EEG and ECG from 5 to 10 months of age: developmental changes in baseline activation and cognitive processing during...

Area of Science:

• Developmental neuroscience
• Cognitive neuroscience
• Psychophysiology

Background:

• Infant working memory development is crucial for cognitive growth.
• Understanding the psychophysiological underpinnings of early cognitive development is essential.

Purpose of the Study:

• To investigate age-related changes in electroencephalogram (EEG) and electrocardiogram (ECG) during baseline and a working memory task in infants.
• To examine the functional significance of these psychophysiological measures during cognitive processing in the first year of life.

Main Methods:

• Recorded EEG and ECG from 20 infants monthly between 5 and 10 months of age.
• Collected data during baseline rest and during the looking A-not-B task assessing infant working memory.
• Analyzed age-related changes in EEG power, EEG coherence, and heart rate (HR).

Main Results:

• Baseline data revealed age-related increases in EEG power and coherence, and decreases in HR.
• Task performance showed increases in EEG power across all sites, but no significant changes in EEG coherence or HR.
• Localized task-related EEG power changes were observed by 10 months of age.

Conclusions:

• EEG and ECG demonstrate significant age-related changes during infancy.
• These psychophysiological measures are functionally relevant during both resting states and cognitive tasks in early development.
• The findings highlight the interplay between neural and cardiac activity in infant working memory development.