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Updated: Sep 28, 2026
A Preterm Rat Model for Pain Studies
Published on: February 9, 2024
Early pain in preterm infants. A model of long-term effects
1Centre for Community Child Health Research, Room L408, B.C. Research Institute for Children's and Women's Health, Department of Pediatrics, University of British Columbia, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada. rgrunau@cw.bc.ca
Insights
Pain in premature infants can impact long-term development and behavior. This study presents a model to understand how early pain exposure affects pain systems and developmental trajectories in vulnerable newborns.
Area of Science:
- Neonatal development
- Pain research
- Developmental psychology
Background:
- Premature infants experience significant pain in the neonatal intensive care unit.
- Early pain exposure may alter the development of pain pathways.
- Altered developmental trajectories are observed in vulnerable preterm infants.
Purpose of the Study:
- To propose a model for examining the long-term effects of newborn pain.
- To contextualize pain's impact within infant development.
- To identify factors contributing to altered developmental trajectories.
Main Methods:
- Review of existing evidence on pain and development in preterm infants.
- Development of a conceptual framework integrating multiple contributing factors.
- Analysis of infant, experience, and caregiver characteristics.
Main Results:
- Pain exposure and cumulative stress in the NICU are key factors.
- Infant characteristics (gestation, illness severity, rapid brain development) influence outcomes.
- Caregiver and social context play a role in developmental trajectories.
Conclusions:
- A developmental context framework is crucial for understanding pain's long-term effects.
- Interventions should consider the multifaceted nature of pain exposure and development.
- Further research is needed to validate the proposed model.
Abstract:
There are multiple lines of evidence suggesting that in vulnerable prematurely born infants, repeated and prolonged pain exposure may affect the subsequent development of pain systems, as well as potentially contribute to alterations in long-term development and behavior. Multiple factors cumulatively contribute to altered developmental trajectories in such infants. These include characteristics of the developing organism (low tactile threshold, sensitization, rapid brain development), characteristics intrinsic to the infant (gestation, illness severity), characteristics of the experience in the neonatal intensive care unit (pain exposure and cumulative stress), and characteristics of the caregivers within their family and social context. This article provides a model for examining long-term effects of pain in the newborn period embedded in a developmental context framework.
