TY  - CHAP
A1  - Lehnertz, Klaus
A1  - Bialonski, Stephan
A1  - Horstmann, Marie-Therese
A1  - Krug, Dieter
A1  - Rothkegel, Alexander
A1  - Staniek, Matthäus
A1  - Wagner, Tobias
T1  - Epilepsy
T2  - Reviews of Nonlinear Dynamics and Complexity, Volume 2
Y1  - 2010
SN  - 9783527628001
U6  - http://dx.doi.org/10.1002/9783527628001.ch5
SP  - 159
EP  - 200
PB  - Wiley-VCH
ER  - 
TY  - JOUR
A1  - Lehnertz, Klaus
A1  - Bialonski, Stephan
A1  - Horstmann, Marie-Therese
A1  - Krug, Dieter
A1  - Rothkegel, Alexander
A1  - Staniek, Matthäus
A1  - Wagner, Tobias
T1  - Synchronization phenomena in human epileptic brain networks
JF  - Journal of neuroscience methods
Y1  - 2009
U6  - http://dx.doi.org/10.1016/j.jneumeth.2009.05.015
SN  - 0165-0270
VL  - 183
IS  - 1
SP  - 42
EP  - 48
ER  - 
TY  - JOUR
A1  - Schindler, Kaspar A.
A1  - Bialonski, Stephan
A1  - Horstmann, Marie-Therese
A1  - Elger, Christian E.
A1  - Lehnertz, Klaus
T1  - Evolving functional network properties and synchronizability during human epileptic seizures
JF  - Chaos: An Interdisciplinary Journal of Nonlinear Science
Y1  - 2008
U6  - http://dx.doi.org/10.1063/1.2966112
SN  - 1089-7682
VL  - 18
IS  - 3
SP  - 033119
ER  - 
TY  - JOUR
A1  - Horstmann, Marie-Therese
A1  - Bialonski, Stephan
A1  - Noenning, Nina
A1  - Mai, Heinke
A1  - Prusseit, Jens
A1  - Wellmer, Jörg
A1  - Hinrichs, Hermann
A1  - Lehnertz, Klaus
T1  - State dependent properties of epileptic brain networks: Comparative graph–theoretical analyses of simultaneously recorded EEG and MEG
JF  - Clinical Neurophysiology
N2  - Objective
To investigate whether functional brain networks of epilepsy patients treated with antiepileptic medication differ from networks of healthy controls even during the seizure-free interval.

Methods
We applied different rules to construct binary and weighted networks from EEG and MEG data recorded under a resting-state eyes-open and eyes-closed condition from 21 epilepsy patients and 23 healthy controls. The average shortest path length and the clustering coefficient served as global statistical network characteristics.

Results
Independent on the behavioral condition, epileptic brains exhibited a more regular functional network structure. Similarly, the eyes-closed condition was characterized by a more regular functional network structure in both groups. The amount of network reorganization due to behavioral state changes was similar in both groups. Consistent findings could be achieved for networks derived from EEG but hardly from MEG recordings, and network construction rules had a rather strong impact on our findings.

Conclusions
Despite the locality of the investigated processes epileptic brain networks differ in their global characteristics from non-epileptic brain networks. Further methodological developments are necessary to improve the characterization of disturbed and normal functional networks.

Significance
An increased regularity and a diminished modulation capability appear characteristic of epileptic brain networks.
Y1  - 2010
U6  - http://dx.doi.org/10.1016/j.clinph.2009.10.013
SN  - 1388-2457
VL  - 121
IS  - 2
SP  - 172
EP  - 185
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bialonski, Stephan
A1  - Horstmann, Marie-Therese
A1  - Lehnertz, Klaus
T1  - From brain to earth and climate systems: Small-world interaction networks or not?
JF  - Chaos: An Interdisciplinary Journal of Nonlinear Science
N2  - We consider recent reports on small-world topologies of interaction networks derived from the dynamics of spatially extended systems that are investigated in diverse scientific fields such as neurosciences, geophysics, or meteorology. With numerical simulations that mimic typical experimental situations, we have identified an important constraint when characterizing such networks: indications of a small-world topology can be expected solely due to the spatial sampling of the system along with the commonly used time series analysis based approaches to network characterization.
Y1  - 2010
U6  - http://dx.doi.org/10.1063/1.3360561
SN  - 1089-7682
VL  - 20
IS  - 1
PB  - AIP Publishing
CY  - Melville, NY
ER  -