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Journal of Autism and Developmental Disorders

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01-12-2013 | Original Paper

Grasping Motor Impairments in Autism: Not Action Planning but Movement Execution is Deficient

Auteurs: Astrid M. B. Stoit, Hein T. van Schie, Dorine I. E. Slaats-Willemse, Jan K. Buitelaar

Gepubliceerd in: Journal of Autism and Developmental Disorders | Uitgave 12/2013

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.

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Note that the opposite may also occur, when the manner in which an object is grasped or held influences the selection of the action goal.

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Titel: Grasping Motor Impairments in Autism: Not Action Planning but Movement Execution is Deficient
Auteurs: Astrid M. B. Stoit
Hein T. van Schie
Dorine I. E. Slaats-Willemse
Jan K. Buitelaar
Publicatiedatum: 01-12-2013
Uitgeverij: Springer US
Gepubliceerd in: Journal of Autism and Developmental Disorders / Uitgave 12/2013
Print ISSN: 0162-3257
Elektronisch ISSN: 1573-3432
DOI: https://doi.org/10.1007/s10803-013-1825-8

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