期刊
NEUROPSYCHOLOGIA
卷 48, 期 9, 页码 2740-2749出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropsychologia.2010.05.021
关键词
Agency; Body-ownership; Supplementary motor area; Parietal cortex; Cortical midline structures; Self
资金
- Bial Foundation [165/06]
- Biotechnology and Biological Sciences Research Council [BB/D009529/1]
- Leverhulme Trust
- Biotechnology and Biological Sciences Research Council [BB/D009529/1] Funding Source: researchfish
- Economic and Social Research Council [RES-000-23-1571] Funding Source: researchfish
- BBSRC [BB/D009529/1] Funding Source: UKRI
- ESRC [RES-000-23-1571] Funding Source: UKRI
The exact relation between the sense that one's body is one's own (body-ownership) and the sense that one controls one's own bodily actions (agency) has been the focus of much speculation, but remains unclear. On an 'additive' model, agency and body-ownership are strongly related; the ability to control actions is a powerful cue to body-ownership. This view implies a component common to the senses of body-ownership and agency, plus possible additional components unique to agency. An alternative 'independence' model holds that agency and body-ownership are qualitatively different experiences, triggered by different inputs, and recruiting distinct brain networks. We tested these two specific models by investigating the sensory and motor aspects of body-representation in the brain using fMRI. Activations in midline cortical structures were associated with a sensory-driven sense of body-ownership, and were absent in agency conditions. Activity in the pre-SMA was linked to the sense of agency, but distinct from the sense of body-ownership. No shared activations that would support the additive model were found. The results support the independence model. Body-ownership involves a psychophysiological baseline, linked to activation of the brain's default mode network. Agency is linked to premotor and parietal areas involved in generating motor intentions and subsequent action monitoring. (C) 2010 Elsevier Ltd. All rights reserved.
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