Skip to main content

01.12.2017 | Research | Ausgabe 1/2017 Open Access

Journal of Neurodevelopmental Disorders 1/2017

A resting EEG study of neocortical hyperexcitability and altered functional connectivity in fragile X syndrome

Journal of Neurodevelopmental Disorders > Ausgabe 1/2017
Jun Wang, Lauren E. Ethridge, Matthew W. Mosconi, Stormi P. White, Devin K. Binder, Ernest V. Pedapati, Craig A. Erickson, Matthew J. Byerly, John A. Sweeney
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s11689-017-9191-z) contains supplementary material, which is available to authorized users.



Cortical hyperexcitability due to abnormal fast-spiking inhibitory interneuron function has been documented in fmr1 KO mice, a mouse model of the fragile X syndrome which is the most common single gene cause of autism and intellectual disability.


We collected resting state dense-array electroencephalography data from 21 fragile X syndrome (FXS) patients and 21 age-matched healthy participants.


FXS patients exhibited greater gamma frequency band power, which was correlated with social and sensory processing difficulties. Second, FXS patients showed increased spatial spreading of phase-synchronized high frequency neural activity in the gamma band. Third, we observed increased negative theta-to-gamma but decreased alpha-to-gamma band amplitude coupling, and the level of increased theta power was inversely related to the level of resting gamma power in FXS.


Increased theta band power and coupling from frontal sources may represent a mechanism providing compensatory inhibition of high-frequency gamma band activity, potentially contributing to the widely varying level of neurophysiological and behavioral abnormalities and treatment response seen in full-mutation FXS patients. These findings extend preclinical observations and provide new mechanistic insights into brain alterations and their variability across FXS patients. Electrophysiological measures may provide useful translational biomarkers for advancing drug development and individualizing treatments for neurodevelopmental disorders with associated neuronal hyperexcitability.
Über diesen Artikel

Weitere Artikel der Ausgabe 1/2017

Journal of Neurodevelopmental Disorders 1/2017 Zur Ausgabe

Neu im Fachgebiet Psychiatrie

Meistgelesene Bücher aus dem Fachgebiet

2017 | Buch

Pocket Guide Psychopharmaka von A bis Z

Im Pocket Guide finden Sie von A bis Z schnell und übersichtlich die "Erste-Hilfe"-Information rund um alle Psychopharmaka, die Sie auf Station und im Praxisalltag brauchen. Das Pocket-Buch passt bestens in die Kitteltasche. Auf eine ausführliche Darstellung der Störungen wurde bewusst verzichtet.

Prof. Dr. med. Otto Benkert, Prof. Dr. med. I.-G. Anghelescu, Prof. Dr. med. G. Gründer, Prof. Dr. med. P. Heiser, Prof. Dr. rer. Nat. C. Hiemke, Prof. Dr. med. H. Himmerich, Prof. Dr. med. F. Kiefer, Prof. Dr. med. C. Lange-Asschenfeldt, Prof. Dr. med., Dr. rer. nat., Dipl.-Psych. M.J. Müller, Dr. med., Dipl.-Kfm. M. Paulzen, Dr. med. F. Regen, Prof. Dr. med. A. Steiger, Prof. Dr. med. F. Weber

2016 | Buch

Klinikmanual Psychiatrie, Psychosomatik und Psychotherapie

Dieses Kitteltaschenbuch enthält übersichtlich und systematisch alle notwendigen Informationen zum schnellen Nachschlagen auf Station, in der Ambulanz oder im Konsildienst: Klare Handlungsanweisungen, Therapieempfehlungen und die notwendigen rechtlichen Hintergründe.

Prof. Dr. Dr. Frank Schneider