de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Peri-ictal network dynamics of spike-wave discharges: Phase and spectral characteristics

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons71789

Schoffelen,  Jan-Mathijs
Donders Institute for Brain, Cognition and Behaviour, External Organizations;
Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society;

Locator
There are no locators available
Fulltext (public)

Luttjohann_J_Exp_Neurol_2012.pdf
(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Lüttjohann, A., Schoffelen, J.-M., & Van Luijtelaar, G. (2013). Peri-ictal network dynamics of spike-wave discharges: Phase and spectral characteristics. Experimental Neurology, 239, 235-247. doi:10.1016/j.expneurol.2012.10.021.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-1A08-2
Abstract
Purpose The brain is a highly interconnected neuronal assembly in which network analyses can greatly enlarge our knowledge on seizure generation. The cortico-thalamo-cortical network is the brain-network of interest in absence epilepsy. Here, network synchronization is assessed in a genetic absence model during 5 second long pre-ictal- > ictal transition periods. Method 16 male WAG/Rij rats were equipped with multiple electrodes targeting layer 4 to 6 of the somatosensory-cortex, rostral and caudal RTN, VPM, anterior-(ATN) and posterior (Po) thalamic nucleus. Local Field Potentials measured during pre-ictal- > ictal transition and during control periods were subjected to time-frequency and pairwise phase consistency analysis. Results Pre-ictally, all channels showed Spike-Wave Discharge (SWD) precursor activity (increases in spectral power), which were earliest and most pronounced in the somatosensory cortex. The caudal RTN decoupled from VPM, Po and cortical layer 4. Strong increases in synchrony were found between cortex and thalamus during SWD. Although increases between cortex and VPM were seen in SWD frequencies and its harmonics, boarder spectral increases (6-48 Hz) were seen between cortex and Po. All thalamic nuclei showed increased phase synchronization with Po but not with VPM. Conclusion Absence seizures are not sudden and unpredictable phenomena: the somatosensory cortex shows highest and earliest precursor activity. The pre-ictal decoupling of the caudal RTN might be a prerequisite of SWD generation. Po nucleus might be the primary thalamic counterpart to the somatosensory-cortex in the generation of the cortico-thalamic-cortical oscillations referred to as SWD.