The Manual Habituation and Discrimination of Shapes in Preterm Human Infants from 33 to 34+6 Post-Conceptional Age
Identifieur interne : 003507 ( Main/Exploration ); précédent : 003506; suivant : 003508The Manual Habituation and Discrimination of Shapes in Preterm Human Infants from 33 to 34+6 Post-Conceptional Age
Auteurs : Fleur Lejeune [France] ; Frédérique Audeoud [France] ; Leïla Marcus [France] ; Arlette Streri [France] ; Thierry Debillon [France] ; Edouard Gentaz [France]Source :
- PLoS ONE [ 1932-6203 ] ; 2010.
Abstract
Grasping at birth is well-known as a reflex in response to a stimulation of the palm of the hand. Recent studies revealed that this grasping was not only a pure reflex because human newborns are able to detect and to remember differences in shape features. The manual perception of shapes has not been investigated in preterm human infants. The aim of the present study was to investigate manual perception by preterm infants.
We used a habituation/reaction to novelty procedure in twenty-four human preterm infants from 33 to 34+6 post-conceptional age. After habituation to an object (prism or cylinder) in one hand (left or right) in a habituation phase, babies were given either the same object or the other (novel) object in the same hand in a test phase. We observed that after successive presentations of the same object, a decrease of the holding time is observed for each preterm infant. Moreover, a significant increase of the holding time is obtained with the presentation of the novel object. Finally, the comparison between the current performance of preterm infants and those of full-term newborns showed that preterm babies only had a faster tactile habituation to a shape.
For the first time, the results reveal that preterm infants from 33 to 34+6 GW can detect the specific features that differentiate prism and cylinder shapes by touch, and remember them. The results suggest that there is no qualitative, but only quantitative, difference between the perceptual abilities of preterm babies and those of full-term babies in perceiving shape manually.
Url:
DOI: 10.1371/journal.pone.0009108
PubMed: 20161731
PubMed Central: 2817723
Affiliations:
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xml:lang="fr">France</country><wicri:regionArea>Laboratoire Psychologie et NeuroCognition (UMR CNRS), CNRS and Université Pierre Mendès France, Grenoble</wicri:regionArea><placeName><settlement type="city">Grenoble</settlement></placeName></affiliation></author><author><name sortKey="Audeoud, Frederique" sort="Audeoud, Frederique" uniqKey="Audeoud F" first="Frédérique" last="Audeoud">Frédérique Audeoud</name><affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Service de Néonatologie, CHU Grenoble, Grenoble, France</addr-line></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea>Service de Néonatologie, CHU Grenoble, Grenoble</wicri:regionArea><placeName><settlement type="city">Grenoble</settlement></placeName></affiliation></author><author><name sortKey="Marcus, Leila" sort="Marcus, Leila" uniqKey="Marcus L" first="Leïla" last="Marcus">Leïla Marcus</name><affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Service de Néonatologie, CHU Grenoble, Grenoble, France</addr-line></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea>Service de Néonatologie, CHU Grenoble, Grenoble</wicri:regionArea><placeName><settlement type="city">Grenoble</settlement></placeName></affiliation></author><author><name sortKey="Streri, Arlette" sort="Streri, Arlette" uniqKey="Streri A" first="Arlette" last="Streri">Arlette Streri</name><affiliation wicri:level="4"><nlm:aff id="aff3"><addr-line>Laboratoire de Psychologie de la Perception (UMR CNRS), CNRS and Université Paris Descartes, Paris, France</addr-line></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Psychologie de la Perception (UMR CNRS), CNRS and Université Paris Descartes, Paris</wicri:regionArea><placeName><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Paris Descartes</orgName><placeName><settlement type="city">Paris</settlement><region type="region" nuts="2">Île-de-France</region></placeName></affiliation></author><author><name sortKey="Debillon, Thierry" sort="Debillon, Thierry" uniqKey="Debillon T" first="Thierry" last="Debillon">Thierry Debillon</name><affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Service de Néonatologie, CHU Grenoble, Grenoble, France</addr-line></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea>Service de Néonatologie, CHU Grenoble, Grenoble</wicri:regionArea><placeName><settlement type="city">Grenoble</settlement></placeName></affiliation></author><author><name sortKey="Gentaz, Edouard" sort="Gentaz, Edouard" uniqKey="Gentaz E" first="Edouard" last="Gentaz">Edouard Gentaz</name><affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Laboratoire Psychologie et NeuroCognition (UMR CNRS), CNRS and Université Pierre Mendès France, Grenoble, France</addr-line></nlm:aff><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Psychologie et NeuroCognition (UMR CNRS), CNRS and Université Pierre Mendès France, Grenoble</wicri:regionArea><placeName><settlement type="city">Grenoble</settlement></placeName></affiliation></author></analytic><series><title level="j">PLoS ONE</title><idno type="eISSN">1932-6203</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>Grasping at birth is well-known as a reflex in response to a stimulation of the palm of the hand. Recent studies revealed that this grasping was not only a pure reflex because human newborns are able to detect and to remember differences in shape features. The manual perception of shapes has not been investigated in preterm human infants. The aim of the present study was to investigate manual perception by preterm infants.</p></sec><sec><title>Methodology/Principal Findings</title><p>We used a habituation/reaction to novelty procedure in twenty-four human preterm infants from 33 to 34+6 post-conceptional age. After habituation to an object (prism or cylinder) in one hand (left or right) in a habituation phase, babies were given either the same object or the other (novel) object in the same hand in a test phase. We observed that after successive presentations of the same object, a decrease of the holding time is observed for each preterm infant. Moreover, a significant increase of the holding time is obtained with the presentation of the novel object. Finally, the comparison between the current performance of preterm infants and those of full-term newborns showed that preterm babies only had a faster tactile habituation to a shape.</p></sec><sec><title>Conclusion/Significance</title><p>For the first time, the results reveal that preterm infants from 33 to 34+6 GW can detect the specific features that differentiate prism and cylinder shapes by touch, and remember them. The results suggest that there is no qualitative, but only quantitative, difference between the perceptual abilities of preterm babies and those of full-term babies in perceiving shape manually.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Hooker, D" uniqKey="Hooker D">D Hooker</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Humphrey, T" uniqKey="Humphrey T">T Humphrey</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Humphrey, T" uniqKey="Humphrey T">T Humphrey</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gesell, A" uniqKey="Gesell A">A Gesell</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mcgraw, Mb" uniqKey="Mcgraw M">MB McGraw</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Erhardt, Rp" uniqKey="Erhardt R">RP 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Streri</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gentaz, E" uniqKey="Gentaz E">E Gentaz</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Grenoble</li><li>Paris</li></settlement><orgName><li>Université Paris Descartes</li></orgName></list><tree><country name="France"><noRegion><name sortKey="Lejeune, Fleur" sort="Lejeune, Fleur" uniqKey="Lejeune F" first="Fleur" last="Lejeune">Fleur Lejeune</name></noRegion><name sortKey="Audeoud, Frederique" sort="Audeoud, Frederique" uniqKey="Audeoud F" first="Frédérique" last="Audeoud">Frédérique Audeoud</name><name sortKey="Debillon, Thierry" sort="Debillon, Thierry" uniqKey="Debillon T" first="Thierry" last="Debillon">Thierry Debillon</name><name sortKey="Gentaz, Edouard" sort="Gentaz, Edouard" uniqKey="Gentaz E" first="Edouard" last="Gentaz">Edouard Gentaz</name><name sortKey="Marcus, Leila" sort="Marcus, Leila" uniqKey="Marcus L" first="Leïla" last="Marcus">Leïla Marcus</name><name sortKey="Streri, Arlette" sort="Streri, Arlette" uniqKey="Streri A" first="Arlette" last="Streri">Arlette Streri</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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