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Infants Show Physiological Responses Specific to Parental Hugs
Sachine Yoshida1, Yoshihiro Kawahara2, Takuya Sasatani3
1Department of Anatomy, Faculty of Medicine, Toho University, Ota-ku, Tokyo 143-8540, Japan; PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan.
Iscience
|April 8, 2020
Summary
Infants over four months old show reduced heart rates during parental hugs, indicating a calming parasympathetic response. This study reveals the hug
Area of Science:
- Developmental Psychology
- Infant Behavior
- Physiological Responses
Background:
- Parental affection, like hugging, is crucial for infant development.
- The physiological impact of hugs on infants remains largely unstudied.
- Understanding infant responses to physical touch can inform bonding and development.
Purpose of the Study:
- To investigate infant heart rate variability (HRV) during parental hugs.
- To compare infant responses to different types of parental touch (hug, hold, tight hug).
- To explore factors influencing infant physiological responses to hugs, such as age and movement.
Main Methods:
- Heart rate responses, specifically R-R interval (RRI), were measured in infants.
- Infants were subjected to controlled hugging, holding, and tight hugging by parents.
- Infant head movements and stranger hugs were also observed and recorded.
Main Results:
- Infants older than four months exhibited increased RRI during parental hugs, signifying parasympathetic activation.
- Fewer infant head movements correlated with a greater RRI increase during hugs.
- Infants younger than four months showed decreased RRI with increased contact pressure, while parents showed increased RRI during hugs.
Conclusions:
- Parental hugs promote parasympathetic activity and may enhance parent-infant bonding.
- Infant physiological responses to hugs vary by age and type of touch.
- Hugging plays a significant role in infant psychophysiological development and emotional regulation.
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