期刊
CEREBRAL CORTEX
卷 29, 期 3, 页码 1328-1341出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhy285
关键词
body perception; electrocorticography; functional magnetic resonance imaging; rubber hand illusion
资金
- NIH [NS065186, NS079200]
- NSF [EEC-1028725, DGE-1256082, IIS-1514790]
- Swedish Research Council
- Torsten Soderbergs Stiftelse
- Wenner-Gren Foundation
- Swedish Society of Medicine
- Foundation Blanceflor
- [2K12HD001097]
Over the past decade, numerous neuroimaging studies based on hemodynamic markers of brain activity have examined the feeling of body ownership using perceptual body-illusions in humans. However, the direct electrophysiological correlates of body ownership at the cortical level remain unexplored. To address this, we studied the rubber hand illusion in 5 patients (3 males and 2 females) implanted with intracranial electrodes measuring cortical surface potentials. Increased high- (70-200 Hz) activity, an index of neuronal firing rate, in premotor and intraparietal cortices reflected the feeling of ownership. In both areas, high- increases were intimately coupled with the subjective illusion onset and sustained both during and in-between touches. However, intraparietal activity was modulated by tactile stimulation to a higher degree than the premotor cortex through effective connectivity with the hand-somatosensory cortex, which suggests different functional roles. These findings constitute the first intracranial electrophysiological characterization of the rubber hand illusion and extend our understanding of the dynamic mechanisms of body ownership.
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