2014
DOI: 10.1093/brain/awu175
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Motor co-activation in siblings of patients with juvenile myoclonic epilepsy: an imaging endophenotype?

Abstract: In juvenile myoclonic epilepsy (JME), myoclonic jerks are often triggered by cognitive effort. Wandschneider et al. report co-activation of the motor and prefrontal cognitive networks in unaffected siblings, similar to that previously reported in patients themselves. This co-activation could constitute a heritable marker for further genetic studies of JME.

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Cited by 61 publications
(52 citation statements)
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References 49 publications
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“…We found, exclusively in the lowalpha 6-9-Hz range, that clustering coefficient and the variance of mean degree differed between GGE patients and healthy controls, and also differed between relatives of GGE patients and healthy controls. 5 Our study here extends these findings to show that excessive synchrony within the sensorimotor network itself is observable at rest. In subsequent theoretical work, we showed that the connectivity features of these networks specifically predispose them to ictal onset.…”
Section: Network Connectivity In Relatives Of Patients With Gge: Ensupporting
confidence: 80%
“…We found, exclusively in the lowalpha 6-9-Hz range, that clustering coefficient and the variance of mean degree differed between GGE patients and healthy controls, and also differed between relatives of GGE patients and healthy controls. 5 Our study here extends these findings to show that excessive synchrony within the sensorimotor network itself is observable at rest. In subsequent theoretical work, we showed that the connectivity features of these networks specifically predispose them to ictal onset.…”
Section: Network Connectivity In Relatives Of Patients With Gge: Ensupporting
confidence: 80%
“…The task applied is reminiscent of some of the neuropsychological tasks that can evoke seizures in PI, and it would have been interesting to know if the observed effects differed quantitatively in patients with PI and those without PI. Wandschneider et al [33] recently showed similar findings in a group of 15 unaffected siblings of patients with JME. This probably indicates that hyperconnectivity directly expresses a potentially ictogenic genotype that some of these subjects have inherited.…”
Section: Advanced Investigationssupporting
confidence: 58%
“…Diese Befunde bieten eine Erklärung für die typische Anfallstriggerung durch Praxisinduktion bei der JME. Ähnliche Befunde bei gesunden Geschwistern sprechen dafür, dass dieses fMRT-Merkmal erblich ist und somit als Endophä-notyp dienen kann ( [17,19], L links, R rechts) …”
Section: Zeitschrift Für Epileptologie 2 · 2018 145unclassified
“…"Endophäno-typen" dienen. Dabei geht man davon aus, dass bestimmte erbliche MRT-Merkmale von jeweils nur wenigen Geneffekten beeinflusst werden, die auch bei nicht erkrankten Verwandten nachgewiesen werden können [19] und deswegenunabhängig von Medikamenteneffekten oder chronischer Krankheitsaktivität -auch weniger heterogen sind als der vollständige Krankheitsphänotyp [3,6]. Solche bildgebend definierten Endophänotypen können in Zukunft helfen, komplexe polygenetische Erkrankungen wie die JME in verschiedene Komponenten aufzuteilen, die ein Verständnis der zugrunde liegenden Mechanismen ermöglicht.…”
Section: Introductionunclassified