Related Experiment Video
Updated: Oct 10, 2025
Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
Infant EEG Band Power Analysis at 6 Months and 18 Months
Insights
Infant brain activity shows developmental shifts in frequency band power from 6 to 18 months. This study links these changes and a new sustainability index to visual expectation responses.
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Science
Background:
- Infant neural development is a key research area.
- Understanding brain activity changes during early development is crucial.
Purpose of the Study:
- Investigate changes in frequency band power in infants aged 6-18 months.
- Introduce and analyze a sustainability index for neural activity.
- Explore correlations between neural activity and visual expectation (VE) scores.
Main Methods:
- Auditory oddball experiment to measure frequency band power in 112 infants.
- Visual expectation paradigm test for 177 infants.
- Correlation analysis between VE scores and neural activity in 47 infants.
Main Results:
- Frequency band power decreased in delta/theta bands and increased in alpha/beta bands with age.
- The sustainability index showed increased alpha/beta band power and decreased delta/theta band power.
- Reaction speed correlated significantly with band power changes and sustainability index in specific brain regions and higher frequencies.
Conclusions:
- Infant brain activity undergoes significant developmental changes between 6 and 18 months.
- The sustainability index effectively captures age-related neural activity modulation.
- Neural development, as measured by band power and sustainability, is linked to visual expectation processing and reaction speed.
Abstract:
Neural development of infants has drawn increasing research interests from the community. In this paper, we investigated the frequency band power of 112 infants who participated in an auditory oddball experiment, and the visual expectation (VE) score of 177 infants who went through a visual expectation paradigm test. Analysis found that the frequency band power decreases in the delta and theta bands, and increases in the alpha and beta bands when the infants grow up from 6 months old to 18 months old. We also proposed a sustainability index to measure the capability of a subject to maintain their band power in the auditory oddball experiment when infants grow up from 6 months old to 18 months old. Analysis shows that the sustainability index increased significantly in the alpha and beta band, decreased in the delta and theta bands. Correlation between the VE score and frequency band power was investigated on 47 infants who participated in both auditory oddball experiment and visual expectation paradigm test. Analysis shows that the reaction speed to stimulus have statistical a significant correlation with the changes of band power and sustainability index in posterior and temporal section, and in the higher frequency bands.
