Grasping motor impairments in Autism: Not action planning but movement execution is deficient

A.M.B. Stoit, H.T. Van Schie, D.I.E. Slaats-Willemse, J.K. Buitelaar

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Different views on the origin of deficits in action chaining in autism spectrum disorders (ASD) have been posited, ranging from functional impairments in action planning to internal models supporting motor control. Thirty-one children and adolescents with ASD and twenty-nine matched controls participated in a two-choice reach-to-grasp paradigm wherein participants received cueing information indicating either the object location or the required manner of grasping. A similar advantage for location cueing over grip cueing was found in both groups. Both accuracy and reaction times of the ASD group were indistinguishable from the control group. In contrast, movement times of the ASD group were significantly delayed in comparison with controls. These findings suggest that movement execution rather than action planning is deficient in ASD, and that deficits in action chaining derive from impairments in internal action models supporting action execution. © 2013 Springer Science+Business Media New York.
Original languageEnglish
Pages (from-to)2793-2806
JournalJournal of Autism and Developmental Disorders
Volume43
Issue number12
DOIs
Publication statusPublished - Dec 2013
Externally publishedYes

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