According to a study led by researchers from University College London (UCL), preterm infants do not habituate to repeated pain in the same way as full-term infants, children, and adults. The authors of the new study published in the journal Current Biology suggest that if preterm infants have no
Recent research has revealed that preterm infants do not habituate, or get used to, repeated pain in the same way as full-term infants, children, and adults. This lack of pain habituation could potentially impact their development, as the ability to become accustomed to moderate, non-life-threatening pain is believed to develop during the third trimester of pregnancy, and preterm babies might not have developed this ability at birth.
The study involved 20 infants at University College London Hospitals . Half of them were preterm , while the other half were either born at full term or preterm but tested at term age . The two groups were comparable in terms of their actual postnatal age, as the preterm babies had a median age of 14 days, compared to 10 days among the full-term group.
The researchers found that the brain activity was not as strong immediately after the second heel lance, compared to the first, suggesting a habituation response, but this was only the case for full-term infants. They found a similar pattern for heart rate and facial expressions, as preterm infants reacted just as strongly to both heel lances, while the full-term infants appeared to habituate to the pain.
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