ArticleCerebral cortex (New York, N.Y. : 1991)2020
Unconscious Number Discrimination in the Human Visual System.
Article in Cerebral cortex (New York, N.Y. : 1991), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Identifying conceptual neural responses to symbolic numerals.Proceedings. Biological sciences · 2024Article
- AVNC: Attention-Based VGG-Style Network for COVID-19 Diagnosis by CBAM.IEEE sensors journal · 2022Article
- The relative salience of numerical and non-numerical dimensions shifts over development: A re-analysis of.Cognition · 2021Article
- Automatic Processing of Numerosity in Human Neocortex Evidenced by Occipital and Parietal Neuromagnetic Responses.Cerebral cortex communications · 2021Article
- Apical amplification-a cellular mechanism of conscious perception?Neuroscience of consciousness · 2021Article
- A robust electrophysiological marker of spontaneous numerical discrimination.Scientific reports · 2020Article
Corrections and comments
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Authors and funding
7 authors.
Funding
Abstract
How do humans compute approximate number? According to one influential theory, approximate number representations arise in the intraparietal sulcus and are amodal, meaning that they arise independent of any sensory modality. Alternatively, approximate number may be computed initially within sensory systems. Here we tested for sensitivity to approximate number in the visual system using steady state visual evoked potentials. We recorded electroencephalography from humans while they viewed dotclouds presented at 30 Hz, which alternated in numerosity (ranging from 10 to 20 dots) at 15 Hz. At this rate, each dotcloud backward masked the previous dotcloud, disrupting top-down feedback to visual cortex and preventing conscious awareness of the dotclouds' numerosities. Spectral amplitude at 15 Hz measured over the occipital lobe (Oz) correlated positively with the numerical ratio of the stimuli, even when nonnumerical stimulus attributes were controlled, indicating that subjects' visual systems were differentiating dotclouds on the basis of their numerical ratios. Crucially, subjects were unable to discriminate the numerosities of the dotclouds consciously, indicating the backward masking of the stimuli disrupted reentrant feedback to visual cortex. Approximate number appears to be computed within the visual system, independently of higher-order areas, such as the intraparietal sulcus.
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