title: Whose clock makes yours tick? How maternal cardiorespiratory physiology influences newborns' heart rate variability.
abstract: This study examined the existence of direct maternal-infant physiological relatedness in respiratory sinus arrhythmia (RSA) when the infant was age 1, 2, 4, 8, and 12 weeks. We instructed mothers to breathe at 6, 12, 15, 20, and 6 cycles per minute while their infants lay on their body. The mother-infant ECG and respiration were registered and video recordings were made. RR-interval (RRI), respiration rate (fR) and RSA were calculated and mother-infant RSA response-patterns were analyzed. The results revealed that infants adjusted their RSA levels to their mothers' levels during the first 2 months of life, but not at 3 months of age, which could be interpreted as a continuing intra-uterine effect. The attenuation between 2 and 3 months could be a reflection of the 2-month developmental shift of social orientation.
authors: Research Group Interpersonal, Discursive and Narrative Studies (IDNS), Faculty of Psychology and Educational Sciences, Vrije Universiteit Brussel (VUB), Brussels, Belgium; VIPER Research Unit, Department Life, Royal Military Academy (RMA), Brussels, Belgium. Electronic address: mvpuyvel@vub.ac.be.
authors: Martine
authors: M
authors: Van Puyvelde
authors: Research Group Interpersonal, Discursive and Narrative Studies (IDNS), Faculty of Psychology and Educational Sciences, Vrije Universiteit Brussel (VUB), Brussels, Belgium; Universidad Católica Boliviana "San Pablo" La Paz (UCB), Bolivia.
authors: Gerrit
authors: G
authors: Loots
authors: Department of Mathematical Modeling, Statistics and Bioinformatics, Faculty of Bioscience Engineering, University of Ghent (UG), Ghent, Belgium.
authors: Joris
authors: J
authors: Meys
authors: VIPER Research Unit, Department Life, Royal Military Academy (RMA), Brussels, Belgium.
authors: Xavier
authors: X
authors: Neyt
authors: VIPER Research Unit, Department Life, Royal Military Academy (RMA), Brussels, Belgium; Department of Experimental and Applied Psychology, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
authors: Olivier
authors: O
authors: Mairesse
authors: Institute of Food, Nutrition and Human Health, Massey University, Palmerston North 4442, New Zealand; Faculty of Medicine and Bioscience, James Cook University, Queensland, Australia.
authors: David
authors: D
authors: Simcock
authors: VIPER Research Unit, Department Life, Royal Military Academy (RMA), Brussels, Belgium; Department of Experimental and Applied Psychology, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
authors: Nathalie
authors: N
authors: Pattyn
mesh_terms: D000328:Adult; D002657:Child Development; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008425:Maternal Behavior; D033261:Maternal-Fetal Relations; D009034:Mother-Child Relations; D009035:Mothers; D009043:Motor Activity / Q000502:physiology; D056152:Respiratory Rate / Q000502:physiology*; D065809:Respiratory Sinus Arrhythmia / Q000502:physiology*; D012890:Sleep / Q000502:physiology; D012931:Social Environment
keywords: 2-Month developmental shift; Breathing; Heart rate variability; Maternal–infant physiological synchrony; Mother–infant interaction; Physiological relationship; Respiratory sinus arrhythmia; Social development; Vagal maturation