Infant attention and frontal EEG neuromarkers of childhood ADHD
Cassondra M Eng1, Leslie A Patton2, Martha Ann Bell2
1Department of Psychiatry & Behavioral Sciences, Stanford University, Center for Interdisciplinary Brain Sciences Research, 1520 Page Mill Road, Stanford, CA 94304, USA; Department of Psychology, Virginia Tech, 890 Drillfield Drive, Blacksburg, VA 24060, USA.
Insights
Early markers for attention deficit hyperactivity disorder (ADHD) may include lower frontal electroencephalogram (EEG) power and longer looking fixations in 5-month-old infants, predicting later childhood ADHD symptoms.
Area of Science:
- Neuroscience
- Developmental Psychology
- Pediatrics
Background:
- Attention deficit hyperactivity disorder (ADHD) research has primarily focused on older populations.
- Understanding early neural and behavioral markers in infancy is crucial for early identification and intervention.
Purpose of the Study:
- To investigate early electroencephalogram (EEG) and behavioral attention differences in 5-month-old infants who were later diagnosed with ADHD.
- To identify potential early markers for ADHD in infancy.
Main Methods:
- Retrospective analysis comparing 40 infants later diagnosed with ADHD to 40 matched controls at 5 months of age.
- Measured frontal EEG power (6-9 Hz infant alpha band) and behavioral attention (looking fixations).
- Correlated infant measures with childhood ADHD symptomatology at ages 4 and 9.
Main Results:
- Infants later diagnosed with ADHD showed longer looking fixations and lower frontal alpha EEG power compared to controls.
- Frontal EEG power correlated with visual fixation duration.
- Longer infant looking fixations predicted higher childhood ADHD symptoms.
Conclusions:
- Decreased infant frontal EEG power and prolonged looking fixations at 5 months may be early indicators of later ADHD.
- These findings support the use of infant EEG and attention measures for early ADHD detection.
- Establishes potential early markers for ADHD within a developmental neuroscience framework.
Abstract:
Numerous electroencephalogram (EEG) studies have sought to elucidate the neural mechanisms of attention deficit hyperactivity disorder (ADHD), with most of the existing literature focused on children, adolescents, and adults. In this retrospective study, measures of frontal EEG power and behavioral attention of 40 5-month-old infants later diagnosed with ADHD in childhood were compared to 40 systematically matched-control infants. Compared to the control group, infants in the ADHD group exhibited longer looking fixations during an attention task. Frontal EEG power in the 6-9 Hz infant alpha band was lower in the ADHD group compared to the control group. Mean frontal EEG power was associated with visual fixations, underscoring specific attention behavior corresponding to frontal brain development in infancy. Infants later diagnosed with ADHD exhibited higher attention problems in childhood at ages 4 and 9 compared to the control group, and longer looking fixations in infancy were associated with higher childhood ADHD-related symptomatology. These findings suggest that decreased infant frontal EEG power and looking fixations as early as 5-months of age may serve as important early markers of later ADHD and can aid in building a more comprehensive model of ADHD from a developmental neuroscience approach.
