Development of motor planning for dexterity tasks in trisomy 21

Marianne ´ Jover (1)

1 PsyCLÉ - Centre de Recherche en Psychologie de la Connaissance, du Langage et de l'Émotion

We examinedthemacroscopicaspectsofmotorplanningintwomanualdexteritytasks, comparingchildren,adolescents,andyoungadultswithtrisomy21(T21)withtypically developingcontrolsfromadevelopmentalperspective.Weanalyzedtheorderinwhich objects werepickedupfromatableduringtwomanualtasksoftheMovementAssessment Battery forChildren(M-ABC).ParticipantswithT21werealwaysslowerthancontrols. Task completiontimesdependedonthestrategyusedbyparticipantstogatherupthe pegs orcoins.Astructuredstrategy,inwhichtheparticipantspickedtheitemsupmoving methodicallyalongeachrow/column,contributedtorapidtaskcompletionbyyounger children andparticipantswithT21.ThisstudyhighlightstheabilityofchildrenwithT21to select andmaintainanefficientstrategythattakesaccountoftheirmotordifficulties. DevelopmentaltrajectorieshelptoexplainT21functioninginthesedexteritytasks.

Mots clés: Trisomy 21 Motor planning Children Adolescents Young adults Dexterity

Domaines: Psychologie

Marianne ´ Jover. Development of motor planning for dexterity tasks in trisomy 21. Research in developmental disabilities, 2014. ⟨hal-03603326⟩