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Proc Natl Acad Sci U S A. 2007 Nov 6;104(45):17825-30. Epub 2007 Oct 26.

Impairment of actions chains in autism and its possible role in intention understanding.

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  • 1Dipartimento di Neuroscienze, Universit√† di Parma, Via Volturno 39, 43100 Parma, Italy.

Abstract

Experiments in monkeys demonstrated that many parietal and premotor neurons coding a specific motor act (e.g., grasping) show a markedly different activation when this act is part of actions that have different goals (e.g., grasping for eating vs. grasping for placing). Many of these "action-constrained" neurons have mirror properties firing selectively to the observation of the initial motor act of the actions to which they belong motorically. By activating a specific action chain from its very outset, this mechanism allows the observers to have an internal copy of the whole action before its execution, thus enabling them to understand directly the agent's intention. Using electromyographic recordings, we show that a similar chained organization exists in typically developing children, whereas it is impaired in children with autism. We propose that, as a consequence of this functional impairment, high-functioning autistic children may understand the intentions of others cognitively but lack the mechanism for understanding them experientially.

PMID:
17965234
PMCID:
PMC2077067
DOI:
10.1073/pnas.0706273104
[PubMed - indexed for MEDLINE]
Free PMC Article
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