Neurovascular coupling in the developing neonatal brain at rest.

Area of Science:

• Neonatal Neuroscience
• Developmental Neurobiology
• Medical Imaging

Background:

• The neonatal brain is highly dynamic, with developing connectivity and function.
• Neurovascular coupling (NVC) patterns in neonates differ from adults due to ongoing development.
• Understanding NVC in neonates is crucial for identifying and managing cerebral risks.

Purpose of the Study:

• To characterize the vascular response to spontaneous neuronal activations in preterm infants.
• To investigate the developmental trajectory of NVC in the immature brain.
• To explore the heterogeneity of NVC patterns in preterm infants.

Main Methods:

• Utilized a multiscale, multimodal, noninvasive approach for simultaneous recordings.
• Combined electrical, hemodynamic, and metabolic recordings in preterm infants.
• Analyzed vascular responses to spontaneous cortical activations.

Main Results:

• Neonatal vascular networks exhibit diverse NVC strategies, not a single response pattern.
• Observed varied NVC responses (positive, negative, mixed) in the same infant during recordings.
• Demonstrated age-related maturation of NVC in preterm infants.

Conclusions:

• Immature vascular networks display flexible NVC strategies.
• Heterogeneous NVC patterns highlight the developing nature of neonatal brain function.
• Findings contribute to understanding and preventing cerebral hemodynamic risks in preterm infants.