Analysis Pain-Induced EEG Delta Band Alterations in Preterm Infants: A Gestational Age Perspective

Area of Science:

• Neonatal neuroscience
• Clinical neurophysiology
• Developmental pediatrics

Background:

• Pain in preterm infants significantly impacts neurodevelopment due to immature pain pathways.
• Cortical pain processing differences based on gestational age are not well understood.
• Gestational age influences pain perception and processing in vulnerable infants.

Purpose of the Study:

• To investigate gestational age-related differences in electroencephalogram (EEG) delta band power during pain stimuli in preterm infants.
• To analyze alterations in slow delta (1-2 Hz) and fast delta (2-4 Hz) EEG power during heel puncture across different preterm groups.
• To explore the relationship between prematurity and cortical pain processing.

Main Methods:

• EEG frequency power analysis was conducted on Fp1, Fp2, C3, and C4 channels.
• Data were collected from extremely preterm (EPT), very preterm (VPT), and moderate to late preterm infants (MLPT) during heel puncture.
• Slow and fast delta band power changes were compared between baseline and pain stimulation.

Main Results:

• All preterm groups showed a significant increase in slow delta band power across all analyzed EEG channels.
• Fast delta power increased significantly in EPT and VPT infants at frontal electrodes (Fp1, Fp2).
• The magnitude of slow delta band power increase was inversely correlated with gestational age, being highest in EPT infants.

Conclusions:

• EEG delta band power alterations during pain are dependent on gestational age and brain region.
• Decreasing gestational age is associated with greater increases in delta band power, indicating heightened pain sensitivity.
• Changes in slow delta band EEG power offer a potential objective measure for pain assessment and management in preterm infants in the NICU.