期刊
CEREBRAL CORTEX
卷 20, 期 9, 页码 2166-2171出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhp273
关键词
brain stimulation; neuronal specialization; numerical cognition; parietal lobes; representation
资金
- Marie Curie Intra European Fellowship
- Wellcome Trust [WT88378]
- Medical Research Council
- Medical Research Council [G0700929] Funding Source: researchfish
- MRC [G0700929] Funding Source: UKRI
Based on neuroimaging methods, it is a commonly held view that numerical representation in the human parietal lobes is format independent. We used a transcranial magnetic stimulation adaptation paradigm to examine the existence of functionally segregated overlapping populations of neurons for different numerical formats and to reveal how numerical information is encoded and represented. Based on 2 experiments, we found that right parietal lobe stimulation showed a dissociation between digits and verbal numbers, whereas the left parietal lobe showed a double dissociation between the different numerical formats. Further analysis and modeling also excluded pre- or postrepresentational components as the source of the current effects. These results demonstrate that both parietal lobes are equipped with format-dependent neurons that encode quantity.
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