Titre : Perception visuelle

Perception visuelle : Questions médicales fréquentes

Termes MeSH sélectionnés :

Nerve Net
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"Symptômes sur Perception visuelle", "description": "Quels symptômes de troubles de la perception ?\nComment reconnaître une illusion visuelle ?\nQu'est-ce que l'agnosie visuelle ?\nQuels signes d'une fatigue visuelle ?\nComment se manifeste la synesthésie visuelle ?", "url": "https://questionsmedicales.fr/mesh/D014796?mesh_terms=Nerve+Net&page=1000#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": "Prévention sur Perception visuelle", "description": "Comment prévenir les troubles de la perception ?\nQuel rôle joue l'alimentation sur la vision ?\nComment réduire la fatigue visuelle ?\nPourquoi éviter le tabac pour la vision ?\nL'exercice physique aide-t-il la vision ?", "url": "https://questionsmedicales.fr/mesh/D014796?mesh_terms=Nerve+Net&page=1000#section-prévention" }, { "@type": "MedicalWebPage", "name": "Traitements", "headline": "Traitements sur Perception visuelle", "description": "Quels traitements pour troubles de la perception ?\nComment la thérapie visuelle aide-t-elle ?\nLes lunettes corrigent-elles la perception ?\nQuand envisager une chirurgie oculaire ?\nQuels médicaments pour troubles visuels ?", "url": "https://questionsmedicales.fr/mesh/D014796?mesh_terms=Nerve+Net&page=1000#section-traitements" }, { "@type": "MedicalWebPage", "name": "Complications", "headline": "Complications sur Perception visuelle", "description": "Quelles complications des troubles visuels ?\nComment les troubles visuels affectent-ils la vie quotidienne ?\nQuels risques de dépression avec troubles visuels ?\nLes troubles de la perception peuvent-ils s'aggraver ?\nQuelles sont les conséquences d'une agnosie visuelle ?", "url": "https://questionsmedicales.fr/mesh/D014796?mesh_terms=Nerve+Net&page=1000#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Perception visuelle", "description": "Quels facteurs de risque pour troubles visuels ?\nLe diabète augmente-t-il les risques visuels ?\nComment l'hypertension affecte-t-elle la vision ?\nLe stress influence-t-il la perception visuelle ?\nLes antécédents de traumatismes oculaires sont-ils un risque ?", "url": "https://questionsmedicales.fr/mesh/D014796?mesh_terms=Nerve+Net&page=1000#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment évaluer la perception visuelle ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Des tests de vision, comme l'optométrie, évaluent la perception visuelle." } }, { "@type": "Question", "name": "Quels examens pour troubles de la perception ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "L'IRM et l'électrorétinogramme aident à diagnostiquer les troubles de la perception." } }, { "@type": "Question", "name": "Quels signes indiquent un problème visuel ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Des difficultés à voir, des illusions ou des distorsions visuelles peuvent indiquer un problème." } }, { "@type": "Question", "name": "Quand consulter un spécialiste de la vue ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Consultez un ophtalmologiste si vous ressentez des changements soudains de vision." } }, { "@type": "Question", "name": "Quelles sont les causes de troubles visuels ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Les causes incluent les maladies oculaires, les traumatismes et les troubles neurologiques." } }, { "@type": "Question", "name": "Quels symptômes de troubles de la perception ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes incluent la vision floue, les halos, et les difficultés de profondeur." } }, { "@type": "Question", "name": "Comment reconnaître une illusion visuelle ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Les illusions visuelles se manifestent par des perceptions erronées d'objets ou de couleurs." } }, { "@type": "Question", "name": "Qu'est-ce que l'agnosie visuelle ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "L'agnosie visuelle est l'incapacité de reconnaître des objets malgré une vision intacte." } }, { "@type": "Question", "name": "Quels signes d'une fatigue visuelle ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Les signes incluent des maux de tête, des yeux secs et une vision floue après un usage prolongé." } }, { "@type": "Question", "name": "Comment se manifeste la synesthésie visuelle ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "La synesthésie visuelle se manifeste par des associations involontaires entre couleurs et sons." } }, { "@type": "Question", "name": "Comment prévenir les troubles de la perception ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Protégez vos yeux avec des lunettes de soleil et faites des examens réguliers." } }, { "@type": "Question", "name": "Quel rôle joue l'alimentation sur la vision ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Une alimentation riche en vitamines A, C et E peut aider à maintenir une bonne vision." } }, { "@type": "Question", "name": "Comment réduire la fatigue visuelle ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Faites des pauses régulières lors de l'utilisation d'écrans pour réduire la fatigue visuelle." } }, { "@type": "Question", "name": "Pourquoi éviter le tabac pour la vision ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Le tabac augmente le risque de maladies oculaires comme la dégénérescence maculaire." } }, { "@type": "Question", "name": "L'exercice physique aide-t-il la vision ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'exercice régulier améliore la circulation sanguine, bénéfique pour la santé oculaire." } }, { "@type": "Question", "name": "Quels traitements pour troubles de la perception ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent la thérapie visuelle, les lunettes et parfois la chirurgie." } }, { "@type": "Question", "name": "Comment la thérapie visuelle aide-t-elle ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "La thérapie visuelle améliore la coordination œil-main et la perception visuelle." } }, { "@type": "Question", "name": "Les lunettes corrigent-elles la perception ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les lunettes corrigent les erreurs de réfraction et améliorent la perception visuelle." } }, { "@type": "Question", "name": "Quand envisager une chirurgie oculaire ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "La chirurgie est envisagée pour des problèmes structurels comme la cataracte ou le glaucome." } }, { "@type": "Question", "name": "Quels médicaments pour troubles visuels ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Des médicaments peuvent traiter des conditions comme le glaucome ou les infections oculaires." } }, { "@type": "Question", "name": "Quelles complications des troubles visuels ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Les complications incluent la perte de vision, l'isolement social et des troubles émotionnels." } }, { "@type": "Question", "name": "Comment les troubles visuels affectent-ils la vie quotidienne ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Ils peuvent limiter les activités quotidiennes, affecter le travail et la mobilité." } }, { "@type": "Question", "name": "Quels risques de dépression avec troubles visuels ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Les troubles visuels augmentent le risque de dépression en raison de l'isolement social." } }, { "@type": "Question", "name": "Les troubles de la perception peuvent-ils s'aggraver ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, sans traitement, certains troubles de la perception peuvent s'aggraver avec le temps." } }, { "@type": "Question", "name": "Quelles sont les conséquences d'une agnosie visuelle ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "L'agnosie visuelle peut entraîner des difficultés dans la reconnaissance d'objets et des interactions sociales." } }, { "@type": "Question", "name": "Quels facteurs de risque pour troubles visuels ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Les facteurs incluent l'âge, les antécédents familiaux et les maladies chroniques." } }, { "@type": "Question", "name": "Le diabète augmente-t-il les risques visuels ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le diabète peut causer des complications oculaires comme la rétinopathie diabétique." } }, { "@type": "Question", "name": "Comment l'hypertension affecte-t-elle la vision ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "L'hypertension peut endommager les vaisseaux sanguins de l'œil, entraînant des troubles visuels." } }, { "@type": "Question", "name": "Le stress influence-t-il la perception visuelle ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le stress peut affecter la concentration et la clarté de la perception visuelle." } }, { "@type": "Question", "name": "Les antécédents de traumatismes oculaires sont-ils un risque ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les traumatismes oculaires augmentent le risque de troubles de la perception visuelle." } } ] } ] }

Sources (10000 au total)

Differing Associations between Optic Nerve Head Strains and Visual Field Loss in Patients with Normal- and High-Tension Glaucoma.

To study the associations between optic nerve head (ONH) strains under intraocular pressure (IOP) elevation with retinal sensitivity in patients with glaucoma.... Clinic-based cross-sectional study.... Two hundred twenty-nine patients with primary open-angle glaucoma (subdivided into 115 patients with high-tension glaucoma [HTG] and 114 patients with normal-tension glaucoma [NTG]).... For 1 eye of each patient, we imaged the ONH using spectral-domain OCT under the following conditions: (1) primary gaze and (2) primary gaze with acute IOP elevation (to approximately 35 mmHg) achieve... Associations between ONH strains and values of retinal sensitivity from visual field testing.... For patients with HTG, we found (1) significant negative linear associations between ONH strains and retinal sensitivity (P < 0.001; on average, a 1% increase in ONH strains corresponded to a decrease... We found significant negative associations between IOP-induced ONH strains and retinal sensitivity in a relatively large glaucoma cohort. Specifically, patients with HTG who experienced higher ONH str...

Estimation of the minimum effective volume of 0.5% bupivacaine for ultrasound-guided popliteal sciatic nerve block in diabetic patients with neuropathy.

The safety of conventional regional nerve block techniques in patients with established neuropathies, such as diabetic peripheral neuropathy (DPN), is still unclear. We designed this prospective dose ... Fifty-three patients with diabetic peripheral neuropathy and scheduled for below knee surgical procedure received popliteal sciatic nerve block under ultrasound guidance. The initial local anaesthetic... The study included 53 patients to obtain 45 successful blocks. The MELAV90 of 0.5% bupivacaine was obtained at 5.85 ml (95% confidence interval, 5.72 to 6.22 ml). Eight patients needed supplemental an... For patients with diabetic peripheral neuropathy undergoing below-knee surgery, the MELAV90 of 0.5% bupivacaine for subparaneural popliteal sciatic nerve to achieve surgical anaesthesia was 5.85 ml....

Retinal and optic nerve magnetic resonance diffusion-weighted imaging in acute non-arteritic central retinal artery occlusion.

Diffusion weighted imaging hyperintensity (DWI-H) has been described in the retina and optic nerve during acute central retinal artery occlusion (CRAO). We aimed to determine whether DWI-H can be accu... Retrospective cross-sectional study that included all consecutive adult patients with confirmed acute non-arteritic CRAO and brain MRI performed within 14 days of CRAO. At each center, two neuroradiol... We included 204 patients [mean age 67.9±14.6 years; 47.5% females; median time from CRAO to MRI 1 day (IQR 1-4.3); 1.5 T in 127/204 (62.3%) and 3.0 T in 77/204 (37.7%)]. Inter-rater reliability varied... In this real-world case series, differences in agreement and interpretation accuracy among neuroradiologists limited the role of DWI-H in diagnosing acute CRAO on standard MRI. DWI-H was identified in...

Intraoperative neuromonitoring of the recurrent laryngeal nerve is indispensable during complete endoscopic radical resection of thyroid cancer: A retrospective study.

Complete endoscopic radical resection of thyroid cancer, especially through the areolar approach, can achieve curative and acceptable cosmetic effects in patients with differentiated thyroid carcinoma... A total of 106 patients with differentiated thyroid carcinoma were enrolled in the study between February 2013 and April 2018. Based on the use of the IONM technique, all patients were divided into th... Compared to the non-IONM group, the IONM group required less time for RLN identification (3.05 ± 1.58 vs. 9.36 ± 4.82 min,... IONM significantly improved RLN identification and reduced transient RLN injuries during complete endoscopic radical resection.... 3b....

Efficacy of Tibial Nerve Stimulation on Fecal Incontinence in Patients With Low Anterior Resection Syndrome Following Surgery for Colorectal Cancer.

To systematically review the available literature on the efficacy of tibial nerve stimulation on faecal incontinence and quality of life in adult patients with low anterior resection syndrome followin... A primary search of electronic databases was conducted adopting a combination of search terms related to the following areas of interest: "efficacy", "tibial nerve stimulation" and "low anterior resec... Five distinct studies involving 116 patients met the inclusion criteria for the review. The included studies suggest that tibial nerve stimulation may have a positive effect on faecal incontinence and... There were a limited number of studies and a great degree of heterogeneity of evidence due to differences in participants' baseline characteristics, dropout rates, and follow-up periods. Further resea...

Scapular winging due to rhomboid muscle paralysis: clinical assessment of 4 cases and anatomic study of the dorsal scapular nerve.

A rare cause of scapular winging is rhomboid muscle paralysis secondary to dorsal scapular nerve (DSN) neuropathy. This paralysis causes winging of the medial border of the scapula with lateral rotati... A continuous clinical series of 4 patients with isolated rhomboid muscle deficiency was analyzed. Two patients were men and 2 were women, with a mean age of 40 years (range, 33-51 years). Three patien... The 4 patients presented with isolated DSN neuropathy were confirmed by electroneuromyographic testing. Total correction of scapular winging was not obtained in any patient. Three patients experienced... DSN compression is conventionally attributed to the middle scalene muscle, but it is noteworthy that our study reveals the possibility of dynamic compression of the nerve by the proximal part of the m... Our study reveals the possibility of dynamic compression of the DSN by the proximal part of the medial border of the scapula, which occurs when the arm is raised above 90°. In the absence of a surgica...

Clinical characteristics and genetic testing outcome of suspected hereditary peripheral nerve sheath tumours in a tertiary cancer institution in Singapore.

Peripheral Nerve Sheath Tumors (PNST) are a diverse group of mostly benign tumours uncommon in the general population. About 5-10% of PNSTs are hereditary, predominantly arising from germline variants... We reviewed the clinical characteristics and genetic testing results of patients referred to the NCIS Adult Cancer Genetics Clinic for suspected hereditary PNST.... 3,001 patients suspected to have various hereditary cancer syndromes were evaluated between year 2000 to March 2021. 13 (0.4%) were clinically diagnosed to have hereditary PNSTs. The majority were mal... Hereditary PNSTs are rare referrals to an adult cancer genetics clinic. NF1 is the most common PNST seen. LZTR1 variants may be the underlying cause in Asian patients with multiple schwannomatosis....

Visualizing Anatomic Variants of the Sciatic Nerve Using Diagnostic Ultrasound During Piriformis Muscle Injection: An Example of 4 Cases.

The aim of this article is to present examples of patients in whom piriformis muscle (PM) and sciatic nerve (SN) variations were detected by a diagnostic ultrasound (US)-guided examination and were su... This series includes 4 cases. In case 1, a 30-year-old woman with a 7 numeric rating scale (NRS) score for pain (on a 0-10 scale) was evaluated for complaints of left gluteal pain radiating to the thi... Diagnostic US evaluation of the gluteal region for each patient revealed anatomical variations of the SN. In 3 of the cases, corresponding contralateral US images demonstrated similar anatomic variati... The anatomical variations of the SN and PM might be a facilitating factor for myofascial pain syndrome in PS. These cases demonstrate that SN variations could be visualized with the help of diagnostic...