Does sleep deprivation alter functional EEG networks in children with focal epilepsy?

被引:16
作者
van Diessen, Eric [1 ]
Otte, Willem M. [1 ,2 ]
Braun, Kees P. J. [1 ]
Staim, Cornelis J. [3 ]
Jansen, Floor E. [1 ]
机构
[1] Univ Med Ctr Utrecht, Brain Ctr Rudolf Magnus, Dept Pediat Neurol, Utrecht, Netherlands
[2] Univ Med Ctr Utrecht, Image Sci Inst, Biomed MR Imaging & Spect Grp, Utrecht, Netherlands
[3] Vrije Univ Amsterdam Med Ctr, Dept Clin Neurophysiol, Amsterdam, Netherlands
关键词
epilepsy; EEG; sleep deprivation; network analysis; graph theory; minimum spanning tree;
D O I
10.3389/fnsys.2014.00067
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Electroencephalography (EEG) recordings after sleep deprivation increase the diagnostic yield in patients suspected of epilepsy if the routine EEG remains inconclusive. Sleep deprivation is associated with increased interictal EEG abnormalities in patients with epilepsy, but the exact mechanism is unknown. In this feasibility study, we used a network analytical approach to provide novel insights into this clinical observation. The aim was to characterize the effect of sleep deprivation on the interictal functional network organization using a unique dataset of paired routine and sleep deprivation recordings in patients and controls. We included 21 children referred to the first seizure clinic of our center with suspected new onset focal epilepsy in whom a routine interictal and a sleep deprivation EEG (SD-EEG) were performed. Seventeen children, in whom the diagnosis of epilepsy was excluded, served as controls. For both time points weighted functional networks were constructed based on interictal artifact free time-series. Routine and sleep deprivation networks were characterized at different frequency bands using minimum spanning tree (MST) measures (leaf number and diameter) and classical measures of integration (path length) and segregation (clustering coefficient). A significant interaction was found for leaf number and diameter between patients and controls after sleep deprivation: patients showed a shift toward a more path-like MST network whereas controls showed a shift toward a more star-like MST network. This shift in network organization after sleep deprivation in patients is in accordance with previous studies showing a more regular network organization in the ictal state and might relate to the increased epileptiform abnormalities found in patients after sleep deprivation. Larger studies are needed to verify these results. Finally, MST measures were more sensitive in detecting network changes as compared to the classical measures of integration and segregation.
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页数:11
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