtosis imaging and diffusion tensor imaging.

To compare the performance of 3.0 T magnetic resonance diffusion kurtosis imaging (DKI) and diffusion tensor imaging (DTI) in evaluation of the degree of tubulointerstitial damage and renal function i... Both DKI and DTI were performed in 40 IgAN patients and 17 healthy volunteers. IgAN patients were divided into two groups according to tubulointerstitial lesion score: Mild injury group, n = 24; Moder... Cortical MK, Kr, Da and parenchymal Ka significantly differed among three groups (P < 0.05). Cortical MK, Kr, Ka were negatively correlated with estimated glomerular filtration rate (eGFR) (MK: r = - ... Compared with DTI, DKI was more sensitive and accurate to probe the renal function and the tubulointerstitial damage of IgAN, especially the mild tubulointerstitial damage....

Role of diffusion tensor imaging in neurological prognostication in spinal tuberculosis - A prospective pilot study.

The current study aims to explore the correlation between the Diffusion Tensor Imaging (DTI) indices and neurological status of individuals with TB spine with neurological deficit (TBSND). Further, fa... The current study included 51 individuals with TBSND undergoing posterior instrumentation and posterolateral decompression. All individuals underwent DTI scanning at the site of compression and at a n... The FA values at the compressed segment were significantly lower while the ADC values were significantly higher when compared with the non-compressed levels. Pre-operative motor and total neurological... Higher FA indices along with lower age constitute independent predictors for faster neurological recovery following decompression. FA values correlate with the neurological status of individuals with ...

Diffusion Tensor Imaging in Boys With Adrenoleukodystrophy: Identification of Cerebral Disease and Association With Neurocognitive Outcomes.

Childhood cerebral adrenoleukodystrophy (C-ALD) is a severe inflammatory demyelinating disease that must be treated at an early stage to prevent permanent brain injury and neurocognitive decline. In s... In this retrospective cohort study, we analyzed high-resolution anatomical MRI, DTI, and neurocognitive assessments from boys with C-ALD undergoing HCT at the University of Minnesota between 2011 and ... Among patients with NL-ALD (n = 14), stable or increasing FA, stable AD, and stable or decreasing RD and MD were generally observed during the 1-year study period across all ROIs. In comparison, patie... DTI was sensitive to lesion presence and severity as well as clinical neurocognitive effects of C-ALD. DTI metrics quantify C-ALD even at an early stage....

A systematic review of repeatability and reproducibility studies of diffusion tensor imaging of cervical spinal cord.

Diffusion tensor imaging (DTI) techniques are being studied as a possible diagnostic and predictive tool for the evaluation of cervical spinal cord disease. This systematic review aims to evaluate the... A search in the PubMed, Scopus, Web of Science and Ovid electronic databases was conducted for articles published between January 1990 and February 2022 that related to the repeatability and reproduci... A total of 11 studies were included and assessed for different characteristics, including sample size,(3-34) re-test time interval (<1 h to >3 months), test-retest reproducibility scores and acquisiti... This study revealed that the application of DTI and its related measures in a clinical setting in the assessment of cervical spinal cord changes is feasible and reproducible. However, cervical spinal ... DTI with its parametric maps provide broad evaluation of the tissue structure of axonal white matter and are being studied as a possible diagnostic and predictive tool for the assessment of cervical s...

Reproducibility of automated calculation technique for diffusion tensor image analysis along the perivascular space.

The method of diffusion tensor image analysis along the perivascular space (DTI-ALPS) was gathering attention to evaluate the brain's glymphatic function or interstitial fluid dynamics. However, to th... This study included 23 participants, including 2 with Alzheimer's disease, 15 with mild cognitive impairment, and 6 with cognitive normals. Scan and rescan data of diffusion magnetic resonance images ... The absolute difference in ALPS-index values between scan and rescan was larger in the ALPS index than in the vALPS index by approximately 0.6% as the relative difference. Cohen's d for the left and r... The vALPS index based on DTI-ALPS maintaining tensor vector orientation information has higher reproducibility than the ALPS index. This result encourages a multisite study on the ALPS index with a la...

The comparison of diffusion tensor imaging in human hearts between 1.5 T and 3.0 T.

The aim was to compare the diffusion tensor imaging (DTI) indices derived from human hearts between 1.5 T and 3.0 T scanners. Additionally, the reproducibility of DTI indices was assessed between 1.5 ... A total of 18 ex-vivo hearts were derived from patients who underwent heart transplantation. The DTI schemes were performed at 1.5 T and 3.0 T, respectively. Then, the same slices from each ex-vivo he... No significant differences (all P > 0.05) were found in the DTI indices between 1.5 T and 3.0 T scanners. Interestingly, the ICC of all DTI indices was relatively lower with a low b-value. The reprodu... The DTI indices of ex-vivo human hearts between 1.5 T and 3.0 T scanners had no significant differences. The consistency of DTI indices needed caution using a low b-value with different field strength...

A diffusion tensor imaging study in schizophrenia patients with clozapine induced obsessive compulsive symptoms.

The aim of this study was to evaluate brain connectivity by diffusion tensor imaging (DTI) in schizophrenia patients with clozapine-induced obsessive compulsive symptoms (OCS).... Eighteen schizophrenia patients, nine of which had clozapine-induced OCS (Clz-OCS (+)), 9 without OCS (Clz-OCS (-)) and 9 healthy controls were included. Psychopathology was evaluated with Positive an... Tract-Based Spatial Statistics based comparison of DTI revealed lower fractional anisotropy in the genu of corpus callosum (CC), right cingulum, left frontal white matter (WM) in the Clz-OCS (+) group... WM integrity in several pathways such as cortico-striato-thalamo-cortical circuitry and orbito-frontal tracts seems to be affected differently in patients with Clz-OCS (+). Different neuroplastic effe...

Diffusion tensor imaging studies on subjects with suicidal thoughts and behaviors: A descriptive literature review.

Globally, suicide represents the second leading cause of death in young people aged 15-29 years for both sexes, after traffic accidents. Suicide occurs not only in high-income countries, in high-incom... This review was conducted on studies focused on white matter alterations in people who have attempted or thought about suicide. We searched PubMed and Scopus databases and screened references of inclu... White matter alterations in suicidal behaviors were found in the prefrontal cortex, orbitofrontal cortex, internal capsule, corpus callosum, and default mode networks, which are critical cerebral area... White matter alteration in cerebral areas involving high cognitive process and emotional regulation to confer a heightened vulnerability for suicidal behavior. Suicide is a complex process ranging fro...

Utility of diffusion tensor imaging in differentiating benign from malignant hepatic focal lesions.

To assess the diagnostic accuracy of diffusion tensor imaging (DTI) in the characterization of hepatic focal lesions (HFLs) and compare it to diffusion-weighted imaging (DWI).... Prospective analysis was done for 49 patients (23 male and 26 female) with 74 HFLs who underwent dynamic MRI, DWI, and DTI. Apparent diffusion coefficient (ADC) values from DWI, fractional anisotropy ... The ADC, MD, and FA at cutoff values of ≤ 1.17 × 10... MD and FA of DTI are non-invasive, very good, and excellent discriminators superior to ADC measured by DWI for the differentiation of HFLs.... • The ADC, MD, and FA at cutoff values of ≤ 1.17 × 10...