The intrahemispheric functional properties of the developing sensorimotor cortex are influenced by maturation

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Brain Network Analysis

Background:

• The sensorimotor cortex's functional development is crucial for anticipating developmental disorders.
• The rolandic mu rhythm characterizes sensorimotor cortex function from infancy.
• Limited understanding exists on sensorimotor network development and its role in perceptual-motor coupling.

Purpose of the Study:

• To investigate the developmental trajectory of sensorimotor network functional connectivity and topology from infancy to adulthood.
• To explore how sensorimotor processing evolves with age and maturation.
• To determine if prehension tasks alter sensorimotor network properties compared to rest.

Main Methods:

• Magnetoencephalography (MEG) data analyzed from infants, children, and adults.
• Functional connectivity and topological properties assessed using synchronization likelihood and segregation/integration measures.
• Analysis focused on the mu rhythm frequency range over the sensorimotor cortex.

Main Results:

• Sensorimotor network functional measures remained stable during the first year of life.
• Significant increases in segregation and integration properties observed from childhood to adulthood.
• The network evolved from a random organization in infants to a more efficient "small-world" organization in children and adults.
• No significant changes in functional properties were detected between rest and prehension conditions.

Conclusions:

• Sensorimotor cortex functional properties are primarily modulated by maturation rather than acute task demands.
• Brain development leads to a more organized and efficient sensorimotor network with age.
• These findings provide insights into typical sensorimotor development and its underlying neural mechanisms.