Functional network integration and attention skills in young children

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Early childhood is a critical period for rapid brain development and the acquisition of attention skills.
• Research on attention in young children is limited due to methodological challenges in neuroimaging.
• Understanding brain mechanisms underlying attention development in early childhood is crucial.

Purpose of the Study:

• To investigate the relationship between age, attention skills, and functional connectivity (FC) in intrinsic connectivity networks (ICNs) in typically developing girls aged 4-7 years.
• To identify how different types of attention (sustained, selective, executive) relate to FC in specific brain networks during passive viewing.
• To explore age-related changes in FC across multiple ICNs in early childhood.

Main Methods:

• Utilized functional magnetic resonance imaging (fMRI) during passive viewing in 60 typically developing girls (4-7 years old).
• Assessed sustained, selective, and executive attention skills using standardized assessments.
• Employed Independent Component Analysis (ICA) and dual regression to identify ICNs and analyze individual FC patterns, regressing against age and attention skills while controlling for age.

Main Results:

• Most intrinsic connectivity networks (ICNs), excluding the ventral attention network (VAN), demonstrated increased functional connectivity (FC) with advancing age.
• Selective attention positively correlated with FC in the dorsal attention network (DAN).
• Sustained attention showed a positive relationship with FC in visual and auditory ICNs.
• Executive attention was positively associated with FC in the default mode network (DMN) and visual ICN.

Conclusions:

• Functional connectivity increases with age across multiple brain networks in early childhood.
• Distinct attention skills are supported by specific, distributed intrinsic connectivity networks (ICNs).
• These findings underscore the integration of distributed networks in supporting the development of attention skills during early childhood.