Related Experiment Videos
The hormonal costs of subtle forms of infant maltreatment
Daphne Blunt Bugental1, Gabriela A Martorell, Veronica Barraza
1Department of Psychology, University of California, Santa Barbara, Santa Barbara, CA 93106, USA. bugental@psych.ucsb.edu
Insights
Infant maltreatment, including corporal punishment and maternal emotional withdrawal, impacts the child's stress response system. These early experiences can lead to long-term health and developmental risks.
Area of Science:
- Developmental Psychology
- Neuroendocrinology
- Childhood Adversity Research
Background:
- Early childhood maltreatment can have lasting effects on development.
- The infant adrenocortical system is sensitive to environmental influences.
- Maternal responsiveness plays a crucial role in infant stress regulation.
Purpose of the Study:
- To investigate the effects of subtle infant maltreatment on the adrenocortical response system.
- To examine the relationship between corporal punishment and infant stress reactivity.
- To assess the impact of maternal emotional withdrawal on infant cortisol levels.
Main Methods:
- Studied infants' hormonal reactivity to a stressor (separation from mother, stranger presence).
- Measured baseline cortisol levels in infants experiencing different forms of maternal interaction.
- Correlated types of infant maltreatment with specific adrenocortical markers.
Main Results:
- Frequent corporal punishment was associated with heightened infant hormonal stress reactivity.
- Frequent maternal emotional withdrawal was linked to elevated infant baseline cortisol levels.
- Maternal behaviors impacting stress buffering capacity have hormonal consequences for infants.
Conclusions:
- Subtle infant maltreatment can disrupt the normal functioning of the hypothalamic-pituitary-adrenal (HPA) axis.
- Altered HPA axis functioning in infancy may increase risk for later immune, cognitive, and social-emotional problems.
- Early life stress and maternal responsiveness significantly shape the developing neuroendocrine system.
Abstract:
We show here that subtle forms of maltreatment during infancy (below 1 year of age) have potential consequences for the functioning of the child's adrenocortical response system. Infants who received frequent corporal punishment (e.g., spanking) showed high hormonal reactivity to stress (a repeated separation from mother, combined with the presence of a stranger). In addition, infants who experienced frequent emotional withdrawal by their mothers (either as a result of maternal depression, or mother's strategic use of withdrawal as a control tactic) showed elevated baseline levels of cortisol. It was suggested that there are hormonal "costs" when mothers show response patterns (intentionally or unintentionally) that limit their utility as a means of buffering the child against stress. The hormonal responses shown by infants may alter the functioning of the hypothalamic-pituitary-adrenal (HPA) axis in ways that, if continued, may foster risk for immune disorders, sensitization to later stress, cognitive deficits, and social-emotional problems.