Background: The autonomic nervous system (ANS) processes underlying attachment-related mother-child interactions are not well understood. We aimed to describe and compare the responsivity of the ANS for mothers and their infants during the different phases of the Strange Situation Procedure (SSP).
Methods: Continuous measurements of the sympathetic (SNS) and parasympathetic (PNS) branches of the ANS were obtained simultaneously in 91 mothers and their infants (range 10-15 months).