Alcance e apreensão de objetos em lactentes com síndrome de Down : impacto da interação organismoambiente
Notice bibliographique
Résumé
The acquisition and the refinement of motor skills have been described to require a reciprocal relationship between organismic and environmental conditions.This interaction is evidenced in studies identifying the impact of intrinsic and extrinsic factors on functional skills such as reaching and grasping objects.Thus, Study 1 was conducted in order to review the research on factors influencing reaching and grasping in infants at risk for developmental delays.The review has shown that few studies have aimed to understand the development of actions performed by Down syndrome (DS) infants, and also that there is a lack of information about these infants' abilities to adjust their intrinsic properties to environmental demands.Consequently, two studies have been carried out.Study 2 aimed to describe the kinematic characteristics of reaching movements in 4-6-month-old DS infants and to test the influence of intrinsic factors, namely Down syndrome and gross motor skill level, on reaching and grasping behaviors.Seven infants with DS and seven infants with typical development (TD) were assessed at 4, 5 and 6 months-old.Gross motor skill was assessed by using Alberta Infant Motor Scale (AIMS).Infants were placed in a baby chair reclined 50 from the horizontal.A soft object (12.5 cm in diameter) was presented at infant's midline, shoulders height, and arm's length.The following variables were analyzed: straightness index (SI), mean velocity, movement units, deceleration time and grasping frequency.DS infants demonstrate variability in the age of reaching acquisition.The DS and the level of gross motor skills were found to influence grasping frequency.Faced with a task that did not impose excessive demand, kinematic characteristics of reaching in DS infants were quite similar to typical infants, except for the number of movement units at 5 months, which was higher for DS infants, and for SI at 6 months, which was lower for these infants.On the other hand, grasping frequency was lower for DS infants.In order to understand DS infants' ability to reach for and grasp objects of different sizes, Study 3 was carried out.Grasping and kinematic characteristics of reaches performed by the same infants for large and small objects were analyzed.These reaches were recorded during the same experimental procedure of Study 2. The object size has induced kinematic changes in reaches performed by DS infants, what suggests that they are exploring strategies to move.The adoption of variable movement strategies suggests perception of affordances of the objects.Nevertheless, DS infants failed to grasp the object, which may indicate that they need more experience in the task in order to adapt their actions to their intrinsic constraints.The results of this study point to the importance of considering the individual variability and the confluence of multiple factors in the development of reaching and grasping, since the organismic conditions in interaction with the task demands, were found to influence reaching and grasping performance.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,003 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,002 |
| Études des sciences et des technologies | 0,003 | 0,000 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,002 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».