Examining stress reactivity in neonates: relations between cortisol and behavior

Area of Science:

• Neonatal research
• Pediatric stress response
• African American health

Background:

• Cortisol is a key stress hormone.
• Behavioral and biological stress reactivity are crucial in neonates.
• African American neonates are underrepresented in stress research.

Purpose of the Study:

• To examine the association between cortisol and behavioral reactivity in African American neonates.
• To investigate how different stressors (heel stick, neurobehavioral exam) influence this association.
• To address the underrepresentation of African American neonates in stress research.

Main Methods:

• 100 healthy African American neonates were studied.
• Continuous measures of behavioral distress were used.
• Cortisol reactivity was measured in response to two stressors: a medical heel stick and a neurobehavioral exam.

Main Results:

• Behavioral distress was associated with cortisol reactivity to both stressors.
• High behavioral distress correlated with cortisol reactivity to the neurobehavioral exam.
• Low behavioral distress correlated with cortisol reactivity to the heel stick.

Conclusions:

• The relationship between cortisol and behavioral stress reactivity is complex in neonates.
• Operationalizing behavioral distress and considering the stressor context are important for understanding stress responses.
• Findings contribute to understanding stress in underrepresented neonatal populations.