1. Topographic numerosity maps cover subitizing and estimation ranges
- Author
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Cai, Yuxuan, Hofstetter, Shir, van Dijk, Jelle, Zuiderbaan, Wietske, van der Zwaag, Wietske, Harvey, Ben M., Dumoulin, Serge O., Leerstoel Kenemans, Leerstoel Dumoulin, Leerstoel Stigchel, Experimental Psychology (onderzoeksprogramma PF), Helmholtz Institute, Cognitive Psychology, Spinoza Centre for Neuroimaging, Leerstoel Kenemans, Leerstoel Dumoulin, Leerstoel Stigchel, Experimental Psychology (onderzoeksprogramma PF), and Helmholtz Institute
- Subjects
Adult ,Male ,Chemistry(all) ,Computer science ,Science ,media_common.quotation_subject ,Subitizing ,General Physics and Astronomy ,Physics and Astronomy(all) ,Biochemistry ,050105 experimental psychology ,General Biochemistry, Genetics and Molecular Biology ,Article ,Extrastriate cortex ,03 medical and health sciences ,0302 clinical medicine ,Cortical magnification ,Perception ,Approximate number system ,Humans ,0501 psychology and cognitive sciences ,Set (psychology) ,media_common ,Brain Mapping ,Multidisciplinary ,Biochemistry, Genetics and Molecular Biology(all) ,05 social sciences ,Brain ,Reproducibility of Results ,Numerosity adaptation effect ,General Chemistry ,Middle Aged ,Topographic map ,Magnetic Resonance Imaging ,Cover (topology) ,Visual Perception ,Female ,Nerve Net ,Cartography ,030217 neurology & neurosurgery ,Photic Stimulation ,Genetics and Molecular Biology(all) - Abstract
Numerosity, the set size of a group of items, helps guide behaviour and decisions. Non-symbolic numerosities are represented by the approximate number system. However, distinct behavioural performance suggests that small numerosities, i.e. subitizing range, are implemented differently in the brain than larger numerosities. Prior work has shown that neural populations selectively responding (i.e. hemodynamic responses) to small numerosities are organized into a network of topographical maps. Here, we investigate how neural populations respond to large numerosities, well into the ANS. Using 7 T fMRI and biologically-inspired analyses, we found a network of neural populations tuned to both small and large numerosities organized within the same topographic maps. These results demonstrate a continuum of numerosity preferences that progressively cover both the subitizing range and beyond within the same numerosity map, suggesting a single neural mechanism. We hypothesize that differences in map properties, such as cortical magnification and tuning width, underlie known differences in behaviour., Here, the authors show that the brain represents small and large numerosity ranges in a continuous topographic map, in line with the idea that differences in map properties underlie differences in perception.
- Published
- 2021