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Published on: December 18, 2016
Functional Connectivity in Self-limited Epilepsy with Centrotemporal Spikes (SeLECTS) Increases with Epilepsy
Insights
In children with Self-Limited Epilepsy with Centrotemporal Spikes (SeLECTS), epilepsy duration and spike activity progressively increase functional connectivity. Targeting spikes may prevent brain network disruption.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Epilepsy Research
Background:
- Self-Limited Epilepsy with Centrotemporal Spikes (SeLECTS) is a common childhood epilepsy syndrome.
- Understanding the impact of epilepsy duration and interictal spikes on brain networks is crucial for SeLECTS management.
- Functional connectivity alterations may underlie cognitive and developmental outcomes in pediatric epilepsy.
Purpose of the Study:
- To investigate the relationship between epilepsy duration and functional brain connectivity in children with SeLECTS.
- To determine the influence of interictal spike persistence on functional connectivity changes over time.
- To assess progressive neural network alterations in SeLECTS during sleep.
Main Methods:
- Electroencephalograms (EEGs) from 68 children with SeLECTS and 65 controls were analyzed.
- Functional connectivity was quantified using the weighted phase lag index during sleep.
- Longitudinal analysis compared connectivity in patients with persistent versus resolved interictal spikes.
Main Results:
- Functional connectivity was significantly higher in children with longer epilepsy duration compared to controls and those with shorter duration.
- Connectivity changes were initially localized to the right occipital region and became more widespread with increased epilepsy duration.
- Persistent interictal spikes correlated with increasing functional connectivity, while spike resolution was associated with decreasing connectivity.
Conclusions:
- Functional connectivity in SeLECTS increases progressively with epilepsy duration and cumulative spike exposure.
- Ongoing interictal spikes appear to drive alterations in neural network organization.
- Interictal spikes represent a potential therapeutic target to mitigate progressive brain network disruption and preserve cognitive function.
Objective:
To determine the impact of epilepsy duration and interictal spikes on functional connectivity in children with Self-Limited Epilepsy with Centrotemporal Spikes (SeLECTS).
Methods:
Connectivity was calculated from electroencephalograms (EEGs) of 68 children with SeLECTS and 65 age and sex-matched controls using the weighted phase lag index. SeLECTS EEGs were categorized by epilepsy duration (shorter or longer than 6 months) to assess progressive connectivity changes. To investigate the impact of spikes on connectivity, 19 SeLECTS patients who underwent two EEGs were analyzed longitudinally, comparing those whose spikes persisted versus resolved over time. Analyses focused on connectivity during sleep.
Results:
Connectivity increased with epilepsy duration, being lowest in controls, intermediate in patients with shorter epilepsy duration, and highest in those with longer duration. Changes were initially greatest within the right occipital region and became more widespread with longer epilepsy duration. Longitudinally, patients with persistent spikes showed increasing connectivity over time, while those with spike resolution demonstrated decreasing connectivity, resulting in significant between-group differences.
Conclusions:
Functional connectivity in SeLECTS increases progressively with epilepsy duration and spike exposure, suggesting that ongoing spikes drive neural network alterations.
Significance:
Spikes are a potential treatment target to prevent progressive brain network disruption and preserve cognitive outcomes.
