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Alpha electroencephalogram (EEG) asymmetry among toddlers in foster care
Kellyn N Blaisdell1, Tyson V Barker1, Ryan J Giuliano2
1University of Oregon, Department of Psychology, OR, USA.
Insights
Toddlers in foster care show different brain activity patterns, specifically greater right alpha asymmetry, compared to peers. This neurobiological difference may stem from early life adversity but isn't linked to current behaviors.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Welfare
Background:
- Early childhood maltreatment and disrupted caregiving negatively impact development.
- Alpha electroencephalogram (EEG) asymmetry is a neurobiological marker linked to maltreatment.
- Previous studies focused on older children, leaving a gap in understanding early development.
Purpose of the Study:
- To investigate alpha EEG asymmetry in toddlers within the foster care system.
- To explore behavioral correlates of EEG asymmetry in this vulnerable population.
- To compare neurobiological markers between foster toddlers and a low-income community sample.
Main Methods:
- Examined electroencephalogram (EEG) alpha asymmetry in foster toddlers (n=38) and a comparison group (n=16).
- Assessed behavioral correlates, including internalizing and externalizing behaviors.
- Analyzed differences in frontal and parietal asymmetry.
Main Results:
- Foster toddlers displayed significantly greater right alpha asymmetry, particularly in the parietal region.
- No clear associations were found between frontal or parietal asymmetry and behavioral measures.
- Findings highlight neurobiological differences in young children exposed to foster care.
Conclusions:
- Early adversity in foster care is associated with distinct patterns of brain activity (alpha EEG asymmetry) in toddlers.
- Further research is needed to understand the neurobiological and behavioral interplay following early adversity.
- These findings underscore the importance of early intervention for children in foster care.
Abstract:
The majority of children living in foster care in the United States have a history of maltreatment and/or disrupted caregiving. Maltreatment in early childhood adversely affects development at many levels, including neurobiology and behavior. One neurobiological measure associated with maltreatment is alpha electroencephalogram (EEG) asymmetry. Prior research has found greater right frontal asymmetry among children with a history of maltreatment. However, little research has been extended developmentally downward to examine alpha asymmetry and its behavioral correlates among toddlers in foster care; this was the purpose of the present study. Differences in EEG asymmetry were examined between a sample of foster toddlers (mean age = 3.21 years, n = 38) and a community comparison, low-income sample without a history of foster care (mean age = 3.04 years, n = 16). The toddlers in the foster care group exhibited greater right alpha asymmetry, primarily driven by differences in parietal asymmetry. Neither frontal nor parietal asymmetry were clearly related to internalizing or externalizing behaviors, measured concurrently or at previous time points. These findings reveal differences in alpha EEG asymmetry among toddlers in foster care, and highlight the need to better understand associations between neurobiological and behavioral functioning following early adversity.
