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Updated: Aug 8, 2026
Neurodevelopmental Reflex Testing in Neonatal Rat Pups
Published on: April 24, 2017
The blink reflex: maturation and modification in the neonate
E K Anday1, M E Cohen, H S Hoffman
1Department of Pediatrics, University of Pennsylvania, School of Medicine, Philadelphia 19104.
Insights
The blink reflex in infants develops with gestational age, showing maturation in preterm infants by term postconceptional age. Neurological development impacts these brainstem processes, unaffected by environmental influences.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Auditory Neuroscience
Background:
- The blink reflex is a fundamental neurological response.
- Understanding its development in infants is crucial for assessing neurological maturation.
- Preterm infants may exhibit altered developmental trajectories.
Purpose of the Study:
- To longitudinally investigate the development of the delayed blink response in preterm and term infants.
- To examine how an acoustic stimulus modifies this response during development.
- To assess the impact of gestational age on blink reflex maturation.
Main Methods:
- Longitudinal study design.
- Eliciting delayed blink response via glabellar tap.
- Introducing acoustic stimulus (tone) to assess modification.
- Comparing responses between preterm and term infant groups.
Main Results:
- Blink amplitude demonstrated a significant increase with advancing gestational age.
- By term postconceptional age, preterm infants' responses matched those of term infants.
- Both tap-alone and tap-with-tone responses showed similar developmental patterns.
Conclusions:
- Neurological development, reflected in blink reflex maturation, follows an orderly progression.
- Brainstem processes underlying the blink reflex appear robust to environmental influences during this developmental period.
- The study provides insights into normative neurological development in infants.
Abstract:
The onset and development of the delayed blink response, elicited by a tap to the glabella, and its modification by an acoustic stimulus (tone), were studied longitudinally in 36 healthy preterm and 43 term infants. Blink amplitude increased with gestational age. By term postconceptional age, the responses of the preterm infants to tap alone, and to both tap and tone, were not significantly different from those of the term infants. These results suggest that neurological development, as reflected by the blink reflex and its modification, proceeds in an orderly, sequential fashion and that the mechanisms affecting these brainstem processes are not altered by environmental influences.
