Functional individual variability development of the neonatal brain.

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Cognitive Neuroscience

Background:

• Individual differences in cognition and behavior originate from prenatal brain development.
• Understanding individual variability in neonatal brain functional architecture is crucial due to nascent long-range connectivity and segregated functions.

Purpose of the Study:

• To characterize individual functional variability at a local level in the neonatal brain.
• To investigate the relationship between age and local functional variability in neonates.

Main Methods:

• Utilized resting-state functional magnetic resonance imaging (fMRI) data from 163 neonates (32-45 postconceptional weeks).
• Analyzed functional parcellation similarity, local brain activity, and local functional connectivity to assess individual variability.
• Examined regional differences in variability and the effect of age on these measures.

Main Results:

• Significantly higher local functional individual variability was observed in the superior parietal, sensorimotor, and visual cortex.
• Lower variability was noted in the frontal, insula, and cingulate cortex compared to other regions.
• Mean local functional individual variability increased with age, with a more pronounced effect in the occipital, temporal, prefrontal, and parietal cortex.

Conclusions:

• Neonatal brain development exhibits distinct patterns of local functional variability across regions.
• Local functional variability increases with age, reflecting regional maturation processes.
• Findings contribute to understanding brain plasticity and differential maturation in early development.