Polyvagal Theory and Neonatal Sleep: A Review of Autonomic Regulation and Implications for Sudden Infant Death Syndrome

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Beyazgul S., Laleh S. s.

INTERNATIONAL JOURNAL OF DEVELOPMENTAL NEUROSCIENCE, vol.85, no.6, 2025 (SCI-Expanded, Scopus)

• Publication Type: Article / Review
• Volume: 85 Issue: 6
• Publication Date: 2025
• Doi Number: 10.1002/jdn.70050
• Journal Name: INTERNATIONAL JOURNAL OF DEVELOPMENTAL NEUROSCIENCE
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, EMBASE, MEDLINE
• Istanbul University Affiliated: No

Abstract

Background Neonatal sleep is critical for brain maturation and autonomic nervous system regulation. Disruptions in sleep patterns and vagal tone may contribute to the risk of sudden infant death syndrome (SIDS). Methods This narrative review summarizes current evidence on the relationship between neonatal sleep states, autonomic nervous system maturation and polyvagal theory. Results Studies suggest that vagal activity modulates neonatal sleep states, with implications for both emotional and physiological development. Premature infants may display immature vagal pathways, increasing their vulnerability to sleep-related disorders and SIDS. Conclusion The polyvagal framework offers a useful lens for understanding neonatal sleep regulation and guiding strategies for SIDS prevention and healthy neonatal care. Further research is warranted.