title: Influence of Different Sitting Positions on Healthy Infants' Reaching Movements.
abstract: The authors analyze the influence of different sitting positions (ring and flexion) on the reaching performance (spatiotemporal variables) of full-term infants 6 and 7 months old. In addition, they correlated level of trunk control, measured by the Segmental Assessment of Trunk Control, with performance during reaching. The different sitting positions only influenced the reaching movements of 6-month-old infants, who showed the best performance in the ring position. However, this influence was observed only for the trunk displacement, deceleration time, movement units, straightness index and mean velocity. In contrast, there was no influence of positions on 7-month-old infants' reaching performance. Regarding the correlations, it was observed that infants with more level of trunk control showed a better performance when reaching, regardless of position and the age assessed.
authors.affiliation: a Department of Physiotherapy , Federal University of São Carlos , São Carlos , Brazil.
authors.forename: Erika Shirley
authors.initials: ES
authors.lastname: Moreira da Silva
authors.affiliation: b Laboratory of Neurological Physiotherapy Research, Department of Physiotherapy , Federal University of São Carlos , São Carlos , Brazil.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Lopes Dos Santos
authors.affiliation: a Department of Physiotherapy , Federal University of São Carlos , São Carlos , Brazil.
authors.forename: Ana Luiza
authors.initials: AL
authors.lastname: Righetto Greco
authors.affiliation: a Department of Physiotherapy , Federal University of São Carlos , São Carlos , Brazil.
authors.forename: Eloisa
authors.initials: E
authors.lastname: Tudella
mesh_terms: D002657:Child Development / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009068:Movement / Q000502:physiology*; D004856:Postural Balance / Q000502:physiology; D011187:Posture / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology*; D060726:Torso / Q000502:physiology
keywords: child development; motor skills; postural balance; upper extremity