The effect of postnatal age on the early tactile manual abilities of preterm infants

Lejeune, Fleur; Berne-Audéoud, Frédérique; Marcus, L.; Debillon, Thierry; Gentaz, Édouard

doi:10.1016/j.earlhumdev.2014.02.002

Cited by 10 publications

(12 citation statements)

References 33 publications

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“…Indeed, preterm infants who succeeded to habituate to the object in the Noise condition, needed more time and trials to attain the habituation criterion than those in the Silence condition. Consistent with previous studies, preterm infants displayed a strong and effective tactile habituation process in the Silence condition 17 18 23 . However, this ability to memorize tactile information seems to be weakened by the concomitant exposure to the alarm sound of the feeding system.…”

Section: Discussionsupporting

confidence: 91%

“…Secondly, the infants of the Silence condition held the novel object, presented during the test phase, significantly longer than the familiar one during the last two habituation trials, confirming the presence of manual discrimination between a prism and a cylinder in preterm infants 17 18 23 . This result was objectivized by the control group, who were presented with the same object throughout the entire experiment and who displayed, as expected, an equivalent holding time between the end of the habituation and the test phase.…”

Section: Discussionmentioning

confidence: 59%

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Sound Interferes with the Early Tactile Manual Abilities of Preterm Infants

Lejeune

Parra

Berne-Audéoud

et al. 2016

Sci Rep

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Premature birth is a sudden change of the sensory environment of a newborn, while their senses are still in development, especially in the stressful and noisy environment of the NICU. The study aimed to evaluate the effect of noise on the early tactile manual abilities of preterm infants (between 29 and 35 weeks PCA). Infants were randomly assigned to one of the two conditions: Silence and Noise. For each condition, two phases were introduced: a habituation phase (repeated presentation of the same object, prism or cylinder), followed by a test phase (presentation of the familiar or a novel object). In the Silence condition, they received the tactile habituation and test phases: In the Noise condition, they went through the same phases, while an alarm sounded. Sixty-three preterm infants were included. They displayed a strong and effective ability to memorize tactile manual information and to detect the difference between two shape features, but this ability seems to be impaired by the concomitant exposure to an alarm sound. This study is the first to highlight the effect of a negative stimulus on sensory functioning in premature infants. It reinforces the importance of developing environmental measures to lower the sound level in NICUs.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 59%

Sound Interferes with the Early Tactile Manual Abilities of Preterm Infants

Lejeune

Parra

Berne-Audéoud

et al. 2016

Sci Rep

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“…Regardless of the texture of objects, both patterns of habituation are comparable, though differences exist across participants with latepreterm infants requiring more time to get habituated than early-term neonates. This result gives some support to previous works concluding to haptic habituation to texture in full-term neonates (Molina & Jouen, 2004) and to shape of object in preterm neonates (Lejeune et al, 2010(Lejeune et al, , 2014.…”

Section: Discussionsupporting

confidence: 91%

Active touch in late‐preterm and early‐term neonates

Molina

Sann

David

et al. 2015

Developmental Psychobiology

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An infant-controlled tactile habituation without visual control procedure was used to evaluate the ability of 32 late-preterm neonates (mean gestational age: 34 weeks) and 32 early-term neonates (mean gestational age: 38 weeks) to actively explore with hands objects varying in texture (smooth, granular). Holding time and Hand Pressure Frequency (HPF) were recorded. Holding time decreased as habituation progressed in both group of neonates. Holding time increased from habituation trials to test trials only in early-term neonates. A reaction to novelty was only observed in early-term neonates. During habituation, HPF remained unchanged in late-preterm infants whereas HPF decreased in early-term infants. HPF increased from habituation trials to test trials in early-term neonates and in late-preterm infants. However, reaction to novelty was only observed for early-term infants. The significance of these results is discussed in reference to brain maturation in preterm infants.

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“…Differences in the skin cornification processes in utero and in a NICU setting may explain the finding. Differences in the haptic perception of premature infants during their NICU stay may be relevant for the changes in the reflex threshold, particularly in comparison with term infants .…”

Section: Discussionmentioning

confidence: 99%

The flexion withdrawal reflex increases in premature infants at 22–26 weeks of gestation due to changes in spinal cord excitability

et al. 2017

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AimOur aim was to study the development of the cutaneous flexion withdrawal reflex among premature infants admitted to the neonatal intensive care unit of the Children's Hospital, University of Cologne, in 2013.MethodologyThis longitudinal cohort study explored the development of spinal cord excitability of 19 premature infants born at 22–26 weeks of gestation. We performed five investigations per subject and studied changes in the reflex threshold with increasing postnatal age at different behavioural states. The premature infants were stimulated with von Frey filaments on the plantar surface of the foot near the first metatarsophalangeal joint during the first 3 days of life and at postnatal ages of 10–14 days, 21–28 days, 49–59 days and a corrected gestational age of 37–40 weeks.ResultsThe mean gestational age of the premature infants included in the study was 24 weeks. Premature infants with a gestational age of less than 26 weeks presented a flexion withdrawal reflex with a low threshold (0.5–2.85 milli‐Newton) in the first 72 hours of life.ConclusionThe flexion withdrawal reflex among premature infants born at less than 26 weeks showed a continuous threshold increase with increasing postnatal age, reflecting changes in spinal cord excitability.

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The effect of postnatal age on the early tactile manual abilities of preterm infants

Cited by 10 publications

References 33 publications

Sound Interferes with the Early Tactile Manual Abilities of Preterm Infants

Sound Interferes with the Early Tactile Manual Abilities of Preterm Infants

Active touch in late‐preterm and early‐term neonates

The flexion withdrawal reflex increases in premature infants at 22–26 weeks of gestation due to changes in spinal cord excitability

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