EEG activation in preschool children: Characteristics and predictive value for current and future mental health
Mia E Fernandez1, Stuart J Johnstone1, Stephanie Varcoe1
1School of Psychology, University of Wollongong, Australia.
Insights
This study found that task-related frontal electroencephalogram (EEG) activation indices in preschoolers predict externalizing behaviors, offering early identification for children transitioning to kindergarten. These findings highlight the link between physiological activation and behavioral outcomes.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Psychiatry
Background:
- Previous research on electroencephalogram (EEG) activation has focused on primary school children and adults.
- Task-related activation has not been previously studied in preschool children.
- This study investigates physiological activation in preschoolers and its predictive value for mental health.
Purpose of the Study:
- To characterize resting and task-related frontal EEG activation in 4- to 5-year-old children.
- To determine if these activation indices predict current and future mental health status.
- To explore the relationship between EEG activation and externalizing behaviors.
Main Methods:
- Frontal EEG was recorded from 81 preschool children during eyes-closed rest, eyes-open rest, and an inhibitory control task.
- Activation indices were calculated from EEG data.
- Parent-reported Child Behavior Checklist data were collected at baseline and 6-8 months later.
Main Results:
- Resting activation showed decreased delta, theta, and alpha power with eyes open vs. closed, and increased beta power.
- Task-related activation showed increased delta, theta, and alpha power, and decreased beta power.
- Frontal delta and theta task-related activation significantly predicted externalizing behaviors in both preschool and kindergarten.
Conclusions:
- Resting activation patterns in preschoolers resemble those in older individuals.
- Task-related activation patterns in preschoolers show novel effects compared to adults.
- Task-related activation indices predict current and future externalizing behaviors, aiding early identification.
Background:
Previous research has characterised EEG changes associated with resting activation in primary school children and adults, while task-related activation has only been considered in adults. The current study characterises physiological activation in preschool children and examines the potential value of activation indices for predicting mental health status at two time points.
Aims:
To investigate how resting activation and task-related activation are represented in 4- to 5-year-old preschool children and examine if these activation indices can predict current and future mental health status.
Methods And Procedures:
Frontal EEG was recorded from 81 preschool children during eyes-closed resting, eyes-open resting, and an inhibitory control task to allow calculation of activation indices. The Child Behaviour Checklist was completed by the child's parent at this time, and again 6-8 months later after the child's transition to kindergarten.
Outcomes And Results:
Resting activation was represented by reductions in frontal delta, theta, and alpha power in the eyes-open compared to eyes-closed condition, and an increase in frontal beta power. Task-related activation was represented by increases in frontal delta, theta, and alpha power and a decrease in beta power. Frontal delta and theta task-related activation significantly predicted externalising behaviours in both preschool and kindergarten, with stronger prediction in kindergarten.
Conclusions And Implications:
This study characterised resting and task-related activation in preschool children, and reported similar effects to those found in older children and adults for resting activation, with novel effects for task-related activation. As task-related activation indices were predictive of externalising behaviours in both preschool and kindergarten, these results have implications for early identification of children who experience externalising behavioural problems across the transition to school period. WHAT DOES THIS STUDY ADD?: This study provides new data on how the fundamental physiological processes of resting and task-related activation, both of which are theorised to contribute to "upstream" processes such as executive functions and broader behaviour, are represented in the frontal EEG of preschool aged children. We also learn that the top-down task-related activation indices for delta and theta activity were predictive of current mental health status and future status after the transition to kindergarten, while the bottom-up resting activation indices were not.
