Child and adolescent development of the brain oscillatory activity during a working memory task

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Developmental Neuroscience

Background:

• Working Memory (WM) is crucial for cognitive function.
• Understanding the developmental changes in brain activity during WM is essential.

Purpose of the Study:

• To investigate the developmental trajectories of brain oscillations during the encoding and maintenance phases of a Working Memory task.
• To explore age-dependent neural mechanisms underlying stimulus trace maintenance and anticipatory attention.

Main Methods:

• Utilized the Delayed-Match-to-Sample Test (DMTS) with 239 participants aged 6-29 years.
• Recorded electroencephalography (EEG) and obtained Event-Related Spectral Perturbation (ERSP) from 1-25 Hz.
• Simultaneously recorded behavioral parameters including reaction times (RTs) and response accuracy.

Main Results:

• Observed transient and sustained bursts of oscillatory activity across low frequencies and the beta range.
• Beta and low-frequency ERSP increases were prominent during encoding in all age groups.
• Low-frequency ERSP indexed maintenance in children/adolescents, while late adolescents/young adults showed Beta/Alpha for anticipatory attention.

Conclusions:

• Brain oscillation patterns during WM encoding and maintenance exhibit significant developmental changes.
• Age-dependent neural mechanisms are involved in stimulus trace maintenance and attention.
• Delta-Theta and Alpha oscillations play a mediating role between age and behavioral performance in WM.