Dynamic touch induces autonomic changes in preterm infants as measured by changes in heart rate variability

Area of Science:

• Neuroscience
• Developmental Pediatrics
• Touch Research

Background:

• Preterm birth poses risks for long-term health and developmental issues.
• Tactile interventions are common in perinatal care, but their neurobiological mechanisms are understudied.
• C-tactile (CT) fibers, activated by gentle, dynamic touch, play a role in interoception and physiological regulation.

Purpose of the Study:

• To compare the effects of CT-optimal touch versus static touch on autonomic markers in preterm infants.
• To investigate the neurobiological underpinnings of nurturing touch in neonatal care.

Main Methods:

• Preterm infants (28-37 weeks gestational age) received either 5 minutes of CT-optimal velocity stroking touch or 5 minutes of static touch.
• Autonomic markers, including heart rate variability, were measured before, during, and after the touch interventions.

Main Results:

• CT touch significantly increased heart rate variability metrics associated with parasympathetic nervous system activity.
• These parasympathetic improvements persisted for 5 minutes post-intervention in the CT touch group.
• Static touch did not elicit similar increases in parasympathetic markers.

Conclusions:

• CT fibers effectively signal the affective quality of nurturing touch in preterm infants.
• These findings provide a neurobiological substrate for the benefits of neonatal tactile interventions.
• Optimizing touch for CT fiber activation may enhance the effectiveness of interventions for preterm infants.