the mature nervous system of the caregiver becomes intertwined with the undeveloped nervous system of the infant to create a model of ‘symbiotic regulation.’ The caregiver becomes part of a complex feedback system supporting the biological and behavioral needs of the infant.
Porges coins ‘symbiotic regulation’ to describe how the caregiver’s nervous system functionally substitutes for the infant’s immature one, constituting a bidirectional neuroregulatory dyad.
, The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-Regulation, 2011thesis