Titre : Myasthénie congénitale

Myasthénie congénitale : Questions médicales fréquentes

Termes MeSH sélectionnés :

Isometric Contraction
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l'historique familial dans le diagnostic ?\nPeut-on diagnostiquer la myasthénie congénitale à la naissance ?", "url": "https://questionsmedicales.fr/mesh/D020941?mesh_terms=Isometric+Contraction&page=5#section-diagnostic" }, { "@type": "MedicalWebPage", "name": "Symptômes", "headline": "Symptômes sur Myasthénie congénitale", "description": "Quels sont les symptômes principaux de la myasthénie congénitale ?\nLes symptômes peuvent-ils s'aggraver avec l'effort ?\nY a-t-il des symptômes oculaires associés ?\nLes symptômes apparaissent-ils à un âge spécifique ?\nLa myasthénie congénitale affecte-t-elle tous les muscles ?", "url": "https://questionsmedicales.fr/mesh/D020941?mesh_terms=Isometric+Contraction&page=5#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": "Prévention sur Myasthénie congénitale", "description": "Peut-on prévenir la myasthénie congénitale ?\nLes tests génétiques peuvent-ils aider à la prévention ?\nLes conseils génétiques sont-ils recommandés ?\nLes femmes enceintes doivent-elles être surveillées ?\nY a-t-il des mesures préventives pour les nouveau-nés ?", "url": "https://questionsmedicales.fr/mesh/D020941?mesh_terms=Isometric+Contraction&page=5#section-prévention" }, { "@type": "MedicalWebPage", "name": "Traitements", "headline": "Traitements sur Myasthénie congénitale", "description": "Quels traitements sont disponibles pour la myasthénie congénitale ?\nLes médicaments peuvent-ils améliorer les symptômes ?\nLa thérapie physique est-elle recommandée ?\nLa chirurgie est-elle une option de traitement ?\nLes traitements sont-ils adaptés à tous les patients ?", "url": "https://questionsmedicales.fr/mesh/D020941?mesh_terms=Isometric+Contraction&page=5#section-traitements" }, { "@type": "MedicalWebPage", "name": "Complications", "headline": "Complications sur Myasthénie congénitale", "description": "Quelles complications peuvent survenir avec la myasthénie congénitale ?\nLes crises myasthéniques sont-elles graves ?\nComment prévenir les complications respiratoires ?\nLes problèmes de déglutition sont-ils fréquents ?\nLes complications peuvent-elles affecter la qualité de vie ?", "url": "https://questionsmedicales.fr/mesh/D020941?mesh_terms=Isometric+Contraction&page=5#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Myasthénie congénitale", "description": "Quels sont les facteurs de risque de la myasthénie congénitale ?\nLes antécédents familiaux augmentent-ils le risque ?\nLes mutations génétiques sont-elles un facteur déterminant ?\nLes anomalies congénitales sont-elles liées à la maladie ?\nLes facteurs environnementaux jouent-ils un rôle ?", "url": "https://questionsmedicales.fr/mesh/D020941?mesh_terms=Isometric+Contraction&page=5#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment diagnostiquer la myasthénie congénitale ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Le diagnostic repose sur l'examen clinique, des tests électromyographiques et des analyses génétiques." } }, { "@type": "Question", "name": "Quels tests sont utilisés pour confirmer le diagnostic ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Les tests incluent l'électromyographie, le test de stimulation répétée et des tests génétiques." } }, { "@type": "Question", "name": "Les symptômes peuvent-ils varier selon les patients ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la gravité et la nature des symptômes peuvent varier d'un patient à l'autre." } }, { "@type": "Question", "name": "Quel rôle joue l'historique familial dans le diagnostic ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Un historique familial de myasthénie peut orienter le diagnostic vers une forme congénitale." } }, { "@type": "Question", "name": "Peut-on diagnostiquer la myasthénie congénitale à la naissance ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certains cas peuvent être diagnostiqués dès la naissance par des signes cliniques." } }, { "@type": "Question", "name": "Quels sont les symptômes principaux de la myasthénie congénitale ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes incluent une faiblesse musculaire, des difficultés à bouger et une fatigue rapide." } }, { "@type": "Question", "name": "Les symptômes peuvent-ils s'aggraver avec l'effort ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les symptômes tendent à s'aggraver avec l'effort et s'améliorent avec le repos." } }, { "@type": "Question", "name": "Y a-t-il des symptômes oculaires associés ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des symptômes comme le ptosis (chute de la paupière) et la diplopie (vision double) peuvent survenir." } }, { "@type": "Question", "name": "Les symptômes apparaissent-ils à un âge spécifique ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes peuvent apparaître dès la naissance ou se manifester plus tard dans l'enfance." } }, { "@type": "Question", "name": "La myasthénie congénitale affecte-t-elle tous les muscles ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Non, elle affecte principalement les muscles volontaires, en particulier ceux des yeux et des membres." } }, { "@type": "Question", "name": "Peut-on prévenir la myasthénie congénitale ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Étant une maladie génétique, il n'existe pas de méthode de prévention connue." } }, { "@type": "Question", "name": "Les tests génétiques peuvent-ils aider à la prévention ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les tests génétiques peuvent identifier les porteurs et informer les décisions reproductives." } }, { "@type": "Question", "name": "Les conseils génétiques sont-ils recommandés ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les conseils génétiques peuvent aider les familles à comprendre les risques de transmission." } }, { "@type": "Question", "name": "Les femmes enceintes doivent-elles être surveillées ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Oui, une surveillance peut être nécessaire si des antécédents familiaux de myasthénie existent." } }, { "@type": "Question", "name": "Y a-t-il des mesures préventives pour les nouveau-nés ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Les nouveau-nés à risque peuvent nécessiter une surveillance précoce pour détecter des symptômes." } }, { "@type": "Question", "name": "Quels traitements sont disponibles pour la myasthénie congénitale ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent des médicaments, la thérapie physique et parfois la chirurgie." } }, { "@type": "Question", "name": "Les médicaments peuvent-ils améliorer les symptômes ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des médicaments comme les inhibiteurs de la cholinestérase peuvent améliorer la transmission neuromusculaire." } }, { "@type": "Question", "name": "La thérapie physique est-elle recommandée ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la thérapie physique peut aider à maintenir la force musculaire et la fonction." } }, { "@type": "Question", "name": "La chirurgie est-elle une option de traitement ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Dans certains cas, la chirurgie pour retirer le thymus peut être bénéfique." } }, { "@type": "Question", "name": "Les traitements sont-ils adaptés à tous les patients ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements doivent être individualisés en fonction de la gravité et des symptômes du patient." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir avec la myasthénie congénitale ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Les complications incluent des crises myasthéniques, des infections respiratoires et des problèmes de déglutition." } }, { "@type": "Question", "name": "Les crises myasthéniques sont-elles graves ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les crises peuvent entraîner une faiblesse musculaire sévère et nécessiter une intervention médicale urgente." } }, { "@type": "Question", "name": "Comment prévenir les complications respiratoires ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Une surveillance étroite et un traitement précoce des infections peuvent aider à prévenir ces complications." } }, { "@type": "Question", "name": "Les problèmes de déglutition sont-ils fréquents ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les problèmes de déglutition peuvent survenir et nécessiter une évaluation par un spécialiste." } }, { "@type": "Question", "name": "Les complications peuvent-elles affecter la qualité de vie ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les complications peuvent significativement impacter la qualité de vie des patients." } }, { "@type": "Question", "name": "Quels sont les facteurs de risque de la myasthénie congénitale ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Les facteurs incluent des antécédents familiaux, des mutations génétiques et des anomalies congénitales." } }, { "@type": "Question", "name": "Les antécédents familiaux augmentent-ils le risque ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, un historique familial de myasthénie congénitale augmente le risque de développer la maladie." } }, { "@type": "Question", "name": "Les mutations génétiques sont-elles un facteur déterminant ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des mutations dans des gènes spécifiques sont souvent responsables de la myasthénie congénitale." } }, { "@type": "Question", "name": "Les anomalies congénitales sont-elles liées à la maladie ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Certaines anomalies congénitales peuvent être associées à un risque accru de myasthénie congénitale." } }, { "@type": "Question", "name": "Les facteurs environnementaux jouent-ils un rôle ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Actuellement, les facteurs environnementaux ne sont pas considérés comme des contributeurs significatifs." } } ] } ] }

Sources (2006 au total)

Effect of an Isometric or Eccentric Hip Extension Exercise Intervention on Hamstring Strength, Architecture, and Morphology.

This study aimed to investigate hamstring architectural, strength, and morphological adaptations after an eccentric or isometric hip extension exercise intervention.... Twenty-four recreationally active males performed either an eccentric ( n = 12) or an isometric hip extension ( n = 12) exercise intervention, twice per week for 6 wk, followed by a 4-wk detraining pe... The eccentric hip extension exercise intervention significantly lengthened BFlh fascicles (+19.7%, P < 0.001, d = 1.57), increased eccentric knee flexion torque (ECC 60°·s -1 , +12%, P < 0.005, d = 0.... The eccentric but not isometric hip extension exercise intervention significantly increased BFlh fascicle length. Both exercise interventions demonstrated contraction mode-specific increases in streng...

Motor unit recruitment and firing rate at low force of contraction.

A prevailing concept of motor unit (MU) recruitment used for calculating recruitment ratio (RR) suggests a progressive linear increase in firing rate (FR). The objective of this study is to assess its... Concentric needle electromyography (EMG) recordings were made in normal muscle and abnormal muscle of patients with neurogenic findings. Signals recorded at low force were visually decomposed to study... We observed one to six MUs discharging at a rate < 15 Hz in normal muscles at low force. The MU FR was 5-8 Hz at onset. With increasing force, FR increased by 3-5 Hz and then idled at <15 Hz while oth... Our data are consistent with FR analysis results described by other investigators. It does not support a progressive linear increase in MU FR with recruitment. A revised model for MU recruitment at lo...

Intra-session reliability of isometric muscle strength of the bilateral standing press in female handball players.

Systematizing reliable protocols and procedures for strength assessment in handball has allowed for a more thorough kinetic analysis and increased precision in detecting training-induced changes in mu... The aim of this study was to analyze the relative and absolute reliability of intra-session comparisons in an isometric peak muscle strength protocol in a bilateral standing press (BSP) exercise among... Sixteen young female handball players at an international level, aged between 22 ± 4 years, with no prior experience in using functional electromechanical dynamometers (FEMD) participated in this stud... The results demonstrated high relative reliability (ICC 0.93-0.97) and absolute reliability (SEM 0.19-2.79) y (CV 4.78-9.03) for both mean force and peak force, with no significant differences between... The mean and peak isometric muscle strength for the BSP exercise controlled with FEMD in female handball players exhibits high relative and absolute reliability between series....

Reliability, Familiarization Effect, and Comparisons Between a Predetermined and a Self-Determined Isometric-Squat Testing Protocol.

This study examined the interday reliability of a predetermined and a self-determined isometric-squat test among youth soccer players. Familiarization effects were evaluated to determine the minimum n... Thirty-one youth soccer players (mean [SD] age: 13.2 [1.0] y; body mass: 54.1 [3.4] kg; stature: 166.3 [11.2] cm; percentage of estimated adult height: 92.6% [3.6%]) from a top-tier professional acade... Both protocols displayed acceptable (intraclass correlation coefficient ≥.75 and coefficient of variation ≤10%) reliability statistics for all metrics apart from rate of force development of any time ... The isometric-squat test is a reliable test among youth soccer players. Two familiarization sessions seem to be sufficient to ensure data stabilization. Outputs between the self-determined and predete...

No effect of coactivation on fatigue-induced decreases in isokinetic and isometric torque in healthy young male adults.

Antagonist activation may contribute to fatigue-induced decreases in torque while assisting in the maintenance of joint stability. This study utilized a reciprocal, slow velocity (60°·s... Twelve recreationally active men (mean ± SD: age = 21.7 ± 1.6 years; body mass = 83.5 ± 8.8 kg; height = 179.4 ± 5.2 cm) completed isokinetic (60 and 180°·s... The torque analyses indicated greater (p < 0.03) decreases for 180°·s... There was velocity- and movement-specific fatigability for forearm flexion and extension. The parallel, fatigue-induced EMG AMP responses indicated that coactivation did not contribute to the decrease...